#25227: Add utility method `get_updated_model()` to `ModelForm` --------------------------------------+-------------------- Reporter: candeira | Owner: nobody Type: Cleanup/optimization | Status: new Component: Forms | Version: master Severity: Normal | Keywords: Triage Stage: Unreviewed | Has patch: 1 Easy pickings: 0 | UI/UX: 0 --------------------------------------+-------------------- Add utility method `get_updated_model()` to `ModelForm` and, additionally, add utility method `get_updated_models()` to `FormSet`.
Rationale: While doing the djangogirls tutorial, I noticed that `ModelForm.save(commit=False)` is given to newcomers as a reasonable way to acquire a form's populated model. This is an antipattern for several reasons: - It's counterintuitive. To a newcomer, it's the same as ``save(save=no)``. - It's a leaky abstraction. Understanding it requires understanding that the save method does two things: a) prepare the model, and b) save it to the database. - It doesn't name its effect or return well. It returns a model, not a form. All these problems are addressed in the current patch. Changes: - Implement `ModelForm.get_updated_model()` - Implement `FormSet.get_updated_models()` - Refactor `models.py` minimally for the above to work. - Tests not added for `get_updated_model()` nor `get_updated_models()` because the changes are small enough to be considered as a refactoring. - Both the tests and `contrib.auth` have been modified: any call to `save(commit=False)` for the purpose of obtaining a populated model has been replaced by `get_updated_model()`. Tests still pass, I'm confident it's a successful refactor. - `docs/customizing.txt` has also been modified to showcase the new method. Notes: Uses of `ModelForm.save(commit=False)` in the codebase have been left alone wherever it was used for its side effects and not for its return value. -- Ticket URL: <https://code.djangoproject.com/ticket/25227> Django <https://code.djangoproject.com/> The Web framework for perfectionists with deadlines. -- You received this message because you are subscribed to the Google Groups "Django updates" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-updates+unsubscr...@googlegroups.com. To post to this group, send email to django-updates@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-updates/051.12bff7e3a0965e7f06cc684faed280b5%40djangoproject.com. For more options, visit https://groups.google.com/d/optout.