Django Rest框架 - 爲JSON添加字段

Question

現在我返回一個帶有模型字段及其值的JSON文件。我想向模型中不存在的JSON添加一些額外的字段（我想添加一個新字段，該字段指定用戶是否可以根據視圖的權限修改診斷）。我如何做到這一點？

models.py

class Diagnostic(models.Model): 
    Center = models.TextField(blank=True) 
    Author = models.TextField(blank=True) 
    Email = models.EmailField(blank=True) 
    Date = models.DateField(null = True, blank=True) 

views.py

class DiagnosticViewSet(viewset.ModelViewSet): 
    model = Diagnostic 
    permission_classes = [GroupPermission] 

serializers.py

class DiagnosticSerializer(serializers.ModelSerializer): 
    class Meta: 
     model = Diagnostic 

Answer 1

添加到您的意見

def list(self, request, *args, **kwargs): 
    response = super(Classname, self).list(request, *args, **kwargs) 
    try: 
     response.data['permission'] = 'give your permission' 
    except: 
     pass 
    return response 

Answer 2

您將它們添加到串行器。

class DiagnosticSerializer(serializers.ModelSerializer): 
    auth_status = serializers.SerializerMethodField('get_auth_status') 
    class Meta: 
     model = Diagnostic 

    def get_auth_status(self, obj): 
     if obj.has_auth(): 
      return True 
     return False 

Answer 3

你必須使用下面的鏈接本地主機代碼/診斷/ 1

from rest_framework.response import Response 

def retrieve(self, request, *args, **kwargs): 
    self.object = self.get_object() 
    serializer = self.get_serializer(self.object) 
    data = serializer.data 
    data['permission'] = 'give your permission' 
    return Response(data)