old_contents: from rest_framework import serializers
  
  from api.webview.models import Document
  
  
  class DocumentSerializer(serializers.ModelSerializer):
  
      class Meta:
          model = Document
          fields = ('id', 'providerUpdatedDateTime', 'source', 'docID', 'raw', 'normalized')
  
new_contents: from rest_framework import serializers
  
  from api.webview.models import Document
  
  
  class DocumentSerializer(serializers.ModelSerializer):
  
      class Meta:
          model = Document
          fields = ('key', 'providerUpdatedDateTime', 'source', 'docID', 'raw', 'normalized')
  
subject: remove old reference to id