U ZjN@s@dZddlZddlmZddlmZddlmZddlmZddl m Z ddl m Z dd l mZdd l mZddl mZdd lmZeeZGd d d eZGdddeZGdddeZeddddZeddddZeddZejeddddZejeddddZ ej!Ze j"Z ej#Z#dS)zBaked query extension. Provides a creational pattern for the :class:`.query.Query` object which allows the fully constructed object, Core select statement, and string compiled result to be fully cached. N)exc)util)strategy_options)Query)Session)func)literal_column)collections_abcc@s$eZdZdZdZddZddZdS)BakeryzCallable which returns a :class:`.BakedQuery`. This object is returned by the class method :meth:`.BakedQuery.bakery`. 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The parameter should normally be the :class:`_query.Query` object that is passed to the lambda:: sub_bq = self.bakery(lambda s: s.query(User.name)) sub_bq += lambda q: q.filter( User.id == Address.user_id).correlate(Address) main_bq = self.bakery(lambda s: s.query(Address)) main_bq += lambda q: q.filter( sub_bq.to_query(q).exists()) In the case where the subquery is used in the first callable against a :class:`.Session`, the :class:`.Session` is also accepted:: sub_bq = self.bakery(lambda s: s.query(User.name)) sub_bq += lambda q: q.filter( User.id == Address.user_id).correlate(Address) main_bq = self.bakery( lambda s: s.query( Address.id, sub_bq.to_query(q).scalar_subquery()) ) :param query_or_session: a :class:`_query.Query` object or a class :class:`.Session` object, that is assumed to be within the context of an enclosing :class:`.BakedQuery` callable. .. versionadded:: 1.3 Nz1Given Query needs to be associated with a Sessionz)Query or Session object expected, got %r.) r,rrr7sa_exc ArgumentError TypeErrortyperM)rZquery_or_sessionr7rrrto_querys&  zBakedQuery.to_querycCs.|jd|}|jddD] }||}q|SNrrC)r)rr7rNsteprrrrM/s zBakedQuery._as_query)r)r#N)r)F)N)N)rrrrrr classmethodr"r(r!r1r3r.r2r8rr;r<rBr>r9rPrUrMrrrrr7s*         # 5rc@seZdZdZdZddZddZddZd d Zd d Z d dZ ddZ ddZ ddZ ddZddZddZddZddZdd Zd!d"Zd#S)$r5aInvokes a :class:`.BakedQuery` against a :class:`.Session`. 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