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Added required plugins (acts_as_list, acts_as_tree and classic_pagination).

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git-svn-id: http://redmine.rubyforge.org/svn/branches/work@966 e93f8b46-1217-0410-a6f0-8f06a7374b81
This commit is contained in:
Jean-Philippe Lang 2007-12-09 21:53:46 +00:00
parent 406f6431e9
commit d217ec2a47
36 changed files with 2245 additions and 0 deletions
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23
rails-2.0/vendor/plugins/acts_as_list/README vendored Normal file
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ActsAsList
==========
This acts_as extension provides the capabilities for sorting and reordering a number of objects in a list. The class that has this specified needs to have a +position+ column defined as an integer on the mapped database table.
Example
=======
class TodoList < ActiveRecord::Base
has_many :todo_items, :order => "position"
end
class TodoItem < ActiveRecord::Base
belongs_to :todo_list
acts_as_list :scope => :todo_list
end
todo_list.first.move_to_bottom
todo_list.last.move_higher
Copyright (c) 2007 David Heinemeier Hansson, released under the MIT license

3
rails-2.0/vendor/plugins/acts_as_list/init.rb vendored Normal file
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$:.unshift "#{File.dirname(__FILE__)}/lib"
require 'active_record/acts/list'
ActiveRecord::Base.class_eval { include ActiveRecord::Acts::List }

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rails-2.0/vendor/plugins/acts_as_list/lib/active_record/acts/list.rb vendored Normal file
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module ActiveRecord
module Acts #:nodoc:
module List #:nodoc:
def self.included(base)
base.extend(ClassMethods)
end
# This +acts_as+ extension provides the capabilities for sorting and reordering a number of objects in a list.
# The class that has this specified needs to have a +position+ column defined as an integer on
# the mapped database table.
#
# Todo list example:
#
# class TodoList < ActiveRecord::Base
# has_many :todo_items, :order => "position"
# end
#
# class TodoItem < ActiveRecord::Base
# belongs_to :todo_list
# acts_as_list :scope => :todo_list
# end
#
# todo_list.first.move_to_bottom
# todo_list.last.move_higher
module ClassMethods
# Configuration options are:
#
# * +column+ - specifies the column name to use for keeping the position integer (default: +position+)
# * +scope+ - restricts what is to be considered a list. Given a symbol, it'll attach <tt>_id</tt>
# (if it hasn't already been added) and use that as the foreign key restriction. It's also possible
# to give it an entire string that is interpolated if you need a tighter scope than just a foreign key.
# Example: <tt>acts_as_list :scope => 'todo_list_id = #{todo_list_id} AND completed = 0'</tt>
def acts_as_list(options = {})
configuration = { :column => "position", :scope => "1 = 1" }
configuration.update(options) if options.is_a?(Hash)
configuration[:scope] = "#{configuration[:scope]}_id".intern if configuration[:scope].is_a?(Symbol) && configuration[:scope].to_s !~ /_id$/
if configuration[:scope].is_a?(Symbol)
scope_condition_method = %(
def scope_condition
if #{configuration[:scope].to_s}.nil?
"#{configuration[:scope].to_s} IS NULL"
else
"#{configuration[:scope].to_s} = \#{#{configuration[:scope].to_s}}"
end
end
)
else
scope_condition_method = "def scope_condition() \"#{configuration[:scope]}\" end"
end
class_eval <<-EOV
include ActiveRecord::Acts::List::InstanceMethods
def acts_as_list_class
::#{self.name}
end
def position_column
'#{configuration[:column]}'
end
#{scope_condition_method}
before_destroy :remove_from_list
before_create :add_to_list_bottom
EOV
end
end
# All the methods available to a record that has had <tt>acts_as_list</tt> specified. Each method works
# by assuming the object to be the item in the list, so <tt>chapter.move_lower</tt> would move that chapter
# lower in the list of all chapters. Likewise, <tt>chapter.first?</tt> would return +true+ if that chapter is
# the first in the list of all chapters.
module InstanceMethods
# Insert the item at the given position (defaults to the top position of 1).
def insert_at(position = 1)
insert_at_position(position)
end
# Swap positions with the next lower item, if one exists.
def move_lower
return unless lower_item
acts_as_list_class.transaction do
lower_item.decrement_position
increment_position
end
end
# Swap positions with the next higher item, if one exists.
def move_higher
return unless higher_item
acts_as_list_class.transaction do
higher_item.increment_position
decrement_position
end
end
# Move to the bottom of the list. If the item is already in the list, the items below it have their
# position adjusted accordingly.
def move_to_bottom
return unless in_list?
acts_as_list_class.transaction do
decrement_positions_on_lower_items
assume_bottom_position
end
end
# Move to the top of the list. If the item is already in the list, the items above it have their
# position adjusted accordingly.
def move_to_top
return unless in_list?
acts_as_list_class.transaction do
increment_positions_on_higher_items
assume_top_position
end
end
# Removes the item from the list.
def remove_from_list
if in_list?
decrement_positions_on_lower_items
update_attribute position_column, nil
end
end
# Increase the position of this item without adjusting the rest of the list.
def increment_position
return unless in_list?
update_attribute position_column, self.send(position_column).to_i + 1
end
# Decrease the position of this item without adjusting the rest of the list.
def decrement_position
return unless in_list?
update_attribute position_column, self.send(position_column).to_i - 1
end
# Return +true+ if this object is the first in the list.
def first?
return false unless in_list?
self.send(position_column) == 1
end
# Return +true+ if this object is the last in the list.
def last?
return false unless in_list?
self.send(position_column) == bottom_position_in_list
end
# Return the next higher item in the list.
def higher_item
return nil unless in_list?
acts_as_list_class.find(:first, :conditions =>
"#{scope_condition} AND #{position_column} = #{(send(position_column).to_i - 1).to_s}"
)
end
# Return the next lower item in the list.
def lower_item
return nil unless in_list?
acts_as_list_class.find(:first, :conditions =>
"#{scope_condition} AND #{position_column} = #{(send(position_column).to_i + 1).to_s}"
)
end
# Test if this record is in a list
def in_list?
!send(position_column).nil?
end
private
def add_to_list_top
increment_positions_on_all_items
end
def add_to_list_bottom
self[position_column] = bottom_position_in_list.to_i + 1
end
# Overwrite this method to define the scope of the list changes
def scope_condition() "1" end
# Returns the bottom position number in the list.
# bottom_position_in_list # => 2
def bottom_position_in_list(except = nil)
item = bottom_item(except)
item ? item.send(position_column) : 0
end
# Returns the bottom item
def bottom_item(except = nil)
conditions = scope_condition
conditions = "#{conditions} AND #{self.class.primary_key} != #{except.id}" if except
acts_as_list_class.find(:first, :conditions => conditions, :order => "#{position_column} DESC")
end
# Forces item to assume the bottom position in the list.
def assume_bottom_position
update_attribute(position_column, bottom_position_in_list(self).to_i + 1)
end
# Forces item to assume the top position in the list.
def assume_top_position
update_attribute(position_column, 1)
end
# This has the effect of moving all the higher items up one.
def decrement_positions_on_higher_items(position)
acts_as_list_class.update_all(
"#{position_column} = (#{position_column} - 1)", "#{scope_condition} AND #{position_column} <= #{position}"
)
end
# This has the effect of moving all the lower items up one.
def decrement_positions_on_lower_items
return unless in_list?
acts_as_list_class.update_all(
"#{position_column} = (#{position_column} - 1)", "#{scope_condition} AND #{position_column} > #{send(position_column).to_i}"
)
end
# This has the effect of moving all the higher items down one.
def increment_positions_on_higher_items
return unless in_list?
acts_as_list_class.update_all(
"#{position_column} = (#{position_column} + 1)", "#{scope_condition} AND #{position_column} < #{send(position_column).to_i}"
)
end
# This has the effect of moving all the lower items down one.
def increment_positions_on_lower_items(position)
acts_as_list_class.update_all(
"#{position_column} = (#{position_column} + 1)", "#{scope_condition} AND #{position_column} >= #{position}"
)
end
# Increments position (<tt>position_column</tt>) of all items in the list.
def increment_positions_on_all_items
acts_as_list_class.update_all(
"#{position_column} = (#{position_column} + 1)", "#{scope_condition}"
)
end
def insert_at_position(position)
remove_from_list
increment_positions_on_lower_items(position)
self.update_attribute(position_column, position)
end
end
end
end
end

