I'm trying to do a select of columns from a join and I simply can't get it
to work. I have tried various different ways to specify the join, with and
without a select_from() and I can't find a combination that works.
the tables look like
class Dealer(Base):
__tablename__ = 'dealers'
id = Column(String(64), primary_key=True, nullable=False)
name =Column(String(100), nullable=False)
phone_number = Column(String(64), nullable=False)
def __repr__(self):
return "<Dealer(supplying_dealer='%s', registration='%s',
servicing_dealer='%s')>" % (
self.supplying_dealer, self.registration,
self.servicing_dealer)
class Vehicle(Base):
__tablename__ = 'vehicles'
registration = Column(String(10), primary_key=True, nullable=False)
supplying_dealer = Column(String(64), ForeignKey(u'dealers.id'),
nullable=False)
servicing_dealer = Column(String(64), ForeignKey(u'dealers.id'),
nullable=False)
def __repr__(self):
return "<Vehicle(registration='%s', supplying_dealer='%s',
servicing_dealer='%s')>" % (
self.registration, self.supplying_dealer, self.servicing_dealer)
and I have tried lots of variations on:
for supplier, phone, registration in
session.query(Dealer.name,Dealer.phone_number,Vehicle.registration).select_from(Vehicle).join('supplying_dealer'):
print( supplier, phone, registration )
I haven't found a combination that works. Am I missing the obvious?
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