def __get__(self, obj, model):
if model.__abstract__:<EOL><INDENT>raise CQLEngineException('<STR_LIT>')<EOL><DEDENT>queryset = model.__queryset__(model)<EOL>if model._is_polymorphic and not model._is_polymorphic_base:<EOL><INDENT>name, column = model._polymorphic_column_name, model._polymorphic_column<EOL>if column.partition_key or column.index:<EOL><INDENT>return queryset.filter(**{name: model.__polymorphic_key__})<EOL><DEDENT><DEDENT>return queryset<EOL>
:rtype: ModelQuerySet