title: 'NoneType' object has no attribute '_meta'
body: <p>I am trying to build register api. Here i am stuck with the problem and hoping you guys will address my mistake and will lead me to right way. Anyway thanks in advance. Hoping for your soon response. Thank you .</p>
  
  <p><strong>serializers.py</strong></p>
  
  <pre><code>from django.contrib.auth.models import User
  from rest_framework import serializers
  
  
  class UserSerializer(serializers.HyperlinkedModelSerializer):
      class Meta:
          model = User
          fields = ('id', 'username', 'email', 'password')
          extra_kwargs = {'password': {'write_only': True}}
  
      def create(self, validated_data):
          """ Create and return a new user"""
          user = User.objects.create_user(**validated_data)
          return user
  </code></pre>
  
  <p><strong>models.py</strong></p>
  
  <pre><code>from django.db import models
  from django.contrib.auth.base_user import AbstractBaseUser
  from django.contrib.auth.models import PermissionsMixin
  from django.contrib.auth.models import BaseUserManager
  from django.contrib.auth import get_user_model
  
  
  class UserRegisterManager(BaseUserManager):
      """ Helps django work with our custom user model """
  
      def createUser(self, email, name, password=None):
          """ Creates a new user profile object """
  
          if not email:
              raise ValueError("User must have an email address.")
  
          email = self.normalize_email(email)
          user = self.model(email=email, name=name)
  
          user.set_password(password)  # set_password helps to convert str into hash
          user.save(using=self._db)
          return user
  
      def create_superuser(self, email, name, password):
          """ Creates and saves a new superuser with given details. """
  
          user = self.create_user(email, name, password)
  
          user.is_superuser = True
          user.is_staff = True
  
          user.save(using=self._db)
  
          return user
  
  
  class UserRegister(AbstractBaseUser, PermissionsMixin):
      """ Represents a 'user register' inside our system """
      email = models.EmailField(max_length=255, unique=True)
      name = models.CharField(max_length=255)
      is_active = models.BooleanField(default=True)  # user is currently active or not
      is_staff = models.BooleanField(default=False)
  
      objects = UserRegisterManager()
  
      USERNAME_FIELD = 'email'
      REQUIRED_FIELDS = ['name']
  
      def get_full_name(self):
          """ Used to get user fullname """
  
          return self.name
  
      def get_short_name(self):
          """ Used to get user short name """
  
          return self.name
  
      def __str__(self):
          """ Django uses this when it need to convert the object to a string """
  
          return self.email
  </code></pre>
  
  <p>this is my model</p>
  
  <p><strong>views.py</strong></p>
  
  <pre><code>    from django.contrib.auth.models import User
  
  from rest_framework import viewsets
  from rest_framework.authentication import TokenAuthentication
  
  from .serializers import UserSerializer
  from . import permissions
  from django.contrib.auth import get_user_model
  
  User = get_user_model()
  
  
  class UserViewSet(viewsets.ModelViewSet):
      """ API endpoint that allows users to be viewed or edited. """
  
      serializer_class = UserSerializer
      queryset = User.objects.all()
      # authentication_classes = (TokenAuthentication,)
      # permission_classes = (permissions.UpdateProfile,)
  </code></pre>
  
  <p><strong>setting.py</strong></p>
  
  <pre><code>AUTH_USER_MODEL = 'register.UserRegister'
  </code></pre>
  
  <p>this helps to switch to costume user.</p>
  
  <p><strong>admin.py</strong></p>
  
  <pre><code>from django.contrib import admin
  
  from .models import UserRegister
  
  admin.site.register(UserRegister)
  </code></pre>
  
  <p>And this is how i register my model </p>
  
  <p><strong>Error</strong></p>
  
  <p><a href="https://i.stack.imgur.com/fOYiI.png" rel="nofollow noreferrer">This is error</a></p>
  
  <pre><code>Environment:
  
