Admin does not update every ForeignKey select of the same model

[danilo <danilo.cabello@…>]

Consider I have the following models:

class City(models.Model):
  name = models.CharField(80)
  state  = models.CharField(2)

class Person(models.Model):
  living_city = models.ForeignKey(City)
  born_city = models.ForeignKey(City, related_name='born_city_set')

When I go to admin to add a new Person, I have the option to add a city at living_city select and born_city select, if I add a city at living_city select, for example, the born_city select does not update automatically, it remains empty or without the new option.

[Aymeric Augustin]

Change UI/UX from NULL to False.

[Aymeric Augustin]

Change Easy pickings from NULL to False.

[googol]

I'd like to vote for this feature as it is crucial for our projects. Without it customers have to edit the entities first (City) they will refer to in other models (Person) which is very bad from a usability point of view!

[roland]

second vote

[Adonys Alea Boffill]

I think that is a little difficult to find a simple and elegant way to fix this ticket.
The Select fields are updated in RelatedObjectLookups.js when the popup is closed after to add the new record. In order to update all fields related with the same model, is necessary to have at least something to identify all HTML elements with the same model, something like data-model-ref="". Now this is a little more easy with the new template-based widget rendering, because is easy to add the attribute to the template.
But to make this simple change in the template, is necessary to update all tests related with the html content of widgets. And I don't know if to add a new attribute to the field widget template it's finally convenient or worthwhile.

If finally to add something like data-model-ref="" in the field widget template is not a bad idea, I can work on a solution.

[Carlton Gibson]

The suggest patch looks kind of neat, so 👍
I think limit_choices_to (and maybe other wiggles) need consideration for it to be 100%

[Mariusz Felisiak <felisiak.mariusz@…>]

In c72f6f3:

Fixed #11803 -- Allowed admin select widgets to display new related objects.

Adjusted admin javascript to add newly created related objects to
already loaded select widgets.

In this version, applies only where limit_choices_to is not set.