#31295: required ModelChoiceField makes duplicate (cursor) queries to the database -------------------------------------+------------------------------------- Reporter: Aurélien Pardon | Owner: nobody Type: | Status: closed Cleanup/optimization | Component: Forms | Version: 2.2 Severity: Normal | Resolution: needsinfo Keywords: Model | Triage Stage: | Unreviewed Has patch: 0 | Needs documentation: 0 Needs tests: 0 | Patch needs improvement: 0 Easy pickings: 0 | UI/UX: 0 -------------------------------------+-------------------------------------
Comment (by Aurélien Pardon): The fact that the following code makes '''two''' requests to the database : {{{#!python class MyModel(models.Model): my_field = models.CharField(max_length=1) class MyForm(forms.Form): my_form_field = forms.ModelChoiceField(MyModel.objects.all(), empty_label=None) my_form.as_ul() }}} is absolutely not working as intended. Show this to any other core dev and ask them, please. This whole "invalid HTML code" is not an important issue. It happens yes, but under very rare circumstances (a blank primary key and an {{{INSERT}}} between the two '''identical''' requests to the database), and it also won't bother any browser. I can work hard and show you the invalid HTML code (using database trigger to emulate race conditions?) but honestly it's not the problem. -- Ticket URL: <https://code.djangoproject.com/ticket/31295#comment:9> 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 view this discussion on the web visit https://groups.google.com/d/msgid/django-updates/065.717313c12a54f3c538e3a3906178d6f4%40djangoproject.com.