operations.py 文件源码

def create_foreign_key(
            self, name, referent, local_cols, remote_cols, **kw):
        """Issue a "create foreign key" instruction using the
        current batch migration context.

        The batch form of this call omits the ``source`` and ``source_schema``
        arguments from the call.

        e.g.::

            with batch_alter_table("address") as batch_op:
                batch_op.create_foreign_key(
                            "fk_user_address",
                            "user", ["user_id"], ["id"])

        .. seealso::

            :meth:`.Operations.create_foreign_key`

        """
        return super(BatchOperations, self).create_foreign_key(
            name, self.impl.table_name, referent, local_cols, remote_cols,
            source_schema=self.impl.schema, **kw)