how to add functionality of choose_all and remove_all functionality for a model in django-admin

Question

I need to add the Choose all and Remove all functionality to one of the django model in the admin view. but not finding any documentation.

I am creating Food table:

<group1->
name:vegetarian

food 
----
vegetables
nuts
greens
chicken
egg


<group2->
name: non-veg

food 
----
vegetables
nuts
greens
chicken
egg

like above i need to choose the food-items and create a group. i want to display like groups option with choose_all/remove_all options.

Answer 1

I referred the official django code for Groups. followed the same, and it just worked great. Here is how i did.

class FoodPermission(models.Model):
    name = models.CharField(max_length=150)

    def __str__(self):
        return str(self.url_name)


class FoodGroup(models.Model):
    name = models.CharField(max_length=150)
    permissions = models.ManyToManyField(FoodPermission, blank=True)

    def __str__(self):
        return str(self.name)
   

In the admin.py.

The following code is copied from official django source and just changed class name and commented one line.

class FoodGroupAdmin(admin.ModelAdmin):
    search_fields = ("name",)
    ordering = ("name",)
    filter_horizontal = ("permissions",)


admin.site.register(FoodGroup, FoodGroupAdmin)

with those changed everything worked like charm.