operations.py 文件源码

def create_unique_constraint(self, name, local_cols, **kw):
        """Issue a "create unique constraint" instruction using the
        current batch migration context.

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

        .. seealso::

            :meth:`.Operations.create_unique_constraint`

        """
        kw['schema'] = self.impl.schema
        return super(BatchOperations, self).create_unique_constraint(
            name, self.impl.table_name, local_cols, **kw)