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rails-2.0/vendor/plugins/acts_as_list/test/list_test.rb vendored Normal file
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require 'test/unit'
require 'rubygems'
gem 'activerecord', '>= 1.15.4.7794'
require 'active_record'
require "#{File.dirname(__FILE__)}/../init"
ActiveRecord::Base.establish_connection(:adapter => "sqlite3", :dbfile => ":memory:")
def setup_db
ActiveRecord::Schema.define(:version => 1) do
create_table :mixins do |t|
t.column :pos, :integer
t.column :parent_id, :integer
t.column :created_at, :datetime
t.column :updated_at, :datetime
end
end
end
def teardown_db
ActiveRecord::Base.connection.tables.each do |table|
ActiveRecord::Base.connection.drop_table(table)
end
end
class Mixin < ActiveRecord::Base
end
class ListMixin < Mixin
acts_as_list :column => "pos", :scope => :parent
def self.table_name() "mixins" end
end
class ListMixinSub1 < ListMixin
end
class ListMixinSub2 < ListMixin
end
class ListWithStringScopeMixin < ActiveRecord::Base
acts_as_list :column => "pos", :scope => 'parent_id = #{parent_id}'
def self.table_name() "mixins" end
end
class ListTest < Test::Unit::TestCase
def setup
setup_db
(1..4).each { |counter| ListMixin.create! :pos => counter, :parent_id => 5 }
end
def teardown
teardown_db
end
def test_reordering
assert_equal [1, 2, 3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)
ListMixin.find(2).move_lower
assert_equal [1, 3, 2, 4], ListMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)
ListMixin.find(2).move_higher
assert_equal [1, 2, 3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)
ListMixin.find(1).move_to_bottom
assert_equal [2, 3, 4, 1], ListMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)
ListMixin.find(1).move_to_top
assert_equal [1, 2, 3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)
ListMixin.find(2).move_to_bottom
assert_equal [1, 3, 4, 2], ListMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)
ListMixin.find(4).move_to_top
assert_equal [4, 1, 3, 2], ListMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)
end
def test_move_to_bottom_with_next_to_last_item
assert_equal [1, 2, 3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)
ListMixin.find(3).move_to_bottom
assert_equal [1, 2, 4, 3], ListMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)
end
def test_next_prev
assert_equal ListMixin.find(2), ListMixin.find(1).lower_item
assert_nil ListMixin.find(1).higher_item
assert_equal ListMixin.find(3), ListMixin.find(4).higher_item
assert_nil ListMixin.find(4).lower_item
end
def test_injection
item = ListMixin.new(:parent_id => 1)
assert_equal "parent_id = 1", item.scope_condition
assert_equal "pos", item.position_column
end
def test_insert
new = ListMixin.create(:parent_id => 20)
assert_equal 1, new.pos
assert new.first?
assert new.last?
new = ListMixin.create(:parent_id => 20)
assert_equal 2, new.pos
assert !new.first?
assert new.last?
new = ListMixin.create(:parent_id => 20)
assert_equal 3, new.pos
assert !new.first?
assert new.last?
new = ListMixin.create(:parent_id => 0)
assert_equal 1, new.pos
assert new.first?
assert new.last?
end
def test_insert_at
new = ListMixin.create(:parent_id => 20)
assert_equal 1, new.pos
new = ListMixin.create(:parent_id => 20)
assert_equal 2, new.pos
new = ListMixin.create(:parent_id => 20)
assert_equal 3, new.pos
new4 = ListMixin.create(:parent_id => 20)
assert_equal 4, new4.pos
new4.insert_at(3)
assert_equal 3, new4.pos
new.reload
assert_equal 4, new.pos
new.insert_at(2)
assert_equal 2, new.pos
new4.reload
assert_equal 4, new4.pos
new5 = ListMixin.create(:parent_id => 20)
assert_equal 5, new5.pos
new5.insert_at(1)
assert_equal 1, new5.pos
new4.reload
assert_equal 5, new4.pos
end
def test_delete_middle
assert_equal [1, 2, 3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)
ListMixin.find(2).destroy
assert_equal [1, 3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)
assert_equal 1, ListMixin.find(1).pos
assert_equal 2, ListMixin.find(3).pos
assert_equal 3, ListMixin.find(4).pos
ListMixin.find(1).destroy
assert_equal [3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)
assert_equal 1, ListMixin.find(3).pos
assert_equal 2, ListMixin.find(4).pos
end
def test_with_string_based_scope
new = ListWithStringScopeMixin.create(:parent_id => 500)
assert_equal 1, new.pos
assert new.first?
assert new.last?
end
def test_nil_scope
new1, new2, new3 = ListMixin.create, ListMixin.create, ListMixin.create
new2.move_higher
assert_equal [new2, new1, new3], ListMixin.find(:all, :conditions => 'parent_id IS NULL', :order => 'pos')
end
def test_remove_from_list_should_then_fail_in_list?
assert_equal true, ListMixin.find(1).in_list?
ListMixin.find(1).remove_from_list
assert_equal false, ListMixin.find(1).in_list?
end
def test_remove_from_list_should_set_position_to_nil
assert_equal [1, 2, 3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)
ListMixin.find(2).remove_from_list
assert_equal [2, 1, 3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)
assert_equal 1, ListMixin.find(1).pos
assert_equal nil, ListMixin.find(2).pos
assert_equal 2, ListMixin.find(3).pos
assert_equal 3, ListMixin.find(4).pos
end
def test_remove_before_destroy_does_not_shift_lower_items_twice
assert_equal [1, 2, 3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)
ListMixin.find(2).remove_from_list
ListMixin.find(2).destroy
assert_equal [1, 3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5', :order => 'pos').map(&:id)
assert_equal 1, ListMixin.find(1).pos
assert_equal 2, ListMixin.find(3).pos
assert_equal 3, ListMixin.find(4).pos
end
end
class ListSubTest < Test::Unit::TestCase
def setup
setup_db
(1..4).each { |i| ((i % 2 == 1) ? ListMixinSub1 : ListMixinSub2).create! :pos => i, :parent_id => 5000 }
end
def teardown
teardown_db
end
def test_reordering
assert_equal [1, 2, 3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5000', :order => 'pos').map(&:id)
ListMixin.find(2).move_lower
assert_equal [1, 3, 2, 4], ListMixin.find(:all, :conditions => 'parent_id = 5000', :order => 'pos').map(&:id)
ListMixin.find(2).move_higher
assert_equal [1, 2, 3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5000', :order => 'pos').map(&:id)
ListMixin.find(1).move_to_bottom
assert_equal [2, 3, 4, 1], ListMixin.find(:all, :conditions => 'parent_id = 5000', :order => 'pos').map(&:id)
ListMixin.find(1).move_to_top
assert_equal [1, 2, 3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5000', :order => 'pos').map(&:id)
ListMixin.find(2).move_to_bottom
assert_equal [1, 3, 4, 2], ListMixin.find(:all, :conditions => 'parent_id = 5000', :order => 'pos').map(&:id)
ListMixin.find(4).move_to_top
assert_equal [4, 1, 3, 2], ListMixin.find(:all, :conditions => 'parent_id = 5000', :order => 'pos').map(&:id)
end
def test_move_to_bottom_with_next_to_last_item
assert_equal [1, 2, 3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5000', :order => 'pos').map(&:id)
ListMixin.find(3).move_to_bottom
assert_equal [1, 2, 4, 3], ListMixin.find(:all, :conditions => 'parent_id = 5000', :order => 'pos').map(&:id)
end
def test_next_prev
assert_equal ListMixin.find(2), ListMixin.find(1).lower_item
assert_nil ListMixin.find(1).higher_item
assert_equal ListMixin.find(3), ListMixin.find(4).higher_item
assert_nil ListMixin.find(4).lower_item
end
def test_injection
item = ListMixin.new("parent_id"=>1)
assert_equal "parent_id = 1", item.scope_condition
assert_equal "pos", item.position_column
end
def test_insert_at
new = ListMixin.create("parent_id" => 20)
assert_equal 1, new.pos
new = ListMixinSub1.create("parent_id" => 20)
assert_equal 2, new.pos
new = ListMixinSub2.create("parent_id" => 20)
assert_equal 3, new.pos
new4 = ListMixin.create("parent_id" => 20)
assert_equal 4, new4.pos
new4.insert_at(3)
assert_equal 3, new4.pos
new.reload
assert_equal 4, new.pos
new.insert_at(2)
assert_equal 2, new.pos
new4.reload
assert_equal 4, new4.pos
new5 = ListMixinSub1.create("parent_id" => 20)
assert_equal 5, new5.pos
new5.insert_at(1)
assert_equal 1, new5.pos
new4.reload
assert_equal 5, new4.pos
end
def test_delete_middle
assert_equal [1, 2, 3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5000', :order => 'pos').map(&:id)
ListMixin.find(2).destroy
assert_equal [1, 3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5000', :order => 'pos').map(&:id)
assert_equal 1, ListMixin.find(1).pos
assert_equal 2, ListMixin.find(3).pos
assert_equal 3, ListMixin.find(4).pos
ListMixin.find(1).destroy
assert_equal [3, 4], ListMixin.find(:all, :conditions => 'parent_id = 5000', :order => 'pos').map(&:id)
assert_equal 1, ListMixin.find(3).pos
assert_equal 2, ListMixin.find(4).pos
end
end

