Internal error when moving an issue to a project without trackers (#20463).

git-svn-id: http://svn.redmine.org/redmine/trunk@14612 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/issue.rb

@@ -873,6 +873,11 @@ class Issue < ActiveRecord::Base
     end
   end
 
+  # Returns the original tracker
+  def tracker_was
+    Tracker.find_by_id(tracker_id_was)
+  end
+
   # Returns the users that should be notified
   def notified_users
     notified = []

app/views/issues/edit.html.erb

@@ -1,4 +1,4 @@
-<h2><%= "#{@issue.tracker.name} ##{@issue.id}" %></h2>
+<h2><%= "#{@issue.tracker_was} ##{@issue.id}" %></h2>
 
 <%= render :partial => 'edit' %>
 <% content_for :header_tags do %>

test/functional/issues_controller_test.rb

@@ -3057,6 +3057,17 @@ class IssuesControllerTest < ActionController::TestCase
     assert_mail_body_match "Project changed from eCookbook to OnlineStore", mail
   end
 
+  def test_put_update_trying_to_move_issue_to_project_without_tracker_should_not_error
+    target = Project.generate!(:tracker_ids => [])
+    assert target.trackers.empty?
+    issue = Issue.generate!
+    @request.session[:user_id] = 1
+
+    put :update, :id => issue.id, :issue => {:project_id => target.id}
+    assert_response :success
+    assert_template 'edit'
+  end
+
   def test_put_update_with_tracker_change
     @request.session[:user_id] = 2
     ActionMailer::Base.deliveries.clear