Adds previous/next links to issue (#2850).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@8488 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/redmine/core_ext/active_record.rb

@@ -0,0 +1,53 @@
+# Redmine - project management software
+# Copyright (C) 2006-2011  Jean-Philippe Lang
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+module ActiveRecord
+  class Base
+    def self.find_ids(options={})
+      find_ids_with_associations(options)
+    end
+  end
+
+  module Associations
+    module ClassMethods
+      def find_ids_with_associations(options = {})
+        catch :invalid_query do
+          join_dependency = ActiveRecord::Associations::ClassMethods::JoinDependency.new(self, merge_includes(scope(:find, :include), options[:include]), options[:joins])
+          return connection.select_values(construct_ids_finder_sql_with_included_associations(options, join_dependency))
+        end
+        []
+      end
+
+      def construct_ids_finder_sql_with_included_associations(options, join_dependency)
+        scope = scope(:find)
+        sql = "SELECT #{table_name}.id FROM #{(scope && scope[:from]) || options[:from] || quoted_table_name} "
+        sql << join_dependency.join_associations.collect{|join| join.association_join }.join
+
+        add_joins!(sql, options[:joins], scope)
+        add_conditions!(sql, options[:conditions], scope)
+        add_limited_ids_condition!(sql, options, join_dependency) if !using_limitable_reflections?(join_dependency.reflections) && ((scope && scope[:limit]) || options[:limit])
+
+        add_group!(sql, options[:group], options[:having], scope)
+        add_order!(sql, options[:order], scope)
+        add_limit!(sql, options, scope) if using_limitable_reflections?(join_dependency.reflections)
+        add_lock!(sql, options, scope)
+
+        return sanitize_sql(sql)
+      end
+    end
+  end
+end