this has just confused me for a while , and constantly trips me up...
class FirstTable()
__tablename__ = 'first_table'
id = Column(Integer, primary_key=True)
class SecondTable()
__tablename__ = 'second_table'
id = Column(sa.Integer, primary_key=True)
first_table_id = Column(sa.Integer, ForeignKey("first_table.id") )
first_table = relationship("FirstTable", primaryjoin="""FirstTable.id
== SecondTable.first_table_id""")
was there a specific reason why the string in `ForeignKey` is for the
table+column, and not an object, like in `relationship` ? ( i know that
`ForeignKey` can take an object too , i'm just wondering about the string )
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