title: Django API: Problem with Displaying a Field
body: <p>I am a beginner in Django. Right now, I am working with the APIs. I am facing a problem. I can't view one of the fields, called <code>label</code>, at <a href="http://127.0.0.1:8000/gameapi/" rel="nofollow noreferrer">http://127.0.0.1:8000/gameapi/</a>. Here is the screenshot:
  <a href="https://i.stack.imgur.com/xUStZ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xUStZ.png" alt="enter image description here"></a>
  Here are my codes of <code>serializers.py</code> located inside <strong>gamreview</strong> folder. </p>
  
  <pre><code>from rest_framework import serializers
  from .models import Game, Tags
  
  
  class TagSerializer(serializers.ModelSerializer):
      class Meta:
          model = Tags
          fields = ['label']
  
  class GameSerializer(serializers.ModelSerializer):
      # label_tag = TagSerializer(many=True)
      class Meta:
          model = Game
          fields = ['id', 'title', 'developer', 'platform']
          fields = ['id', 'title', 'developer', 'platform','label_tag']
  
  def create(self, validated_data):
      label_tag_data = validated_data.pop('label_tag')
      game = Game.objects.create(**validated_data)
      for tags_data in label_tag_data:
          Tags.objects.create(game=game, **tags_data)
      return Game.objects.create(**validated_data)
  
  def update(self, instance, validated_data):
      instance.title = validated_data.get('title', instance.title)
      instance.developer = validated_data.get('developer', instance.developer)
      instance.platform = validated_data.get('platform', instance.platform)
      instance.tag = TagSerializer(read_only=True, many=True)
      instance.save()
      return instance
  </code></pre>
  
  <p>Here are my codes of <code>models.py</code> under <strong>gamreview</strong> folder:</p>
  
  <pre><code>from django.db import models
  from django.template.defaultfilters import slugify
  
  # Create your models here.
  
  class Tags(models.Model):
      label = models.CharField(max_length=20)
  
      def __str__(self):
          return self.label
  
  
  class Game(models.Model):
      title = models.CharField(max_length=100)
      developer = models.CharField(max_length=100)
      platform = models.CharField(max_length=50, default='null')
      label_tag = models.ManyToManyField(Tags)
      slug = models.SlugField(max_length=150, default='null')
  
      def __str__(self):
          return self.title
  
      def save(self, *args, **kwargs):
          self.slug = slugify(self.title)
          super().save(*args, **kwargs)
  
  
  class Review(models.Model):
      game = models.ForeignKey(Game, on_delete=models.CASCADE)
      review = models.CharField(max_length=1000)
      date = models.DateField(auto_now=True)
      slug = models.SlugField(max_length=150, default='null')
  
      def __str__(self):
          return self.game
  </code></pre>
  
  <p>Here are my codes of <code>views.py</code> under <strong>gamreview</strong> folder:</p>
  
  <pre><code>from django.views import generic
  from .models import Game
  from rest_framework import generics
  from .serializers import GameSerializer
  
  
  # Create your views here.
  
  
  class GameListView(generic.ListView):
      template_name = 'gamereview/gamelist.html'
      context_object_name = 'all_games'
  
      def get_queryset(self):
          return Game.objects.all()
  
  
  class ReviewView(generic.DetailView):
      model = Game
      template_name = 'gamereview/review.html'
  
  # class GameApiView(generics.ListAPIView):
  class GameApiView(generics.ListCreateAPIView):
      queryset = Game.objects.all()
      serializer_class = GameSerializer
  
  class GameDetailApiView(generics.RetrieveUpdateDestroyAPIView):
      queryset = Game.objects.all()
      serializer_class = GameSerializer
  </code></pre>
  
  <p>Here are my codes of <code>urls.py</code> under <strong>gamreview</strong> folder: </p>
  
  <pre><code>from . import views
  from django.urls import path
  
  app_name = 'gamereview'
  
  urlpatterns = [
      path('gamereview/', views.GameListView.as_view(), name='gamelist'),
      path('gamereview/&lt;slug:slug&gt;/', views.ReviewView.as_view(), name='review'),
      path('gameapi/', views.GameApiView.as_view(), name='gamelistapi'),
      path('gameapi/&lt;int:pk&gt;/', views.GameDetailApiView.as_view()),
  
  
  ]
  </code></pre>
  
  <p>I don't get any error while running the server. However, the <code>label</code> field is not showing up.
  How can I fix the issue?</p>