How Parent object will create in Django Restframework nested serializers

Question

How Parent object will create in Django Restframework nested serializers? I want to show all children associated to the parent but the problem is that when I try to create Parent it asks children list and as per the rule first parent will born

models

class Parent(models.Model)                                          
    name = models.CharField(max_length=30)
class Child(models.Model)
    parent = models.ForeignKey(Parent, on_delete=models.CASCADE)
    name = models.CharField(max_length=30)

Serializers

class ChildSerializer(ModelSerializer):
    class Meta:
        model = Child
        fields = ('name')
class ParentSerializer(ModelSerializer):
    children = ChildSerializer(many=True)
    class Meta:
        model = Parent
        fields = ('name','children')

views.py

class ParentViewSet(ModelViewSet):
    serializer_class = ParentSerializer
    queryset = Parent.objects.all()

Response:

{
    "children": [
        "This field is required."
    ]
}

I'm getting this response :{ "children": [ "This field is required." ] } — Shubham
– Shubham, Commented Dec 16, 2018 at 13:42

nishant · Accepted Answer · 2018-12-16 14:07:36Z

1

update your parentserializer with this

class ParentSerializer(ModelSerializer):
children = ChildSerializer(many=True, read_only=True)
class Meta:
    model = Parent
    fields = ('name','children')

update childSerializer with

class ChildSerializer(ModelSerializer):
class Meta:
    model = Child
    fields = ('name',)

edited Dec 16, 2018 at 14:07

answered Dec 16, 2018 at 13:51

nishant

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1 Comment

nishant Over a year ago

have you added any child?

Saad Aleem · Accepted Answer · 2018-12-16 13:51:58Z

0

You need to add required=False to your nested ChildSerializer:

class ParentSerializer(ModelSerializer):
    children = ChildSerializer(many=True, required=False)
    class Meta:
        model = Parent
        fields = ('name','children')

answered Dec 16, 2018 at 13:51

Saad Aleem

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