Get data in multiple level nested serializer using Django Rest - django-rest-framework

Question

Need to serialize three models nested in three levels.
There are users assigned areas and these contains point. The users contains multiple areas. Areas have multiple points associated.
Users links areas using many to many relationship.
Areas Links with point using Foreign in the points.
Users can be assigned to multiple areas. Areas can have multiple points.
User Profile Model
class UserProfile(AbstractBaseUser,PermissionsMixin):
phone_number= PhoneNumberField( unique=True)
name=models.CharField(max_length=255)
organisation=models.CharField(max_length=255)
is_active=models.BooleanField(default=True)
is_staff=models.BooleanField(default=False)
added_by=models.ForeignKey(settings.AUTH_USER_MODEL,default=1)
group = models.ForeignKey('auth.Group', null=True)
areas=models.ManyToManyField('area.Area',blank=True)
objects=UserProfileManager()
Areas Model
from django.db import models
from django.conf import settings
# Create your models here.
class Area(models.Model):
areaName =models.TextField()
timestamp = models.DateTimeField(auto_now=False, auto_now_add=True)
updated = models.DateTimeField(auto_now=True, auto_now_add=False)
user = models.ForeignKey(settings.AUTH_USER_MODEL )
def __str__(self):
return self.areaName
Point Model
from django.db import models
from django.conf import settings
# Create your models here.
class Point(models.Model):
name =models.TextField()
area = models.ForeignKey('area.Area', on_delete=models.CASCADE)
latitude=models.CharField(max_length=200)
longitude=models.CharField(max_length=200)
timestamp=models.DateTimeField(auto_now=False,auto_now_add=True)
updated=models.DateTimeField(auto_now=True,auto_now_add=False)
user = models.ForeignKey(settings.AUTH_USER_MODEL )
def __str__(self):
return self.name
I want a result like following:
{
"id": 3,
"phone_number": "[phone]",
"name": "Ak",
"organisation": "sp",
"group": 1,
"areas": [
{
"id": 1,
"areaName": "Area 51",
"user": 1
points:[{
}]
},
{
"id": 2,
"areaName": "Rrea 343",
"user": 1
point:[{}]
}
]
},
{
"id": 4,
"phone_number": "[phone]",
"name": "Chitra Sahu",
"organisation": "sd",
"group": 2,
"areas": [
{
"id": 1,
"areaName": "Area 51",
"user": 1
point:[{
latitude:'23.2323',
longitude:'23.2323'
},
{
latitude:'21.1223',
longitude:'32.34345'
}
]
},
{
"id": 2,
"areaName": "Rrea 343",
"user": 1
point:[{
latitude:'23.2323',
longitude:'23.2323'
},
{
latitude:'21.1223',
longitude:'32.34345'
}]
}
]
},
So Far I have tried the following
class AreasSerializer(serializers.ModelSerializer):
class Meta:
model=Area
fields=('id','areaName','user')
class AreasUserSerializer(serializers.ModelSerializer):
areas = AreasSerializer(many=True, read_only=True)
class Meta:
model = UserProfile
fields = ('id','phone_number','name','organisation','group','areas')
class AreasUserPointSerializer(serializers.ModelSerializer):
areasUsers=AreasUserSerializer()
class Meta:
model=Point
fields =('id','areasUsers' )
Views
'''Fetch list all question '''
class AreasPointsUsersListApiView(ListAPIView):
serializer_class=serializers.AreasUserPointSerializer
def get_queryset(self):
queryset=UserProfile.objects.all()
user=self.request.query_params.get('user_id',None)
if user is not None:
queryset = queryset.filter(id=user)
#if areas is not None:
# queryset = queryset.filter(areas=areas)
return queryset
.py
This code is not working properly.
I need to serialize it so that the Users consists Areas based on Many to Many relationship. These areas are linked to point using the foreign key in Point.
EDIT
Edit:
Areas serializer

Answer 1

I have resolved this using LocationSerializer which invoked by AreasSerializer.
I am sharing the code snippet. It was pretty easy.
class PointSerializer(serializers.ModelSerializer):
class Meta:
model = Point
fields=('id','latitude','longitude')
class AreasLocationSerializer(serializers.ModelSerializer):
points = PointSerializer(many =True, read_only=True)
class Meta:
model=Area
fields=('id','areaName','points','user')
class AreasUserLocationSerializer(serializers.ModelSerializer):
areas =AreasLocationSerializer(many=True, read_only=True)
class Meta:
model=UserProfile
fields =('id','phone_number','name','areas')