Add async interface to Model

[Adam Johnson]

Following #33646, it would be convenient to also have an async interface on Model methods that use the database:

• Model.asave() to mirror save()
• Model.adelete() to mirror delete()
• Model.arefresh_from_db() to mirror refresh_from_db()

Allowing usage like:

book = await Book.objects.aget(title=title)
book.pages = ...
await book.asave()

There’s already a way to effectively call save for new objects only, through the QuerySet.acreate() method, exposed on managers.

Model also has some database-touching methods used in form validation, like validate_constraints(). But if we aren’t intending on exposing the forms API as async, yet, then these could be deferred

[Mariusz Felisiak]

Sounds reasonable, thanks.

[Bhuvnesh]

Hi, i would like to work on this issue, just wanted to know if the approach will be same as in #33646 i.e. using sync_to_async?
Also a regression test for atleast asave() would be really helpful.

[Adam Johnson]

Hi, i would like to work on this issue, just wanted to know if the approach will be same as in #33646 i.e. using sync_to_async?

Yes.

Also a regression test for atleast asave() would be really helpful.

Please write the appropriate tests in your PR.

[Bhuvnesh]

​PR

[Bhuvnesh]

​UPDATED PR

[Mariusz Felisiak <felisiak.mariusz@…>]

In d5bcdf85:

Fixed #34112 -- Added async-compatible interface to Model methods.

Thanks Adam Johnson for the review.