1. You can override `.save` method of a model and detect that it is an update
operation like this
```
def save(self, *args, **kwargs):
if not self._state.adding:
…
```
According to
https://docs.djangoproject.com/en/3.0/ref/models/instances/ one can supply
`update_fields` to the save method and then you can raise
exception when that parameter is not to your liking during the update.
2. If you rely on DRF serializer, you can create a different serializer for
updating
3. Since this is a forum on DRF, to prevent update via http, you write
different views for PUT vs POST ie you allow insert into all fields in your
POST view but updates on your whitelisted fields in PUT view.
> On May 5, 2020, at 05:49, Андрей Казанцев <hec...@yandex.ru> wrote:
>
> I have a model with fields: A, B, C. I want all fields on create be
> available, but on update only A filed to be avaliable. How to do this?
>
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