custom_types.py 文件源码

def coerce_compared_value(self, op, value):
        # NOTE(mdietz): If left unimplemented, the column is coerced into a
        # string every time, causing the next_auto_assign_increment to be a
        # string concatenation rather than an addition. 'value' in the
        # signature is the "other" value being compared for the purposes of
        # casting.
        if isinstance(value, int):
            return types.Integer()
        return self