When moving an issue to another project, reassign it to the category with same name if any (#1653).

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1697 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/issue.rb

@@ -77,7 +77,9 @@ class Issue < ActiveRecord::Base
           self.relations_to.clear
         end
         # issue is moved to another project
-        self.category = nil 
+        # reassign to the category with same name if any
+        new_category = category.nil? ? nil : new_project.issue_categories.find_by_name(category.name)
+        self.category = new_category
         self.fixed_version = nil
         self.project = new_project
       end

test/fixtures/issue_categories.yml

@@ -14,4 +14,9 @@ issue_categories_003:
   project_id: 2
   assigned_to_id: 
   id: 3
+issue_categories_004: 
+  name: Printing
+  project_id: 2
+  assigned_to_id: 
+  id: 4
   

test/unit/issue_test.rb

@@ -165,17 +165,26 @@ class IssueTest < Test::Unit::TestCase
     assert !issue1.reload.closed?
   end
   
-  def test_move_to_another_project
+  def test_move_to_another_project_with_same_category
     issue = Issue.find(1)
     assert issue.move_to(Project.find(2))
     issue.reload
     assert_equal 2, issue.project_id
-    # Category removed
-    assert_nil issue.category
+    # Category changes
+    assert_equal 4, issue.category_id
     # Make sure time entries were move to the target project
     assert_equal 2, issue.time_entries.first.project_id
   end
   
+  def test_move_to_another_project_without_same_category
+    issue = Issue.find(2)
+    assert issue.move_to(Project.find(2))
+    issue.reload
+    assert_equal 2, issue.project_id
+    # Category cleared
+    assert_nil issue.category_id
+  end
+  
   def test_issue_destroy
     Issue.find(1).destroy
     assert_nil Issue.find_by_id(1)