Django admin, filter objects for inline formset

Question

I\'ve got an inline formset and I would like to exclude some model objects from being displayed in the formset.

For eg. there is model B which has foreign key to mo

Answer 1

In Django 3, you should use formfield_for_foreignkey.

here is a working example :

class CaracteristiqueInline(admin.TabularInline):
  model = Caracteristique
  formset = FiltreCaracteristiqueInline

  def formfield_for_foreignkey(self, db_field, request, **kwargs):
    if db_field.name == "id_Champ": # The FK in my table Caracteristique
        kwargs["queryset"] = Champ.objects.filter(est_DC_Champ=False)
        # Champ is the parent table of Caracteristique
        # est_DC_Champ is a field of the table Champ
    return super().formfield_for_foreignkey(db_field, request, **kwargs)
  extra = 0

With this, in your Tabular View, the choices in the dropdown of your FK Field will be filtered.