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acts_as_tree
============
Specify this +acts_as+ extension if you want to model a tree structure by providing a parent association and a children
association. This requires that you have a foreign key column, which by default is called +parent_id+.
class Category < ActiveRecord::Base
acts_as_tree :order => "name"
end
Example:
root
\_ child1
\_ subchild1
\_ subchild2
root = Category.create("name" => "root")
child1 = root.children.create("name" => "child1")
subchild1 = child1.children.create("name" => "subchild1")
root.parent # => nil
child1.parent # => root
root.children # => [child1]
root.children.first.children.first # => subchild1
Copyright (c) 2007 David Heinemeier Hansson, released under the MIT license

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require 'rake'
require 'rake/testtask'
require 'rake/rdoctask'
desc 'Default: run unit tests.'
task :default => :test
desc 'Test acts_as_tree plugin.'
Rake::TestTask.new(:test) do |t|
t.libs << 'lib'
t.pattern = 'test/**/*_test.rb'
t.verbose = true
end
desc 'Generate documentation for acts_as_tree plugin.'
Rake::RDocTask.new(:rdoc) do |rdoc|
rdoc.rdoc_dir = 'rdoc'
rdoc.title = 'acts_as_tree'
rdoc.options << '--line-numbers' << '--inline-source'
rdoc.rdoc_files.include('README')
rdoc.rdoc_files.include('lib/**/*.rb')
end

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ActiveRecord::Base.send :include, ActiveRecord::Acts::Tree

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module ActiveRecord
module Acts
module Tree
def self.included(base)
base.extend(ClassMethods)
end
# Specify this +acts_as+ extension if you want to model a tree structure by providing a parent association and a children
# association. This requires that you have a foreign key column, which by default is called +parent_id+.
#
# class Category < ActiveRecord::Base
# acts_as_tree :order => "name"
# end
#
# Example:
# root
# \_ child1
# \_ subchild1
# \_ subchild2
#
# root = Category.create("name" => "root")
# child1 = root.children.create("name" => "child1")
# subchild1 = child1.children.create("name" => "subchild1")
#
# root.parent # => nil
# child1.parent # => root
# root.children # => [child1]
# root.children.first.children.first # => subchild1
#
# In addition to the parent and children associations, the following instance methods are added to the class
# after calling <tt>acts_as_tree</tt>:
# * <tt>siblings</tt> - Returns all the children of the parent, excluding the current node (<tt>[subchild2]</tt> when called on <tt>subchild1</tt>)
# * <tt>self_and_siblings</tt> - Returns all the children of the parent, including the current node (<tt>[subchild1, subchild2]</tt> when called on <tt>subchild1</tt>)
# * <tt>ancestors</tt> - Returns all the ancestors of the current node (<tt>[child1, root]</tt> when called on <tt>subchild2</tt>)
# * <tt>root</tt> - Returns the root of the current node (<tt>root</tt> when called on <tt>subchild2</tt>)
module ClassMethods
# Configuration options are:
#
# * <tt>foreign_key</tt> - specifies the column name to use for tracking of the tree (default: +parent_id+)
# * <tt>order</tt> - makes it possible to sort the children according to this SQL snippet.
# * <tt>counter_cache</tt> - keeps a count in a +children_count+ column if set to +true+ (default: +false+).
def acts_as_tree(options = {})
configuration = { :foreign_key => "parent_id", :order => nil, :counter_cache => nil }
configuration.update(options) if options.is_a?(Hash)
belongs_to :parent, :class_name => name, :foreign_key => configuration[:foreign_key], :counter_cache => configuration[:counter_cache]
has_many :children, :class_name => name, :foreign_key => configuration[:foreign_key], :order => configuration[:order], :dependent => :destroy
class_eval <<-EOV
include ActiveRecord::Acts::Tree::InstanceMethods
def self.roots
find(:all, :conditions => "#{configuration[:foreign_key]} IS NULL", :order => #{configuration[:order].nil? ? "nil" : %Q{"#{configuration[:order]}"}})
end
def self.root
find(:first, :conditions => "#{configuration[:foreign_key]} IS NULL", :order => #{configuration[:order].nil? ? "nil" : %Q{"#{configuration[:order]}"}})
end
EOV
end
end
module InstanceMethods
# Returns list of ancestors, starting from parent until root.
#
# subchild1.ancestors # => [child1, root]
def ancestors
node, nodes = self, []
nodes << node = node.parent while node.parent
nodes
end
# Returns the root node of the tree.
def root
node = self
node = node.parent while node.parent
node
end
# Returns all siblings of the current node.
#
# subchild1.siblings # => [subchild2]
def siblings
self_and_siblings - [self]
end
# Returns all siblings and a reference to the current node.
#
# subchild1.self_and_siblings # => [subchild1, subchild2]
def self_and_siblings
parent ? parent.children : self.class.roots
end
end
end
end
end

