Class Q

mongoengine/queryset/visitor.py:166–189

A simple query object, used in a query tree to build up more complex query structures.

class Q(QNode):
    """A simple query object, used in a query tree to build up more complex
    query structures.
    """

    def __init__(self, **query):
        self.query = query

    def __repr__(self):
        return "Q(**%s)" % repr(self.query)

    def __bool__(self):
        return bool(self.query)

    def __eq__(self, other):
        return self.__class__ == other.__class__ and self.query == other.query

    def accept(self, visitor):
        return visitor.visit_query(self)

    @property
    def empty(self):
        warn_empty_is_deprecated()
        return not bool(self.query)