contentreference = page.contentreferences.get(name=container_name)
except ContentReference.DoesNotExist:
contentreference = ContentReference(name=container_name, page=page, content_type=container_content_type)
contentreference = page.contentreferences.get(name=container_name)
except ContentReference.DoesNotExist:
contentreference = ContentReference(name=container_name, page=page, content_type=container_content_type)