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require 'test/unit'
require 'rubygems'
require 'active_record'
$:.unshift File.dirname(__FILE__) + '/../lib'
require File.dirname(__FILE__) + '/../init'
class Test::Unit::TestCase
def assert_queries(num = 1)
$query_count = 0
yield
ensure
assert_equal num, $query_count, "#{$query_count} instead of #{num} queries were executed."
end
def assert_no_queries(&block)
assert_queries(0, &block)
end
end
ActiveRecord::Base.establish_connection(:adapter => "sqlite3", :dbfile => ":memory:")
# AR keeps printing annoying schema statements
$stdout = StringIO.new
def setup_db
ActiveRecord::Base.logger
ActiveRecord::Schema.define(:version => 1) do
create_table :mixins do |t|
t.column :type, :string
t.column :parent_id, :integer
end
end
end
def teardown_db
ActiveRecord::Base.connection.tables.each do |table|
ActiveRecord::Base.connection.drop_table(table)
end
end
class Mixin < ActiveRecord::Base
end
class TreeMixin < Mixin
acts_as_tree :foreign_key => "parent_id", :order => "id"
end
class TreeMixinWithoutOrder < Mixin
acts_as_tree :foreign_key => "parent_id"
end
class RecursivelyCascadedTreeMixin < Mixin
acts_as_tree :foreign_key => "parent_id"
has_one :first_child, :class_name => 'RecursivelyCascadedTreeMixin', :foreign_key => :parent_id
end
class TreeTest < Test::Unit::TestCase
def setup
setup_db
@root1 = TreeMixin.create!
@root_child1 = TreeMixin.create! :parent_id => @root1.id
@child1_child = TreeMixin.create! :parent_id => @root_child1.id
@root_child2 = TreeMixin.create! :parent_id => @root1.id
@root2 = TreeMixin.create!
@root3 = TreeMixin.create!
end
def teardown
teardown_db
end
def test_children
assert_equal @root1.children, [@root_child1, @root_child2]
assert_equal @root_child1.children, [@child1_child]
assert_equal @child1_child.children, []
assert_equal @root_child2.children, []
end
def test_parent
assert_equal @root_child1.parent, @root1
assert_equal @root_child1.parent, @root_child2.parent
assert_nil @root1.parent
end
def test_delete
assert_equal 6, TreeMixin.count
@root1.destroy
assert_equal 2, TreeMixin.count
@root2.destroy
@root3.destroy
assert_equal 0, TreeMixin.count
end
def test_insert
@extra = @root1.children.create
assert @extra
assert_equal @extra.parent, @root1
assert_equal 3, @root1.children.size
assert @root1.children.include?(@extra)
assert @root1.children.include?(@root_child1)
assert @root1.children.include?(@root_child2)
end
def test_ancestors
assert_equal [], @root1.ancestors
assert_equal [@root1], @root_child1.ancestors
assert_equal [@root_child1, @root1], @child1_child.ancestors
assert_equal [@root1], @root_child2.ancestors
assert_equal [], @root2.ancestors
assert_equal [], @root3.ancestors
end
def test_root
assert_equal @root1, TreeMixin.root
assert_equal @root1, @root1.root
assert_equal @root1, @root_child1.root
assert_equal @root1, @child1_child.root
assert_equal @root1, @root_child2.root
assert_equal @root2, @root2.root
assert_equal @root3, @root3.root
end
def test_roots
assert_equal [@root1, @root2, @root3], TreeMixin.roots
end
def test_siblings
assert_equal [@root2, @root3], @root1.siblings
assert_equal [@root_child2], @root_child1.siblings
assert_equal [], @child1_child.siblings
assert_equal [@root_child1], @root_child2.siblings
assert_equal [@root1, @root3], @root2.siblings
assert_equal [@root1, @root2], @root3.siblings
end
def test_self_and_siblings
assert_equal [@root1, @root2, @root3], @root1.self_and_siblings
assert_equal [@root_child1, @root_child2], @root_child1.self_and_siblings
assert_equal [@child1_child], @child1_child.self_and_siblings
assert_equal [@root_child1, @root_child2], @root_child2.self_and_siblings
assert_equal [@root1, @root2, @root3], @root2.self_and_siblings
assert_equal [@root1, @root2, @root3], @root3.self_and_siblings
end
end
class TreeTestWithEagerLoading < Test::Unit::TestCase
def setup
teardown_db
setup_db
@root1 = TreeMixin.create!
@root_child1 = TreeMixin.create! :parent_id => @root1.id
@child1_child = TreeMixin.create! :parent_id => @root_child1.id
@root_child2 = TreeMixin.create! :parent_id => @root1.id
@root2 = TreeMixin.create!
@root3 = TreeMixin.create!
@rc1 = RecursivelyCascadedTreeMixin.create!
@rc2 = RecursivelyCascadedTreeMixin.create! :parent_id => @rc1.id
@rc3 = RecursivelyCascadedTreeMixin.create! :parent_id => @rc2.id
@rc4 = RecursivelyCascadedTreeMixin.create! :parent_id => @rc3.id
end
def teardown
teardown_db
end
def test_eager_association_loading
roots = TreeMixin.find(:all, :include => :children, :conditions => "mixins.parent_id IS NULL", :order => "mixins.id")
assert_equal [@root1, @root2, @root3], roots
assert_no_queries do
assert_equal 2, roots[0].children.size
assert_equal 0, roots[1].children.size
assert_equal 0, roots[2].children.size
end
end
def test_eager_association_loading_with_recursive_cascading_three_levels_has_many
root_node = RecursivelyCascadedTreeMixin.find(:first, :include => { :children => { :children => :children } }, :order => 'mixins.id')
assert_equal @rc4, assert_no_queries { root_node.children.first.children.first.children.first }
end
def test_eager_association_loading_with_recursive_cascading_three_levels_has_one
root_node = RecursivelyCascadedTreeMixin.find(:first, :include => { :first_child => { :first_child => :first_child } }, :order => 'mixins.id')
assert_equal @rc4, assert_no_queries { root_node.first_child.first_child.first_child }
end
def test_eager_association_loading_with_recursive_cascading_three_levels_belongs_to
leaf_node = RecursivelyCascadedTreeMixin.find(:first, :include => { :parent => { :parent => :parent } }, :order => 'mixins.id DESC')
assert_equal @rc1, assert_no_queries { leaf_node.parent.parent.parent }
end
end
class TreeTestWithoutOrder < Test::Unit::TestCase
def setup
setup_db
@root1 = TreeMixinWithoutOrder.create!
@root2 = TreeMixinWithoutOrder.create!
end
def teardown
teardown_db
end
def test_root
assert [@root1, @root2].include?(TreeMixinWithoutOrder.root)
end
def test_roots
assert_equal [], [@root1, @root2] - TreeMixinWithoutOrder.roots
end
end

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* Exported the changelog of Pagination code for historical reference.
* Imported some patches from Rails Trac (others closed as "wontfix"):
#8176, #7325, #7028, #4113. Documentation is much cleaner now and there
are some new unobtrusive features!
* Extracted Pagination from Rails trunk (r6795)
#
# ChangeLog for /trunk/actionpack/lib/action_controller/pagination.rb
#
# Generated by Trac 0.10.3
# 05/20/07 23:48:02
#
09/03/06 23:28:54 david [4953]
* trunk/actionpack/lib/action_controller/pagination.rb (modified)
Docs and deprecation
08/07/06 12:40:14 bitsweat [4715]
* trunk/actionpack/lib/action_controller/pagination.rb (modified)
Deprecate direct usage of @params. Update ActionView::Base for
instance var deprecation.
06/21/06 02:16:11 rick [4476]
* trunk/actionpack/lib/action_controller/pagination.rb (modified)
Fix indent in pagination documentation. Closes #4990. [Kevin Clark]
04/25/06 17:42:48 marcel [4268]
* trunk/actionpack/lib/action_controller/pagination.rb (modified)
Remove all remaining references to @params in the documentation.
03/16/06 06:38:08 rick [3899]
* trunk/actionpack/lib/action_view/helpers/pagination_helper.rb (modified)
trivial documentation patch for #pagination_links [Francois
Beausoleil] closes #4258
02/20/06 03:15:22 david [3620]
* trunk/actionpack/lib/action_controller/pagination.rb (modified)
* trunk/actionpack/test/activerecord/pagination_test.rb (modified)
* trunk/activerecord/CHANGELOG (modified)
* trunk/activerecord/lib/active_record/base.rb (modified)
* trunk/activerecord/test/base_test.rb (modified)
Added :count option to pagination that'll make it possible for the
ActiveRecord::Base.count call to using something else than * for the
count. Especially important for count queries using DISTINCT #3839
[skaes]. Added :select option to Base.count that'll allow you to
select something else than * to be counted on. Especially important
for count queries using DISTINCT (closes #3839) [skaes].
02/09/06 09:17:40 nzkoz [3553]
* trunk/actionpack/lib/action_controller/pagination.rb (modified)
* trunk/actionpack/test/active_record_unit.rb (added)
* trunk/actionpack/test/activerecord (added)
* trunk/actionpack/test/activerecord/active_record_assertions_test.rb (added)
* trunk/actionpack/test/activerecord/pagination_test.rb (added)
* trunk/actionpack/test/controller/active_record_assertions_test.rb (deleted)
* trunk/actionpack/test/fixtures/companies.yml (added)
* trunk/actionpack/test/fixtures/company.rb (added)
* trunk/actionpack/test/fixtures/db_definitions (added)
* trunk/actionpack/test/fixtures/db_definitions/sqlite.sql (added)
* trunk/actionpack/test/fixtures/developer.rb (added)
* trunk/actionpack/test/fixtures/developers_projects.yml (added)
* trunk/actionpack/test/fixtures/developers.yml (added)
* trunk/actionpack/test/fixtures/project.rb (added)
* trunk/actionpack/test/fixtures/projects.yml (added)
* trunk/actionpack/test/fixtures/replies.yml (added)
* trunk/actionpack/test/fixtures/reply.rb (added)
* trunk/actionpack/test/fixtures/topic.rb (added)
* trunk/actionpack/test/fixtures/topics.yml (added)
* Fix pagination problems when using include
* Introduce Unit Tests for pagination
* Allow count to work with :include by using count distinct.
[Kevin Clark &amp; Jeremy Hopple]
11/05/05 02:10:29 bitsweat [2878]
* trunk/actionpack/lib/action_controller/pagination.rb (modified)
Update paginator docs. Closes #2744.
10/16/05 15:42:03 minam [2649]
* trunk/actionpack/lib/action_controller/pagination.rb (modified)
Update/clean up AP documentation (rdoc)
08/31/05 00:13:10 ulysses [2078]
* trunk/actionpack/CHANGELOG (modified)
* trunk/actionpack/lib/action_controller/pagination.rb (modified)
Add option to specify the singular name used by pagination. Closes
#1960
08/23/05 14:24:15 minam [2041]
* trunk/actionpack/CHANGELOG (modified)
* trunk/actionpack/lib/action_controller/pagination.rb (modified)
Add support for :include with pagination (subject to existing
constraints for :include with :limit and :offset) #1478
[michael@schubert.cx]
07/15/05 20:27:38 david [1839]
* trunk/actionpack/lib/action_controller/pagination.rb (modified)
* trunk/actionpack/lib/action_view/helpers/pagination_helper.rb (modified)
More pagination speed #1334 [Stefan Kaes]
07/14/05 08:02:01 david [1832]
* trunk/actionpack/lib/action_controller/pagination.rb (modified)
* trunk/actionpack/lib/action_view/helpers/pagination_helper.rb (modified)
* trunk/actionpack/test/controller/addresses_render_test.rb (modified)
Made pagination faster #1334 [Stefan Kaes]
04/13/05 05:40:22 david [1159]
* trunk/actionpack/CHANGELOG (modified)
* trunk/actionpack/lib/action_controller/pagination.rb (modified)
* trunk/activerecord/lib/active_record/base.rb (modified)
Fixed pagination to work with joins #1034 [scott@sigkill.org]
04/02/05 09:11:17 david [1067]
* trunk/actionpack/CHANGELOG (modified)
* trunk/actionpack/lib/action_controller/pagination.rb (modified)
* trunk/actionpack/lib/action_controller/scaffolding.rb (modified)
* trunk/actionpack/lib/action_controller/templates/scaffolds/list.rhtml (modified)
* trunk/railties/lib/rails_generator/generators/components/scaffold/templates/controller.rb (modified)
* trunk/railties/lib/rails_generator/generators/components/scaffold/templates/view_list.rhtml (modified)
Added pagination for scaffolding (10 items per page) #964
[mortonda@dgrmm.net]
03/31/05 14:46:11 david [1048]
* trunk/actionpack/lib/action_view/helpers/pagination_helper.rb (modified)
Improved the message display on the exception handler pages #963
[Johan Sorensen]
03/27/05 00:04:07 david [1017]
* trunk/actionpack/CHANGELOG (modified)
* trunk/actionpack/lib/action_view/helpers/pagination_helper.rb (modified)
Fixed that pagination_helper would ignore :params #947 [Sebastian
Kanthak]
03/22/05 13:09:44 david [976]
* trunk/actionpack/lib/action_view/helpers/pagination_helper.rb (modified)
Fixed documentation and prepared for 0.11.0 release
03/21/05 14:35:36 david [967]
* trunk/actionpack/lib/action_controller/pagination.rb (modified)
* trunk/actionpack/lib/action_view/helpers/pagination_helper.rb (modified)
Tweaked the documentation
03/20/05 23:12:05 david [949]
* trunk/actionpack/CHANGELOG (modified)
* trunk/actionpack/lib/action_controller.rb (modified)
* trunk/actionpack/lib/action_controller/pagination.rb (added)
* trunk/actionpack/lib/action_view/helpers/pagination_helper.rb (added)
* trunk/activesupport/lib/active_support/core_ext/kernel.rb (added)
Added pagination support through both a controller and helper add-on
#817 [Sam Stephenson]

