python - django-rest-framework how to make model serializer fields required

Question

I have a model that I'm filling out step by step, it means I'm making a form wizard.

Because of that most fields in this model are required but have null=True, blank=True to avoid raising not null errors when submitting part of the data.

I'm working with Angular.js and django-rest-framework and what I need is to tell the api that x and y fields should be required and it needs to return a validation error if they're empty.

Answer 1

The best option according to docs here is to use extra_kwargs in class Meta, For example you have UserProfile model that stores phone number and is required

class UserProfileSerializer(serializers.ModelSerializer):
    class Meta:
        model = UserProfile
        fields = ('phone_number',)
        extra_kwargs = {'phone_number': {'required': True}}