How to create MultipleChoiceField in django-filter?

Question

I have a model Color:

class Color(models.Model):
    color = models.CharField(max_length=32)

    def __str__(self):
        return self.color

And my Product model:

class Product(models.Model):
    ...
    color = models.ForeignKey('Color', on_delete=CASCADE)
    ...

So i need to create a filter that i'll able to get for example all red, blue or yellow products

How can i do that?

Answer 1

You can .filter(…) [Django-doc] with:

Product.objects.filter()

with some_color_name for example 'Yellow'. If you have a color object, you can work with:

Product.objects.filter()

One can use double underscores ( __ ) to look "through" relations.

Answer 2

To create a filter with multiple choices for a model you can use the ModelMultipleChoiceFilter [django-filter docs] . You can also pass the form widget you want to get used for the field, hence for checkboxes you would pass CheckboxSelectMultiple [Django docs] :

from django import forms
import django_filters


class ProductFilter(django_filters.FilterSet):
    color = django_filters.ModelMultipleChoiceFilter(queryset=Color.objects.all(), widget=forms.CheckboxSelectMultiple())
    
    class Meta:
        model = Product
        fields = ['color']  # Add any other fields you want to filter to the list