Django model field validator function used for update or insert [closed]

问题

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Closed 7 years ago.

Is there a way of figuring out inside a Django model field validator function if it used for update or insert?

回答1:

No, there isn't. A validator is simply a callable that takes a value and checks it. It has no access to the field or instance being validated, so it is impossible to tell whether it is a new or existing instance.

回答2:

Not sure if it's what you're looking for, but I generally use self.pk to determine whether a model has already been saved or not. If there's no primary key, I can assume it's an insert.

来源：https://stackoverflow.com/questions/12665153/django-model-field-validator-function-used-for-update-or-insert