From 703b0ec422bbb9bac775254e8e284a4b145551e2 Mon Sep 17 00:00:00 2001
From: Jean-Philippe Lang <jp_lang@yahoo.fr>
Date: Tue, 21 Dec 2010 21:46:54 +0000
Subject: [PATCH] Fixed: 500 error on issue query grouped by a custom field
 that was deleted (#7144).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4553 e93f8b46-1217-0410-a6f0-8f06a7374b81
---
 app/models/query.rb     |  6 +++---
 test/unit/query_test.rb | 16 ++++++++++++++++
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/app/models/query.rb b/app/models/query.rb
index 949054533..1f033048a 100644
--- a/app/models/query.rb
+++ b/app/models/query.rb
@@ -378,15 +378,15 @@ class Query < ActiveRecord::Base
   
   # Returns true if the query is a grouped query
   def grouped?
-    !group_by.blank?
+    !group_by_column.nil?
   end
   
   def group_by_column
-    groupable_columns.detect {|c| c.name.to_s == group_by}
+    groupable_columns.detect {|c| c.groupable && c.name.to_s == group_by}
   end
   
   def group_by_statement
-    group_by_column.groupable
+    group_by_column.try(:groupable)
   end
   
   def project_statement
diff --git a/test/unit/query_test.rb b/test/unit/query_test.rb
index 173367a4b..4d85a2b2b 100644
--- a/test/unit/query_test.rb
+++ b/test/unit/query_test.rb
@@ -235,6 +235,22 @@ class QueryTest < ActiveSupport::TestCase
     q = Query.new
     assert q.groupable_columns.detect {|c| c.is_a? QueryCustomFieldColumn}
   end
+
+  def test_grouped_with_valid_column
+    q = Query.new(:group_by => 'status')
+    assert q.grouped?
+    assert_not_nil q.group_by_column
+    assert_equal :status, q.group_by_column.name
+    assert_not_nil q.group_by_statement
+    assert_equal 'status', q.group_by_statement
+  end
+  
+  def test_grouped_with_invalid_column
+    q = Query.new(:group_by => 'foo')
+    assert !q.grouped?
+    assert_nil q.group_by_column
+    assert_nil q.group_by_statement
+  end
   
   def test_default_sort
     q = Query.new