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

Issue

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.

Solution

You need to override the field specifically and add your own validator. You can read here for more detail http://www.django-rest-framework.org/api-guide/serializers/#specifying-fields-explicitly. This is the example code.

def required(value):
    if value is None:
        raise serializers.ValidationError('This field is required')

class GameRecord(serializers.ModelSerializer):
    score = IntegerField(validators=[required])

    class Meta:
        model = Game

Answered By - Edwin Lunando