CODEWITHSUNDEEP
djangodjango-modelsdjango-rest-frameworkdjango-serializer
SMMousaviSP
SMMousaviSP

Reputation: 816

change serializer to show both id and title of a foreignKey field

I'm using DRF and I have a Profile serializer with a group field that is a foreignKey to Group model. Profile Serializer:

class ProfileSerializer(serializers.ModelSerializer):

    class Meta:
        model = Profile
        fields = ('group', ...)

Profile Model:

class Profile(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    # other fields
    group = models.ForeignKey(Group, on_delete=models.CASCADE)

Group Model:

class Group(models.Model):
    title = models.CharField(max_length=100)

    def __str__(self):
        return self.title

Group Serializer:

class GroupSerializer(serializers.ModelSerializer):

    class Meta:
        model = Group
        fields = ('title', 'id')
        extra_kwargs = {'id': {'read_only': True}}

I have a route in my SPA that showing a list of profiles. I want to show the group title for each profile but this serializer only provide me an id of group and I don't want to create another view to get id of group and give me title. so I search about it and it was 2 solution first StringRelatedFieldthat is read_only and SlugRelatedField. I changed ProfileSerializer and add SlugRelatedField like this:

class ProfileForAdminSerializer(serializers.ModelSerializer):
    group = serializers.SlugRelatedField(
        many=False,
        queryset=Group.objects.all(),
        slug_field='title'
    )

    class Meta:
        model = Profile
        fields = ('group', ...)

now I have access to title of profile group but the problem is I have to create Profile with providing title of group field, but I want to create Profile like before with sending id of group and also have access to title of group without send another request. (sorry for bad English)

Upvotes: 0

Views: 284

Answers (1)

Davit Tovmasyan
Davit Tovmasyan

Reputation: 3588

Have you considered source argument on serializer field ?

It should be something like this

group_title = serializers.ReadOnlyField(source='group.title')

class Meta:
    ...
    fields = ('group_title', ...)

check here

Upvotes: 2

Related Questions