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我有以下型号:的SQLAlchemy:filter_by与像()对外国属性
class CRRun(Base):
...
crID = Column(u'CR_ID', INTEGER(), ForeignKey(CR.id), primary_key=True,
nullable=False)
cr = relationship(CR, backref=backref("CR_RUN", uselist=False))
...
class CR(Base):
...
id = Column(u'CR_ID', INTEGER(), primary_key=True, nullable=False)
state = Column(u'STATE', VARCHAR(20))
...
我再努力做到以下几点:
state = 'some value'
crsRuns = Session.query(CRRun)
crsRuns = crsRuns.options(eagerload('cr'))
.filter(CRRun.cr != None)
.filter(CRRun.cr.state.like('%' + state + '%'))
然而,这将导致以下错误:
AttributeError: Neither 'InstrumentedAttribute' object nor 'Comparator' object has an attribute 'state'
如何通过连接到表的表中的列的值过滤查询通过fo查询统治关键?