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Pagination
==========
To install:
script/plugin install svn://errtheblog.com/svn/plugins/classic_pagination
This code was extracted from Rails trunk after the release 1.2.3.
WARNING: this code is dead. It is unmaintained, untested and full of cruft.
There is a much better pagination plugin called will_paginate.
Install it like this and glance through the README:
script/plugin install svn://errtheblog.com/svn/plugins/will_paginate
It doesn't have the same API, but is in fact much nicer. You can
have both plugins installed until you change your controller/view code that
handles pagination. Then, simply uninstall classic_pagination.

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require 'rake'
require 'rake/testtask'
require 'rake/rdoctask'
desc 'Default: run unit tests.'
task :default => :test
desc 'Test the classic_pagination plugin.'
Rake::TestTask.new(:test) do |t|
t.libs << 'lib'
t.pattern = 'test/**/*_test.rb'
t.verbose = true
end
desc 'Generate documentation for the classic_pagination plugin.'
Rake::RDocTask.new(:rdoc) do |rdoc|
rdoc.rdoc_dir = 'rdoc'
rdoc.title = 'Pagination'
rdoc.options << '--line-numbers' << '--inline-source'
rdoc.rdoc_files.include('README')
rdoc.rdoc_files.include('lib/**/*.rb')
end

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#--
# Copyright (c) 2004-2006 David Heinemeier Hansson
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#++
require 'pagination'
require 'pagination_helper'
ActionController::Base.class_eval do
include ActionController::Pagination
end
ActionView::Base.class_eval do
include ActionView::Helpers::PaginationHelper
end

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puts "\n\n" + File.read(File.dirname(__FILE__) + '/README')

