Re: ValueError at /news/ Value: None must be instance of Model:

import proper package you were importing "djongo" it should be "django".

On Sat, Jan 26, 2019 at 8:13 PM <team.alphav3@gmail.com> wrote:

This usually happens when you have added and EmbeddedModel and not passing any value to that field while creation.
Hope this helps.

On Sunday, 19 August 2018 19:32:49 UTC+5:30, Sagar wrote:

Hi,
I'm trying to create embedded documents in mongodb using django. I'm facing this error when I tried to insert a post in database.
"ValueError at /post/Value: None must be instance of Model: <class 'django.db.models.base.Model'>"
Here is my code.
models.py

from djongo import models

# Schema for comments collection which include in belonging post

class Comments(models.Model):

username = models.CharField(max_length=25, blank=False)

comment = models.TextField()

time_stamp = models.DateTimeField(auto_now_add=True)

# Schema for post collection

class Post(models.Model):

username = models.CharField(max_length=25, blank=False)

title = models.CharField(max_length=100, blank=False)

post = models.TextField()

time_stamp = models.DateTimeField(auto_now_add=True)

comments = models.EmbeddedModelField('Comments')

# allows to use all functionality of django orm

objects = models.DjongoManager()

def __str__(self):

return self.post

serializers.py

from rest_framework import serializers

from models import Post, Comments

class PostSerializer(serializers.ModelSerializer):

class Meta:

model = Post

fields = ('id', 'username', 'title', 'post', 'time_stamp')

class CommentsSerializer(serializers.ModelSerializer):

class Meta:

model = Comments

fields = '__all__'

views.py

from rest_framework_mongoengine import generics

from serializers import PostSerializer, CommentsSerializer

from models import Post, Comments

class PostAPIView(generics.CreateAPIView):

lookup_field = 'id'

serializer_class = PostSerializer

def get_queryset(self):

return Post.__objects.all()

class CommentsAPIView(generics.CreateAPIView):

lookup_field = 'id'

serializer_class = CommentsSerializer

def get_queryset(self):

return Comments.__objects.all()

what is the problem with the code? Is this right method to create embedded documents in mongodb?
I used python3.6.4, django2.1, djongo1.2.29 and other libraries like pymongo and mongoengine

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