Serializing an array of data on the basis of foreign key django rest framework

Question

I am using django rest framework to post property_id in favorites table as a foreign key and on the basis of foreign key i want to get all fields from property table.

class Favorites(models.Model):
    """Store favorite property"""

    user_id = models.ForeignKey(User, on_delete=models.CASCADE)
    property_id = models.ForeignKey(Property, on_delete=models.CASCADE)
    created_at = models.DateTimeField(auto_now_add=True, blank=True)

Serializer:

class FavoriteSerializer(serializers.ModelSerializer):
    """Favorite Properties serializer"""

    class Meta:
        model = Favorites
        fields = ('user_id','property_id', )

Viewset:

class FavoriteViewSet(viewsets.ModelViewSet):

    http_method_names = ['get','post' ]
    serializer_class = FavoriteSerializer
    queryset = Favorites.objects.all()

Output:

This is my first output. then i sync my property Serializer and get this one:

This is the output i need but it creates problem during post. During post i only need user_id and property_id but it makes my post form like this:

Any suggestions how i can achieve my results?

Yes i try to insert data and got error "null value in column "property_id" violates not-null constraint". — Salman Ahmed
– Salman Ahmed, Commented Oct 18, 2017 at 4:37

Ykh · Accepted Answer · 2017-10-18 07:29:23Z

2

serializers.py

class FavoriteCreateSerializer(serializers.ModelSerializer):
    """Favorite Properties serializer"""

    class Meta:
        model = Favorites
        fields = ('user_id','property_id', )

class FavoriteListSerializer(serializers.ModelSerializer):
    property_id = PropertySerializer(read_only=True)

    class Meta:
        model = Favorites
        fields = ('user_id','property_id', )

views.py

class FavoriteViewSet(viewsets.ModelViewSet):

    http_method_names = ['get','post' ]
    serializer_class = FavoriteSerializer
    queryset = Favorites.objects.all()

    def get_serializer_class(self):
            if self.action == 'create':
                return FavoriteCreateSerializer
            else:
                return self.serializer_class

edited Oct 18, 2017 at 7:29

answered Oct 18, 2017 at 5:04

Ykh

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1 Comment

Salman Ahmed Over a year ago

Thanks @Ykh this is second approach which i adopted.

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