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module ActionController
# === Action Pack pagination for Active Record collections
#
# The Pagination module aids in the process of paging large collections of
# Active Record objects. It offers macro-style automatic fetching of your
# model for multiple views, or explicit fetching for single actions. And if
# the magic isn't flexible enough for your needs, you can create your own
# paginators with a minimal amount of code.
#
# The Pagination module can handle as much or as little as you wish. In the
# controller, have it automatically query your model for pagination; or,
# if you prefer, create Paginator objects yourself.
#
# Pagination is included automatically for all controllers.
#
# For help rendering pagination links, see
# ActionView::Helpers::PaginationHelper.
#
# ==== Automatic pagination for every action in a controller
#
# class PersonController < ApplicationController
# model :person
#
# paginate :people, :order => 'last_name, first_name',
# :per_page => 20
#
# # ...
# end
#
# Each action in this controller now has access to a <tt>@people</tt>
# instance variable, which is an ordered collection of model objects for the
# current page (at most 20, sorted by last name and first name), and a
# <tt>@person_pages</tt> Paginator instance. The current page is determined
# by the <tt>params[:page]</tt> variable.
#
# ==== Pagination for a single action
#
# def list
# @person_pages, @people =
# paginate :people, :order => 'last_name, first_name'
# end
#
# Like the previous example, but explicitly creates <tt>@person_pages</tt>
# and <tt>@people</tt> for a single action, and uses the default of 10 items
# per page.
#
# ==== Custom/"classic" pagination
#
# def list
# @person_pages = Paginator.new self, Person.count, 10, params[:page]
# @people = Person.find :all, :order => 'last_name, first_name',
# :limit => @person_pages.items_per_page,
# :offset => @person_pages.current.offset
# end
#
# Explicitly creates the paginator from the previous example and uses
# Paginator#to_sql to retrieve <tt>@people</tt> from the model.
#
module Pagination
unless const_defined?(:OPTIONS)
# A hash holding options for controllers using macro-style pagination
OPTIONS = Hash.new
# The default options for pagination
DEFAULT_OPTIONS = {
:class_name => nil,
:singular_name => nil,
:per_page => 10,
:conditions => nil,
:order_by => nil,
:order => nil,
:join => nil,
:joins => nil,
:count => nil,
:include => nil,
:select => nil,
:group => nil,
:parameter => 'page'
}
else
DEFAULT_OPTIONS[:group] = nil
end
def self.included(base) #:nodoc:
super
base.extend(ClassMethods)
end
def self.validate_options!(collection_id, options, in_action) #:nodoc:
options.merge!(DEFAULT_OPTIONS) {|key, old, new| old}
valid_options = DEFAULT_OPTIONS.keys
valid_options << :actions unless in_action
unknown_option_keys = options.keys - valid_options
raise ActionController::ActionControllerError,
"Unknown options: #{unknown_option_keys.join(', ')}" unless
unknown_option_keys.empty?
options[:singular_name] ||= Inflector.singularize(collection_id.to_s)
options[:class_name] ||= Inflector.camelize(options[:singular_name])
end
# Returns a paginator and a collection of Active Record model instances
# for the paginator's current page. This is designed to be used in a
# single action; to automatically paginate multiple actions, consider
# ClassMethods#paginate.
#
# +options+ are:
# <tt>:singular_name</tt>:: the singular name to use, if it can't be inferred by singularizing the collection name
# <tt>:class_name</tt>:: the class name to use, if it can't be inferred by
# camelizing the singular name
# <tt>:per_page</tt>:: the maximum number of items to include in a
# single page. Defaults to 10
# <tt>:conditions</tt>:: optional conditions passed to Model.find(:all, *params) and
# Model.count
# <tt>:order</tt>:: optional order parameter passed to Model.find(:all, *params)
# <tt>:order_by</tt>:: (deprecated, used :order) optional order parameter passed to Model.find(:all, *params)
# <tt>:joins</tt>:: optional joins parameter passed to Model.find(:all, *params)
# and Model.count
# <tt>:join</tt>:: (deprecated, used :joins or :include) optional join parameter passed to Model.find(:all, *params)
# and Model.count
# <tt>:include</tt>:: optional eager loading parameter passed to Model.find(:all, *params)
# and Model.count
# <tt>:select</tt>:: :select parameter passed to Model.find(:all, *params)
#
# <tt>:count</tt>:: parameter passed as :select option to Model.count(*params)
#
# <tt>:group</tt>:: :group parameter passed to Model.find(:all, *params). It forces the use of DISTINCT instead of plain COUNT to come up with the total number of records
#
def paginate(collection_id, options={})
Pagination.validate_options!(collection_id, options, true)
paginator_and_collection_for(collection_id, options)
end
# These methods become class methods on any controller
module ClassMethods
# Creates a +before_filter+ which automatically paginates an Active
# Record model for all actions in a controller (or certain actions if
# specified with the <tt>:actions</tt> option).
#
# +options+ are the same as PaginationHelper#paginate, with the addition
# of:
# <tt>:actions</tt>:: an array of actions for which the pagination is
# active. Defaults to +nil+ (i.e., every action)
def paginate(collection_id, options={})
Pagination.validate_options!(collection_id, options, false)
module_eval do
before_filter :create_paginators_and_retrieve_collections
OPTIONS[self] ||= Hash.new
OPTIONS[self][collection_id] = options
end
end
end
def create_paginators_and_retrieve_collections #:nodoc:
Pagination::OPTIONS[self.class].each do |collection_id, options|
next unless options[:actions].include? action_name if
options[:actions]
paginator, collection =
paginator_and_collection_for(collection_id, options)
paginator_name = "@#{options[:singular_name]}_pages"
self.instance_variable_set(paginator_name, paginator)
collection_name = "@#{collection_id.to_s}"
self.instance_variable_set(collection_name, collection)
end
end
# Returns the total number of items in the collection to be paginated for
# the +model+ and given +conditions+. Override this method to implement a
# custom counter.
def count_collection_for_pagination(model, options)
model.count(:conditions => options[:conditions],
:joins => options[:join] || options[:joins],
:include => options[:include],
:select => (options[:group] ? "DISTINCT #{options[:group]}" : options[:count]))
end
# Returns a collection of items for the given +model+ and +options[conditions]+,
# ordered by +options[order]+, for the current page in the given +paginator+.
# Override this method to implement a custom finder.
def find_collection_for_pagination(model, options, paginator)
model.find(:all, :conditions => options[:conditions],
:order => options[:order_by] || options[:order],
:joins => options[:join] || options[:joins], :include => options[:include],
:select => options[:select], :limit => options[:per_page],
:group => options[:group], :offset => paginator.current.offset)
end
protected :create_paginators_and_retrieve_collections,
:count_collection_for_pagination,
:find_collection_for_pagination
def paginator_and_collection_for(collection_id, options) #:nodoc:
klass = options[:class_name].constantize
page = params[options[:parameter]]
count = count_collection_for_pagination(klass, options)
paginator = Paginator.new(self, count, options[:per_page], page)
collection = find_collection_for_pagination(klass, options, paginator)
return paginator, collection
end
private :paginator_and_collection_for
# A class representing a paginator for an Active Record collection.
class Paginator
include Enumerable
# Creates a new Paginator on the given +controller+ for a set of items
# of size +item_count+ and having +items_per_page+ items per page.
# Raises ArgumentError if items_per_page is out of bounds (i.e., less
# than or equal to zero). The page CGI parameter for links defaults to
# "page" and can be overridden with +page_parameter+.
def initialize(controller, item_count, items_per_page, current_page=1)
raise ArgumentError, 'must have at least one item per page' if
items_per_page <= 0
@controller = controller
@item_count = item_count || 0
@items_per_page = items_per_page
@pages = {}
self.current_page = current_page
end
attr_reader :controller, :item_count, :items_per_page
# Sets the current page number of this paginator. If +page+ is a Page
# object, its +number+ attribute is used as the value; if the page does
# not belong to this Paginator, an ArgumentError is raised.
def current_page=(page)
if page.is_a? Page
raise ArgumentError, 'Page/Paginator mismatch' unless
page.paginator == self
end
page = page.to_i
@current_page_number = has_page_number?(page) ? page : 1
end
# Returns a Page object representing this paginator's current page.
def current_page
@current_page ||= self[@current_page_number]
end
alias current :current_page
# Returns a new Page representing the first page in this paginator.
def first_page
@first_page ||= self[1]
end
alias first :first_page
# Returns a new Page representing the last page in this paginator.
def last_page
@last_page ||= self[page_count]
end
alias last :last_page
# Returns the number of pages in this paginator.
def page_count
@page_count ||= @item_count.zero? ? 1 :
(q,r=@item_count.divmod(@items_per_page); r==0? q : q+1)
end
alias length :page_count
# Returns true if this paginator contains the page of index +number+.
def has_page_number?(number)
number >= 1 and number <= page_count
end
# Returns a new Page representing the page with the given index
# +number+.
def [](number)
@pages[number] ||= Page.new(self, number)
end
# Successively yields all the paginator's pages to the given block.
def each(&block)
page_count.times do |n|
yield self[n+1]
end
end
# A class representing a single page in a paginator.
class Page
include Comparable
# Creates a new Page for the given +paginator+ with the index
# +number+. If +number+ is not in the range of valid page numbers or
# is not a number at all, it defaults to 1.
def initialize(paginator, number)
@paginator = paginator
@number = number.to_i
@number = 1 unless @paginator.has_page_number? @number
end
attr_reader :paginator, :number
alias to_i :number
# Compares two Page objects and returns true when they represent the
# same page (i.e., their paginators are the same and they have the
# same page number).
def ==(page)
return false if page.nil?
@paginator == page.paginator and
@number == page.number
end
# Compares two Page objects and returns -1 if the left-hand page comes
# before the right-hand page, 0 if the pages are equal, and 1 if the
# left-hand page comes after the right-hand page. Raises ArgumentError
# if the pages do not belong to the same Paginator object.
def <=>(page)
raise ArgumentError unless @paginator == page.paginator
@number <=> page.number
end
# Returns the item offset for the first item in this page.
def offset
@paginator.items_per_page * (@number - 1)
end
# Returns the number of the first item displayed.
def first_item
offset + 1
end
# Returns the number of the last item displayed.
def last_item
[@paginator.items_per_page * @number, @paginator.item_count].min
end
# Returns true if this page is the first page in the paginator.
def first?
self == @paginator.first
end
# Returns true if this page is the last page in the paginator.
def last?
self == @paginator.last
end
# Returns a new Page object representing the page just before this
# page, or nil if this is the first page.
def previous
if first? then nil else @paginator[@number - 1] end
end
# Returns a new Page object representing the page just after this
# page, or nil if this is the last page.
def next
if last? then nil else @paginator[@number + 1] end
end
# Returns a new Window object for this page with the specified
# +padding+.
def window(padding=2)
Window.new(self, padding)
end
# Returns the limit/offset array for this page.
def to_sql
[@paginator.items_per_page, offset]
end
def to_param #:nodoc:
@number.to_s
end
end
# A class for representing ranges around a given page.
class Window
# Creates a new Window object for the given +page+ with the specified
# +padding+.
def initialize(page, padding=2)
@paginator = page.paginator
@page = page
self.padding = padding
end
attr_reader :paginator, :page
# Sets the window's padding (the number of pages on either side of the
# window page).
def padding=(padding)
@padding = padding < 0 ? 0 : padding
# Find the beginning and end pages of the window
@first = @paginator.has_page_number?(@page.number - @padding) ?
@paginator[@page.number - @padding] : @paginator.first
@last = @paginator.has_page_number?(@page.number + @padding) ?
@paginator[@page.number + @padding] : @paginator.last
end
attr_reader :padding, :first, :last
# Returns an array of Page objects in the current window.
def pages
(@first.number..@last.number).to_a.collect! {|n| @paginator[n]}
end
alias to_a :pages
end
end
end
end

