用迁移可以容易地进行这个变化，因为迁移可以访问对象模型并根据模型的状态进行决策。

You can easily make this change in a migration because the migration has access to model objects and can make logical decisions based on the model's state.

youdao

用迁移可以容易地进行这个变化，因为迁移可以访问对象模型并根据模型的状态进行决策。

You can easily make this change in a migration because the migration has access to model objects and can make logical decisions based on the model's state.

youdao