Fixed migration ChangeMembersUsersAssociationToPolymorphic#down.

git-svn-id: http://redmine.rubyforge.org/svn/branches/work@1402 e93f8b46-1217-0410-a6f0-8f06a7374b81

groups/db/migrate/095_change_members_users_association_to_polymorphic.rb

@@ -9,12 +9,12 @@ class ChangeMembersUsersAssociationToPolymorphic < ActiveRecord::Migration
   end
 
   def self.down
-    # Remove inherited memberships
+    # Remove inherited and groups memberships
-    Member.delete_all "inherited_from IS NOT NULL"
+    Member.delete_all "inherited_from IS NOT NULL OR principal_type = 'Group'"
     add_column :members, :user_id, :integer, :default => 0, :null => false
     Member.update_all "user_id = principal_id"
-    remove_column :members, :principal_type, :string
+    remove_column :members, :principal_type
-    remove_column :members, :principal_id, :integer
+    remove_column :members, :principal_id
-    remove_column :members, :inherited_from, :integer
+    remove_column :members, :inherited_from
   end
 end