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module ActionView
module Helpers
# Provides methods for linking to ActionController::Pagination objects using a simple generator API. You can optionally
# also build your links manually using ActionView::Helpers::AssetHelper#link_to like so:
#
# <%= link_to "Previous page", { :page => paginator.current.previous } if paginator.current.previous %>
# <%= link_to "Next page", { :page => paginator.current.next } if paginator.current.next %>
module PaginationHelper
unless const_defined?(:DEFAULT_OPTIONS)
DEFAULT_OPTIONS = {
:name => :page,
:window_size => 2,
:always_show_anchors => true,
:link_to_current_page => false,
:params => {}
}
end
# Creates a basic HTML link bar for the given +paginator+. Links will be created
# for the next and/or previous page and for a number of other pages around the current
# pages position. The +html_options+ hash is passed to +link_to+ when the links are created.
#
# ==== Options
# <tt>:name</tt>:: the routing name for this paginator
# (defaults to +page+)
# <tt>:prefix</tt>:: prefix for pagination links
# (i.e. Older Pages: 1 2 3 4)
# <tt>:suffix</tt>:: suffix for pagination links
# (i.e. 1 2 3 4 <- Older Pages)
# <tt>:window_size</tt>:: the number of pages to show around
# the current page (defaults to <tt>2</tt>)
# <tt>:always_show_anchors</tt>:: whether or not the first and last
# pages should always be shown
# (defaults to +true+)
# <tt>:link_to_current_page</tt>:: whether or not the current page
# should be linked to (defaults to
# +false+)
# <tt>:params</tt>:: any additional routing parameters
# for page URLs
#
# ==== Examples
# # We'll assume we have a paginator setup in @person_pages...
#
# pagination_links(@person_pages)
# # => 1 <a href="/?page=2/">2</a> <a href="/?page=3/">3</a> ... <a href="/?page=10/">10</a>
#
# pagination_links(@person_pages, :link_to_current_page => true)
# # => <a href="/?page=1/">1</a> <a href="/?page=2/">2</a> <a href="/?page=3/">3</a> ... <a href="/?page=10/">10</a>
#
# pagination_links(@person_pages, :always_show_anchors => false)
# # => 1 <a href="/?page=2/">2</a> <a href="/?page=3/">3</a>
#
# pagination_links(@person_pages, :window_size => 1)
# # => 1 <a href="/?page=2/">2</a> ... <a href="/?page=10/">10</a>
#
# pagination_links(@person_pages, :params => { :viewer => "flash" })
# # => 1 <a href="/?page=2&amp;viewer=flash/">2</a> <a href="/?page=3&amp;viewer=flash/">3</a> ...
# # <a href="/?page=10&amp;viewer=flash/">10</a>
def pagination_links(paginator, options={}, html_options={})
name = options[:name] || DEFAULT_OPTIONS[:name]
params = (options[:params] || DEFAULT_OPTIONS[:params]).clone
prefix = options[:prefix] || ''
suffix = options[:suffix] || ''
pagination_links_each(paginator, options, prefix, suffix) do |n|
params[name] = n
link_to(n.to_s, params, html_options)
end
end
# Iterate through the pages of a given +paginator+, invoking a
# block for each page number that needs to be rendered as a link.
#
# ==== Options
# <tt>:window_size</tt>:: the number of pages to show around
# the current page (defaults to +2+)
# <tt>:always_show_anchors</tt>:: whether or not the first and last
# pages should always be shown
# (defaults to +true+)
# <tt>:link_to_current_page</tt>:: whether or not the current page
# should be linked to (defaults to
# +false+)
#
# ==== Example
# # Turn paginated links into an Ajax call
# pagination_links_each(paginator, page_options) do |link|
# options = { :url => {:action => 'list'}, :update => 'results' }
# html_options = { :href => url_for(:action => 'list') }
#
# link_to_remote(link.to_s, options, html_options)
# end
def pagination_links_each(paginator, options, prefix = nil, suffix = nil)
options = DEFAULT_OPTIONS.merge(options)
link_to_current_page = options[:link_to_current_page]
always_show_anchors = options[:always_show_anchors]
current_page = paginator.current_page
window_pages = current_page.window(options[:window_size]).pages
return if window_pages.length <= 1 unless link_to_current_page
first, last = paginator.first, paginator.last
html = ''
html << prefix if prefix
if always_show_anchors and not (wp_first = window_pages[0]).first?
html << yield(first.number)
html << ' ... ' if wp_first.number - first.number > 1
html << ' '
end
window_pages.each do |page|
if current_page == page && !link_to_current_page
html << page.number.to_s
else
html << yield(page.number)
end
html << ' '
end
if always_show_anchors and not (wp_last = window_pages[-1]).last?
html << ' ... ' if last.number - wp_last.number > 1
html << yield(last.number)
end
html << suffix if suffix
html
end
end # PaginationHelper
end # Helpers
end # ActionView

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thirty_seven_signals:
id: 1
name: 37Signals
rating: 4
TextDrive:
id: 2
name: TextDrive
rating: 4
PlanetArgon:
id: 3
name: Planet Argon
rating: 4
Google:
id: 4
name: Google
rating: 4
Ionist:
id: 5
name: Ioni.st
rating: 4

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class Company < ActiveRecord::Base
attr_protected :rating
set_sequence_name :companies_nonstd_seq
validates_presence_of :name
def validate
errors.add('rating', 'rating should not be 2') if rating == 2
end
end

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class Developer < ActiveRecord::Base
has_and_belongs_to_many :projects
end
class DeVeLoPeR < ActiveRecord::Base
set_table_name "developers"
end

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david:
id: 1
name: David
salary: 80000
jamis:
id: 2
name: Jamis
salary: 150000
<% for digit in 3..10 %>
dev_<%= digit %>:
id: <%= digit %>
name: fixture_<%= digit %>
salary: 100000
<% end %>
poor_jamis:
id: 11
name: Jamis
salary: 9000

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david_action_controller:
developer_id: 1
project_id: 2
joined_on: 2004-10-10
david_active_record:
developer_id: 1
project_id: 1
joined_on: 2004-10-10
jamis_active_record:
developer_id: 2
project_id: 1

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class Project < ActiveRecord::Base
has_and_belongs_to_many :developers, :uniq => true
end

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action_controller:
id: 2
name: Active Controller
active_record:
id: 1
name: Active Record

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witty_retort:
id: 1
topic_id: 1
content: Birdman is better!
created_at: <%= 6.hours.ago.to_s(:db) %>
updated_at: nil
another:
id: 2
topic_id: 2
content: Nuh uh!
created_at: <%= 1.hour.ago.to_s(:db) %>
updated_at: nil

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class Reply < ActiveRecord::Base
belongs_to :topic, :include => [:replies]
validates_presence_of :content
end

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CREATE TABLE 'companies' (
'id' INTEGER PRIMARY KEY NOT NULL,
'name' TEXT DEFAULT NULL,
'rating' INTEGER DEFAULT 1
);
CREATE TABLE 'replies' (
'id' INTEGER PRIMARY KEY NOT NULL,
'content' text,
'created_at' datetime,
'updated_at' datetime,
'topic_id' integer
);
CREATE TABLE 'topics' (
'id' INTEGER PRIMARY KEY NOT NULL,
'title' varchar(255),
'subtitle' varchar(255),
'content' text,
'created_at' datetime,
'updated_at' datetime
);
CREATE TABLE 'developers' (
'id' INTEGER PRIMARY KEY NOT NULL,
'name' TEXT DEFAULT NULL,
'salary' INTEGER DEFAULT 70000,
'created_at' DATETIME DEFAULT NULL,
'updated_at' DATETIME DEFAULT NULL
);
CREATE TABLE 'projects' (
'id' INTEGER PRIMARY KEY NOT NULL,
'name' TEXT DEFAULT NULL
);
CREATE TABLE 'developers_projects' (
'developer_id' INTEGER NOT NULL,
'project_id' INTEGER NOT NULL,
'joined_on' DATE DEFAULT NULL,
'access_level' INTEGER DEFAULT 1
);

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class Topic < ActiveRecord::Base
has_many :replies, :include => [:user], :dependent => :destroy
end

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futurama:
id: 1
title: Isnt futurama awesome?
subtitle: It really is, isnt it.
content: I like futurama
created_at: <%= 1.day.ago.to_s(:db) %>
updated_at:
harvey_birdman:
id: 2
title: Harvey Birdman is the king of all men
subtitle: yup
content: It really is
created_at: <%= 2.hours.ago.to_s(:db) %>
updated_at:
rails:
id: 3
title: Rails is nice
subtitle: It makes me happy
content: except when I have to hack internals to fix pagination. even then really.
created_at: <%= 20.minutes.ago.to_s(:db) %>

