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DRF - Dealing with nested objects

chifarol answered on July 21, 2022 Popularity 1/10 Helpfulness 1/10

answer DRF - Dealing with nested objects

DRF - Dealing with nested objects

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#for Model serializers
class AccountSerializer(serializers.ModelSerializer):
    class Meta:
        model = Account
        fields = ['id', 'account_name', 'users', 'created']
        depth = 1 #generate nested representations using the depth option

# getting model methods
class AccountSerializer(serializers.ModelSerializer):
    abs_url = serializers.CharField(source='get_absolute_url', read_only=True)
    groups = serializers.PrimaryKeyRelatedField(many=True)

    class Meta:
        model = Account
        fields = ['url','abs_url','groups']


#The Serializer class is itself a type of Field, and can be used to represent relationships where one object type is nested inside another.
class UserSerializer(serializers.Serializer):
    email = serializers.EmailField()
    username = serializers.CharField(max_length=100)

class CommentSerializer(serializers.Serializer):
    user = UserSerializer(required=False)  # May be an anonymous user.
    edits = EditItemSerializer(many=True) # A nested list of 'edit' items.
    content = serializers.CharField(max_length=200)
    created = serializers.DateTimeField()

#for nested representations you'll need to write .create() or .update() methods that handle saving multiple objects.
class UserSerializer(serializers.ModelSerializer):
    profile = ProfileSerializer()

    class Meta:
        model = User
        fields = ['username', 'email', 'profile']

    def create(self, validated_data):
        profile_data = validated_data.pop('profile')
        user = User.objects.create(**validated_data)
        Profile.objects.create(user=user, **profile_data)
        return user
    def update(self, instance, validated_data):
        profile_data = validated_data.pop('profile')
        # Unless the application properly enforces that this field is
        # always set, the following could raise a `DoesNotExist`, which
        # would need to be handled.
        profile = instance.profile

        instance.username = validated_data.get('username', instance.username)
        instance.email = validated_data.get('email', instance.email)
        instance.save()

        profile.is_premium_member = profile_data.get(
            'is_premium_member',
            profile.is_premium_member
        )
        profile.has_support_contract = profile_data.get(
            'has_support_contract',
            profile.has_support_contract
         )
        profile.save()

        return instance
        
#

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Contributed on Jul 21 2022

chifarol

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DRF - Dealing with nested objects

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