From 387836f8aa736eba4dfe0da879ad71bbc19dd224 Mon Sep 17 00:00:00 2001
From: Jean-Philippe Lang <jp_lang@yahoo.fr>
Date: Sat, 21 Jul 2012 15:43:44 +0000
Subject: [PATCH] Fixed that settings raises an error if not trackers exist
 (#11467).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@10067 e93f8b46-1217-0410-a6f0-8f06a7374b81
---
 app/models/tracker.rb                       | 12 ++++++++++--
 test/functional/settings_controller_test.rb |  7 +++++++
 test/unit/tracker_test.rb                   |  5 +++++
 3 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/app/models/tracker.rb b/app/models/tracker.rb
index 472b94b31..9b3f6afe6 100644
--- a/app/models/tracker.rb
+++ b/app/models/tracker.rb
@@ -92,12 +92,20 @@ class Tracker < ActiveRecord::Base
 
   # Returns the fields that are disabled for all the given trackers
   def self.disabled_core_fields(trackers)
-    trackers.uniq.map(&:disabled_core_fields).reduce(:&)
+    if trackers.present?
+      trackers.uniq.map(&:disabled_core_fields).reduce(:&)
+    else
+      []
+    end
   end
 
   # Returns the fields that are enabled for one tracker at least
   def self.core_fields(trackers)
-    trackers.uniq.map(&:core_fields).reduce(:|)
+    if trackers.present?
+      trackers.uniq.map(&:core_fields).reduce(:|)
+    else
+      CORE_FIELDS.dup
+    end
   end
 
 private
diff --git a/test/functional/settings_controller_test.rb b/test/functional/settings_controller_test.rb
index deddabea5..034b902d0 100644
--- a/test/functional/settings_controller_test.rb
+++ b/test/functional/settings_controller_test.rb
@@ -66,6 +66,13 @@ class SettingsControllerTest < ActionController::TestCase
     end
   end
 
+  def test_get_edit_without_trackers_should_succeed
+    Tracker.delete_all
+
+    get :edit
+    assert_response :success
+  end
+
   def test_post_edit_notifications
     post :edit, :settings => {:mail_from => 'functional@test.foo',
                               :bcc_recipients  => '0',
diff --git a/test/unit/tracker_test.rb b/test/unit/tracker_test.rb
index e1b1663e8..64f1078d1 100644
--- a/test/unit/tracker_test.rb
+++ b/test/unit/tracker_test.rb
@@ -83,6 +83,11 @@ class TrackerTest < ActiveSupport::TestCase
     assert_equal Tracker::CORE_FIELDS - %w(assigned_to_id due_date done_ratio), Tracker.disabled_core_fields(trackers)
   end
 
+  def test_core_fields_should_return_all_fields_for_an_empty_argument
+    assert_equal Tracker::CORE_FIELDS, Tracker.core_fields([])
+    assert_equal [], Tracker.disabled_core_fields([])
+  end
+
   def test_sort_should_sort_by_position
     a = Tracker.new(:name => 'Tracker A', :position => 2)
     b = Tracker.new(:name => 'Tracker B', :position => 1)