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require 'test/unit'
unless defined?(ActiveRecord)
plugin_root = File.join(File.dirname(__FILE__), '..')
# first look for a symlink to a copy of the framework
if framework_root = ["#{plugin_root}/rails", "#{plugin_root}/../../rails"].find { |p| File.directory? p }
puts "found framework root: #{framework_root}"
# this allows for a plugin to be tested outside an app
$:.unshift "#{framework_root}/activesupport/lib", "#{framework_root}/activerecord/lib", "#{framework_root}/actionpack/lib"
else
# is the plugin installed in an application?
app_root = plugin_root + '/../../..'
if File.directory? app_root + '/config'
puts 'using config/boot.rb'
ENV['RAILS_ENV'] = 'test'
require File.expand_path(app_root + '/config/boot')
else
# simply use installed gems if available
puts 'using rubygems'
require 'rubygems'
gem 'actionpack'; gem 'activerecord'
end
end
%w(action_pack active_record action_controller active_record/fixtures action_controller/test_process).each {|f| require f}
Dependencies.load_paths.unshift "#{plugin_root}/lib"
end
# Define the connector
class ActiveRecordTestConnector
cattr_accessor :able_to_connect
cattr_accessor :connected
# Set our defaults
self.connected = false
self.able_to_connect = true
class << self
def setup
unless self.connected || !self.able_to_connect
setup_connection
load_schema
require_fixture_models
self.connected = true
end
rescue Exception => e # errors from ActiveRecord setup
$stderr.puts "\nSkipping ActiveRecord assertion tests: #{e}"
#$stderr.puts " #{e.backtrace.join("\n ")}\n"
self.able_to_connect = false
end
private
def setup_connection
if Object.const_defined?(:ActiveRecord)
defaults = { :database => ':memory:' }
begin
options = defaults.merge :adapter => 'sqlite3', :timeout => 500
ActiveRecord::Base.establish_connection(options)
ActiveRecord::Base.configurations = { 'sqlite3_ar_integration' => options }
ActiveRecord::Base.connection
rescue Exception # errors from establishing a connection
$stderr.puts 'SQLite 3 unavailable; trying SQLite 2.'
options = defaults.merge :adapter => 'sqlite'
ActiveRecord::Base.establish_connection(options)
ActiveRecord::Base.configurations = { 'sqlite2_ar_integration' => options }
ActiveRecord::Base.connection
end
Object.send(:const_set, :QUOTED_TYPE, ActiveRecord::Base.connection.quote_column_name('type')) unless Object.const_defined?(:QUOTED_TYPE)
else
raise "Can't setup connection since ActiveRecord isn't loaded."
end
end
# Load actionpack sqlite tables
def load_schema
File.read(File.dirname(__FILE__) + "/fixtures/schema.sql").split(';').each do |sql|
ActiveRecord::Base.connection.execute(sql) unless sql.blank?
end
end
def require_fixture_models
Dir.glob(File.dirname(__FILE__) + "/fixtures/*.rb").each {|f| require f}
end
end
end
# Test case for inheritance
class ActiveRecordTestCase < Test::Unit::TestCase
# Set our fixture path
if ActiveRecordTestConnector.able_to_connect
self.fixture_path = "#{File.dirname(__FILE__)}/fixtures/"
self.use_transactional_fixtures = false
end
def self.fixtures(*args)
super if ActiveRecordTestConnector.connected
end
def run(*args)
super if ActiveRecordTestConnector.connected
end
# Default so Test::Unit::TestCase doesn't complain
def test_truth
end
end
ActiveRecordTestConnector.setup
ActionController::Routing::Routes.reload rescue nil
ActionController::Routing::Routes.draw do |map|
map.connect ':controller/:action/:id'
end

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require File.dirname(__FILE__) + '/helper'
require File.dirname(__FILE__) + '/../init'
class PaginationHelperTest < Test::Unit::TestCase
include ActionController::Pagination
include ActionView::Helpers::PaginationHelper
include ActionView::Helpers::UrlHelper
include ActionView::Helpers::TagHelper
def setup
@controller = Class.new do
attr_accessor :url, :request
def url_for(options, *parameters_for_method_reference)
url
end
end
@controller = @controller.new
@controller.url = "http://www.example.com"
end
def test_pagination_links
total, per_page, page = 30, 10, 1
output = pagination_links Paginator.new(@controller, total, per_page, page)
assert_equal "1 <a href=\"http://www.example.com\">2</a> <a href=\"http://www.example.com\">3</a> ", output
end
def test_pagination_links_with_prefix
total, per_page, page = 30, 10, 1
output = pagination_links Paginator.new(@controller, total, per_page, page), :prefix => 'Newer '
assert_equal "Newer 1 <a href=\"http://www.example.com\">2</a> <a href=\"http://www.example.com\">3</a> ", output
end
def test_pagination_links_with_suffix
total, per_page, page = 30, 10, 1
output = pagination_links Paginator.new(@controller, total, per_page, page), :suffix => 'Older'
assert_equal "1 <a href=\"http://www.example.com\">2</a> <a href=\"http://www.example.com\">3</a> Older", output
end
end

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require File.dirname(__FILE__) + '/helper'
require File.dirname(__FILE__) + '/../init'
class PaginationTest < ActiveRecordTestCase
fixtures :topics, :replies, :developers, :projects, :developers_projects
class PaginationController < ActionController::Base
if respond_to? :view_paths=
self.view_paths = [ "#{File.dirname(__FILE__)}/../fixtures/" ]
else
self.template_root = [ "#{File.dirname(__FILE__)}/../fixtures/" ]
end
def simple_paginate
@topic_pages, @topics = paginate(:topics)
render :nothing => true
end
def paginate_with_per_page
@topic_pages, @topics = paginate(:topics, :per_page => 1)
render :nothing => true
end
def paginate_with_order
@topic_pages, @topics = paginate(:topics, :order => 'created_at asc')
render :nothing => true
end
def paginate_with_order_by
@topic_pages, @topics = paginate(:topics, :order_by => 'created_at asc')
render :nothing => true
end
def paginate_with_include_and_order
@topic_pages, @topics = paginate(:topics, :include => :replies, :order => 'replies.created_at asc, topics.created_at asc')
render :nothing => true
end
def paginate_with_conditions
@topic_pages, @topics = paginate(:topics, :conditions => ["created_at > ?", 30.minutes.ago])
render :nothing => true
end
def paginate_with_class_name
@developer_pages, @developers = paginate(:developers, :class_name => "DeVeLoPeR")
render :nothing => true
end
def paginate_with_singular_name
@developer_pages, @developers = paginate()
render :nothing => true
end
def paginate_with_joins
@developer_pages, @developers = paginate(:developers,
:joins => 'LEFT JOIN developers_projects ON developers.id = developers_projects.developer_id',
:conditions => 'project_id=1')
render :nothing => true
end
def paginate_with_join
@developer_pages, @developers = paginate(:developers,
:join => 'LEFT JOIN developers_projects ON developers.id = developers_projects.developer_id',
:conditions => 'project_id=1')
render :nothing => true
end
def paginate_with_join_and_count
@developer_pages, @developers = paginate(:developers,
:join => 'd LEFT JOIN developers_projects ON d.id = developers_projects.developer_id',
:conditions => 'project_id=1',
:count => "d.id")
render :nothing => true
end
def paginate_with_join_and_group
@developer_pages, @developers = paginate(:developers,
:join => 'INNER JOIN developers_projects ON developers.id = developers_projects.developer_id',
:group => 'developers.id')
render :nothing => true
end
def rescue_errors(e) raise e end
def rescue_action(e) raise end
end
def setup
@controller = PaginationController.new
@request = ActionController::TestRequest.new
@response = ActionController::TestResponse.new
super
end
# Single Action Pagination Tests
def test_simple_paginate
get :simple_paginate
assert_equal 1, assigns(:topic_pages).page_count
assert_equal 3, assigns(:topics).size
end
def test_paginate_with_per_page
get :paginate_with_per_page
assert_equal 1, assigns(:topics).size
assert_equal 3, assigns(:topic_pages).page_count
end
def test_paginate_with_order
get :paginate_with_order
expected = [topics(:futurama),
topics(:harvey_birdman),
topics(:rails)]
assert_equal expected, assigns(:topics)
assert_equal 1, assigns(:topic_pages).page_count
end
def test_paginate_with_order_by
get :paginate_with_order
expected = assigns(:topics)
get :paginate_with_order_by
assert_equal expected, assigns(:topics)
assert_equal 1, assigns(:topic_pages).page_count
end
def test_paginate_with_conditions
get :paginate_with_conditions
expected = [topics(:rails)]
assert_equal expected, assigns(:topics)
assert_equal 1, assigns(:topic_pages).page_count
end
def test_paginate_with_class_name
get :paginate_with_class_name
assert assigns(:developers).size > 0
assert_equal DeVeLoPeR, assigns(:developers).first.class
end
def test_paginate_with_joins
get :paginate_with_joins
assert_equal 2, assigns(:developers).size
developer_names = assigns(:developers).map { |d| d.name }
assert developer_names.include?('David')
assert developer_names.include?('Jamis')
end
def test_paginate_with_join_and_conditions
get :paginate_with_joins
expected = assigns(:developers)
get :paginate_with_join
assert_equal expected, assigns(:developers)
end
def test_paginate_with_join_and_count
get :paginate_with_joins
expected = assigns(:developers)
get :paginate_with_join_and_count
assert_equal expected, assigns(:developers)
end
def test_paginate_with_include_and_order
get :paginate_with_include_and_order
expected = Topic.find(:all, :include => 'replies', :order => 'replies.created_at asc, topics.created_at asc', :limit => 10)
assert_equal expected, assigns(:topics)
end
def test_paginate_with_join_and_group
get :paginate_with_join_and_group
assert_equal 2, assigns(:developers).size
assert_equal 2, assigns(:developer_pages).item_count
developer_names = assigns(:developers).map { |d| d.name }
assert developer_names.include?('David')
assert developer_names.include?('Jamis')
end
end