Filter after project custom fields (#29482).

Patch by Marius BALTEANU.

git-svn-id: http://svn.redmine.org/redmine/trunk@18764 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/project_query.rb

@@ -44,6 +44,7 @@ class ProjectQuery < Query
       :type => :list,
       :values => [[l(:general_text_yes), "1"], [l(:general_text_no), "0"]]
     add_available_filter "created_on", :type => :date_past
+    add_custom_fields_filters(project_custom_fields)
   end
 
   def available_columns

app/models/query.rb

@@ -609,6 +609,11 @@ class Query < ActiveRecord::Base
     end
   end
 
+  # Returns a scope of project custom fields that are available as columns or filters
+  def project_custom_fields
+    ProjectCustomField.all
+  end
+
   # Returns a scope of project statuses that are available as columns or filters
   def project_statuses_values
     [