How can I customize filtering in DJango Admin?

Question

admin.py

class authUserMenu(admin.ModelAdmin):
    list_display = ["__str__", "user_id", "menu_id","is_active"]

    class Meta:
        Model = AuthUserMenu
admin.site.register(AuthUserMenu, authUserMenu)

models.py

class AuthUserMenu(models.Model):   # USER VS MENU relation
    user = models.ForeignKey(AuthUser,on_delete=models.DO_NOTHING,blank=True, null=True)
    menu = models.ForeignKey(Menu,on_delete=models.DO_NOTHING,blank=True, null=True)
    is_active = models.BooleanField(default=False)

    class Meta:
        db_table = 'auth_user_menu'
        ordering     = ['user','menu','is_active']

    def __str__(self):
        # return self.id
        return str([self.user.username,'>>>>>>', self.menu.menu_name])

In my Django admin panel

• When filtering with username should only show some menus under some condition... How can I achieve this?

• Suppose here for the username 4 menu is showing. But it should show 2 menu. This may obtain by db querying.

• This is how A user related to menus

Answer 1

You need some JS to call a view asyncronously every time the user field is updated and change the options in the menu field with the response. The package django-autocomplete-light is a popular choice for exactly this, especially updating field values from other fields is relevant

forms.py

class AuthUserMenuForm(forms.ModelForm):

    class Meta:
        model = AuthUserMenu
        fields = '__all__'
        widgets = {
            'menu': autocomplete.ModelSelect2(
                url='menu-autocomplete',
                forward=['user']
            )
        }

views.py

class MenuAutocomplete(autocomplete.Select2QuerySetView):
    def get_queryset(self):
        qs = Menu.objects.all()
        user = self.forwarded.get('user', None)
        if user:
            # Not clear exactly what your filter would be here so left it but you have user available
            qs = qs.filter(...)
        return qs

urls.py

urlpatterns = [
    ...
    path('menu-autocomplete/', views.MenuAutocomplete.as_view(), name='menu-autocomplete'),
    ...
]

class AuthUserMenuAdmin(admin.ModelAdmin):
    form = AuthUserMenuForm
    list_display = ["__str__", "user_id", "menu_id", "is_active"]

admin.site.register(AuthUserMenu, AuthUserMenuAdmin)

Answer 2

Sorry But the filter's you are applying for admin is only valid for how they are Going to look on the admin panel it won't customize your model properties and in order to achieve that you need to create a filter as eg ...

user = self.get_object()
articles = Article.objects.filter(author_id)

Something like that