I want to add a column to a database table but I don't want to modify the 3rd party module in case I need/decide to upgrade the module in the future. Is there a way I can add this field within my code so that with new builds I don't have to add the field manually?
我想向数据库表中添加一个列，但我不想修改第三方模块，以防将来需要/决定升级该模块。有没有一种方法可以在我的代码中添加这个字段，这样我就不用手动添加新的构建了?
2 个解决方案
#1
9
You can use ModelName.add_to_class (or .contribute_to_class), but if you have already run syncdb, then there is no way to automatically have it add the columns you need.
您可以使用ModelName。add_to_class(或.contribute_to_class)，但是如果您已经运行了syncdb，那么就无法自动地让它添加所需的列。
For maintainable code, you will probably want to extend by sub-classing the desired model in your own app, and use something like south to handle the database migrations, or just use a OneToOneField, and have a related model (like UserProfile is to auth.User).
对于可维护性代码，您可能想要在自己的应用程序中对所需的模型进行子类化，并使用类似于南方的东西来处理数据库迁移，或者只使用OneToOneField，并有一个相关的模型(比如UserProfile是auth.User)。
#2
0
Take a look to Django model inheritance and abstract classes http://docs.djangoproject.com/en/dev/topics/db/models/#multi-table-inheritance
查看Django模型继承和抽象类http://docs.djangoproject.com/en/dev/topics/db/models/#multi-table继承
#1
9
You can use ModelName.add_to_class (or .contribute_to_class), but if you have already run syncdb, then there is no way to automatically have it add the columns you need.
您可以使用ModelName。add_to_class(或.contribute_to_class)，但是如果您已经运行了syncdb，那么就无法自动地让它添加所需的列。
For maintainable code, you will probably want to extend by sub-classing the desired model in your own app, and use something like south to handle the database migrations, or just use a OneToOneField, and have a related model (like UserProfile is to auth.User).
对于可维护性代码，您可能想要在自己的应用程序中对所需的模型进行子类化，并使用类似于南方的东西来处理数据库迁移，或者只使用OneToOneField，并有一个相关的模型(比如UserProfile是auth.User)。
#2
0
Take a look to Django model inheritance and abstract classes http://docs.djangoproject.com/en/dev/topics/db/models/#multi-table-inheritance
查看Django模型继承和抽象类http://docs.djangoproject.com/en/dev/topics/db/models/#multi-table继承