When going through the (excellent) documentation on relationsship I came
across this example:
from sqlalchemy import Integer, ForeignKey, String, Column
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import relationship
Base = declarative_base()
class User(Base):
__tablename__ = 'user'
id = Column(Integer, primary_key=True)
name = Column(String)
addresses = relationship("Address",
primaryjoin="and_(User.id==Address.user_id, "
"Address.email.startswith('tony'))",
backref="user")
class Address(Base):
__tablename__ = 'address'
id = Column(Integer, primary_key=True)
email = Column(String)
user_id = Column(Integer, ForeignKey('user.id'))
What would be required to make this (User) addresses property a method
with the startwith part a parameter? Can this be done using the
relationship definitions? Or would it require a method with a explicit
query in it (which would need the existance of a session)?
Kind regards,
Thijs
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