Thank you Barhamou for raising the question here and starting the discussion.
I agree with Adrian that this feels like a pretty niche use case. Depending on the needs, other possible implementations might include: 4. A form field mapping to multiple model fields 5. A custom queryset/manager that takes "shorthand filter queries" and expands them to multiple model fields As for the example in #5929 <https://code.djangoproject.com/ticket/5929> ticket description, that is probably best solved with #2 on Adrian's list, for example the django-netfields <https://pypi.org/project/django-netfields/> project for Postgres. On Mon, Jan 9, 2023 at 9:59 AM Barhamou Hama <hamabarha...@gmail.com> wrote: > Hence the interest of my question, if in 15 years it has not been solved, > there must be a reason. > > Le lundi 9 janvier 2023 à 12:57:31 UTC+1, ator...@redhat.com a écrit : > >> I feel like this is a very niche use case and probably doesn't warrant >> implementing field-to-column one-to-many relationships in Django, I don't >> see why this specific case can't be implemented as: >> >> 1. A model that implements the data type >> 2. A custom field + custom datatype on the database backend >> 3. ArrayField [1] if using postgres >> >> [1] >> https://docs.djangoproject.com/en/4.1/ref/contrib/postgres/fields/#arrayfield >> On Monday, January 9, 2023 at 12:16:56 AM UTC+1 cur...@tinbrain.net >> wrote: >> >>> On Sun, 8 Jan 2023, at 23:29, Barhamou Hama wrote: >>> >>> Hi all, I came across this ticket here >>> <https://code.djangoproject.com/ticket/5929> opened 15 years ago that >>> doesn't seem to have been resolved. I decided to work on it. But in 15 >>> years a lot can happen. Is it still relevant? Has there been any progress >>> on this issue? >>> >>> >>> >>> IIRC there's no current support for this, the closest being >>> GenericForeignKeys, which still require their sub-fields defined separately. >>> >>> There has been posts about supporting joint using multi-field keys ( >>> https://devblog.kogan.com/blog/custom-relationships-in-django) however, >>> that's a rather specific case. >>> >>> I think it would be a good thing for progress on this issue to happen. >>> >>> You might also want to check the ticket history for any work on >>> multi-value keys. >>> >>> -- >>> Curtis >>> >>> >>> -- > You received this message because you are subscribed to the Google Groups > "Django developers (Contributions to Django itself)" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to django-developers+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/django-developers/9e4ee8c9-aa22-4ac1-bd70-1c87427ca955n%40googlegroups.com > <https://groups.google.com/d/msgid/django-developers/9e4ee8c9-aa22-4ac1-bd70-1c87427ca955n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Django developers (Contributions to Django itself)" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-developers+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-developers/CAMGFDKRDeF-VqnYg%2BHmTYo-pT1QyG61dUKKqm3Ai_jSKnb984g%40mail.gmail.com.
