I'm using DRF and I'm stuck at creating a nested serializer for many to many realtionship:

[Pratap Padekar]

1. here are my models:
2. [10:23 PM]

   class StreamPlatfrom(models.Model): name = models.CharField(max_length=100) about = models.CharField(max_length=150, null=True) website = models.URLField() id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False, unique=True) createdAt = models.DateTimeField(auto_now_add=True) def __str__(self) -> str: return self.name class WatchList(models.Model): title = models.CharField(max_length=150) storyline = models.TextField() active = models.BooleanField() releaseDate = models.DateField() releaseYear = models.IntegerField() stream = models.ManyToManyField(StreamPlatfrom) id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False, unique=True) createdAt = models.DateTimeField(auto_now_add=True) def __str__(self) -> str: return self.title

1. 1. and here are my serializer:
   2. [10:23 PM]

      # WatchListSerializer class WatchListSerializer(serializers.ModelSerializer): reviews = ReviewSerializer(many=True, read_only=True) class Meta: model = WatchList fields = ("__all__") depth = 1 def create(self, validated_data): stream_data = validated_data.pop('stream', []) print("Stream_data", stream_data) watchlist = WatchList.objects.create(**validated_data) for stream in stream_data: stream_obj = StreamPlatfrom.objects.get(name=stream['name']) watchlist.stream.add(stream_obj) return watchlist # StreamPlatformSerializer class StreamPlatformSerializer(serializers.ModelSerializer): class Meta: model= StreamPlatfrom fields = ("__all__")
   3. [10:23 PM]

      For some reason the create method is not working
   4. [10:24 PM]

      When I add stream it returns an empty array

[Chetan Ganji]

Hey,

Always send properly formatted code. 

class StreamPlatfrom(models.Model):

name = models.CharField(max_length=100)

about = models.CharField(max_length=150, null=True)

website = models.URLField()

id = models.UUIDField(

primary_key=True, default=uuid.uuid4, editable=False, unique=True

)

createdAt = models.DateTimeField(auto_now_add=True)

def __str__(self) -> str:

return self.name

class WatchList(models.Model):

title = models.CharField(max_length=150)

storyline = models.TextField()

active = models.BooleanField()

releaseDate = models.DateField()

releaseYear = models.IntegerField()

stream = models.ManyToManyField(StreamPlatfrom)

id = models.UUIDField(

primary_key=True, default=uuid.uuid4, editable=False, unique=True

)

createdAt = models.DateTimeField(auto_now_add=True)

def __str__(self) -> str:

return self.title

# WatchListSerializer

class WatchListSerializer(serializers.ModelSerializer):

reviews = ReviewSerializer(many=True, read_only=True)

class Meta:

model = WatchList

fields = "__all__"

depth = 1

def create(self, validated_data):

stream_data = validated_data.pop("stream", [])

print("Stream_data", stream_data)

watchlist = WatchList.objects.create(**validated_data)

for stream in stream_data:

stream_obj = StreamPlatfrom.objects.get(name=stream["name"])

watchlist.stream.add(stream_obj)

return watchlist

# StreamPlatformSerializer

class StreamPlatformSerializer(serializers.ModelSerializer):

class Meta:

model = StreamPlatfrom

fields = "__all__"

I dont see   ReviewSerializer  anywhere in the code. 
I dont see a serializer for stream objects either.

Answer to your question lies in the below page.
https://www.django-rest-framework.org/api-guide/serializers/#serializers

Thanks!


Regards,

Chetan Ganji

+91-900-483-4183

ganji....@gmail.com

http://ryucoder.in

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