  Request Method: GET
  Request URL: http://127.0.0.1:8000/api/register/
  
  Django Version: 2.1.5
  Python Version: 3.7.1
  Installed Applications:
  ['django.contrib.admin',
   'django.contrib.auth',
   'django.contrib.contenttypes',
   'django.contrib.sessions',
   'django.contrib.messages',
   'django.contrib.staticfiles',
   'rest_framework',
   'rest_framework.authtoken',
   'register',
   'corsheaders']
  Installed Middleware:
  ['django.middleware.security.SecurityMiddleware',
   'django.contrib.sessions.middleware.SessionMiddleware',
   'django.middleware.common.CommonMiddleware',
   'django.middleware.csrf.CsrfViewMiddleware',
   'django.contrib.auth.middleware.AuthenticationMiddleware',
   'django.contrib.messages.middleware.MessageMiddleware',
   'django.middleware.clickjacking.XFrameOptionsMiddleware',
   'corsheaders.middleware.CorsMiddleware',
   'django.middleware.common.CommonMiddleware']
  
  
  
  Traceback:
  
  File "C:\Users\Pashupati Pariyar\Desktop\Django + Angular\Backend\api\lib\site-packages\django\core\handlers\exception.py" in inner
    34.             response = get_response(request)
  
  File "C:\Users\Pashupati Pariyar\Desktop\Django + Angular\Backend\api\lib\site-packages\django\core\handlers\base.py" in _get_response
    156.                 response = self.process_exception_by_middleware(e, request)
  
  File "C:\Users\Pashupati Pariyar\Desktop\Django + Angular\Backend\api\lib\site-packages\django\core\handlers\base.py" in _get_response
    154.                 response = response.render()
  
  File "C:\Users\Pashupati Pariyar\Desktop\Django + Angular\Backend\api\lib\site-packages\django\template\response.py" in render
    106.             self.content = self.rendered_content
  
  File "C:\Users\Pashupati Pariyar\Desktop\Django + Angular\Backend\api\lib\site-packages\rest_framework\response.py" in rendered_content
    72.         ret = renderer.render(self.data, accepted_media_type, context)
  
  File "C:\Users\Pashupati Pariyar\Desktop\Django + Angular\Backend\api\lib\site-packages\rest_framework\renderers.py" in render
    733.         context = self.get_context(data, accepted_media_type, renderer_context)
  
  File "C:\Users\Pashupati Pariyar\Desktop\Django + Angular\Backend\api\lib\site-packages\rest_framework\renderers.py" in get_context
    663.         raw_data_post_form = self.get_raw_data_form(data, view, 'POST', request)
  
  File "C:\Users\Pashupati Pariyar\Desktop\Django + Angular\Backend\api\lib\site-packages\rest_framework\renderers.py" in get_raw_data_form
    574.                 data = serializer.data.copy()
  
  File "C:\Users\Pashupati Pariyar\Desktop\Django + Angular\Backend\api\lib\site-packages\rest_framework\serializers.py" in data
    563.         ret = super(Serializer, self).data
  
  File "C:\Users\Pashupati Pariyar\Desktop\Django + Angular\Backend\api\lib\site-packages\rest_framework\serializers.py" in data
    266.                 self._data = self.get_initial()
  
  File "C:\Users\Pashupati Pariyar\Desktop\Django + Angular\Backend\api\lib\site-packages\rest_framework\serializers.py" in get_initial
    413.             for field in self.fields.values()
  
  File "C:\Users\Pashupati Pariyar\Desktop\Django + Angular\Backend\api\lib\site-packages\rest_framework\serializers.py" in fields
    363.             for key, value in self.get_fields().items():
  
  File "C:\Users\Pashupati Pariyar\Desktop\Django + Angular\Backend\api\lib\site-packages\rest_framework\serializers.py" in get_fields
    1024.         info = model_meta.get_field_info(model)
  
  File "C:\Users\Pashupati Pariyar\Desktop\Django + Angular\Backend\api\lib\site-packages\rest_framework\utils\model_meta.py" in get_field_info
    39.     forward_relations = _get_forward_relationships(opts)
  
  File "C:\Users\Pashupati Pariyar\Desktop\Django + Angular\Backend\api\lib\site-packages\rest_framework\utils\model_meta.py" in _get_forward_relationships
    96.                 not field.remote_field.through._meta.auto_created
  
  Exception Type: AttributeError at /api/register/
  Exception Value: 'NoneType' object has no attribute '_meta'
  </code></pre>