From f085508121efdcda7f59fb9408dd998ea825d881 Mon Sep 17 00:00:00 2001
From: Toshi MARUYAMA <marutosijp2@yahoo.co.jp>
Date: Tue, 21 May 2013 13:42:34 +0000
Subject: [PATCH] gantt: sort versions by start date (#7335)

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11898 e93f8b46-1217-0410-a6f0-8f06a7374b81
---
 lib/redmine/helpers/gantt.rb                |  9 ++++++++
 test/unit/lib/redmine/helpers/gantt_test.rb | 25 +++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/lib/redmine/helpers/gantt.rb b/lib/redmine/helpers/gantt.rb
index e8e7ac458..1625801f9 100644
--- a/lib/redmine/helpers/gantt.rb
+++ b/lib/redmine/helpers/gantt.rb
@@ -220,6 +220,7 @@ module Redmine
           return if abort?
         end
         versions = project_versions(project)
+        self.class.sort_versions!(versions)
         versions.each do |version|
           render_version(project, version, options)
         end
@@ -690,6 +691,14 @@ module Redmine
         ancesters_start_date
       end
 
+      def self.sort_versions!(versions)
+        versions.sort! {|a, b| sort_version_logic(a) <=> sort_version_logic(b)}
+      end
+
+      def self.sort_version_logic(version)
+        [(version.start_date || Date.new()), version.id]
+      end
+
       def current_limit
         if @max_rows
           @max_rows - @number_of_rows
diff --git a/test/unit/lib/redmine/helpers/gantt_test.rb b/test/unit/lib/redmine/helpers/gantt_test.rb
index d427ce707..1c46c6098 100644
--- a/test/unit/lib/redmine/helpers/gantt_test.rb
+++ b/test/unit/lib/redmine/helpers/gantt_test.rb
@@ -828,4 +828,29 @@ class Redmine::Helpers::GanttHelperTest < ActionView::TestCase
                   issue1_child1_child2.id, issue1_child1_child1.id, issue2.id],
                  issues.map{|v| v.id}
   end
+
+  def test_sort_versions
+    project = Project.generate!
+    version1 = Version.create!(:project => project, :name => 'test1')
+    version2 = Version.create!(:project => project, :name => 'test2')
+    version3 = Version.create!(:project => project, :name => 'test3')
+    version4 = Version.create!(:project => project, :name => 'test4')
+    issue1 = Issue.generate!(:subject => "test", :project => project,
+                             :fixed_version => version1)
+    issue2 = Issue.generate!(:subject => "test", :project => project,
+                             :fixed_version => version2)
+    issue3 = Issue.generate!(:subject => "test", :project => project,
+                             :fixed_version => version3, :start_date => (today - 1))
+    issue4 = Issue.generate!(:subject => "test", :project => project,
+                             :fixed_version => version4, :start_date => (today - 2))
+    assert_nil version1.start_date
+    assert_nil version2.start_date
+    assert version1.id < version2.id
+    assert_equal today - 1, version3.start_date
+    assert_equal today - 2, version4.start_date
+    versions = [version4, version3, version2, version1]
+    Redmine::Helpers::Gantt.sort_versions!(versions)
+    assert_equal [version1.id, version2.id, version4.id, version3.id],
+                  versions.map{|v| v.id}
+  end
 end