Django的Asse田

Question

AssertionError at /api/purchases/person/ 

    It is redundant to specify `source='name'` on field 'Field' in 
serializer 'PurchaseSerializer', because it is the same as the field name. 
Remove the `source` keyword argument. 

我以为它指的是这个代码，因为我没有使用“源”其他地方：

class PurchaseSerializer(serializers.HyperlinkedModelSerializer): 
    name = serializers.Field(source='name') 

    class Meta: 
     model = Purchase 
     fields = ['name'] 

我想能够过滤通过的“人”的购买，所以我只能看到他们的购买，但由于某种原因，当我键入一个存在于数据库中的人时，会出现类似上面的断言错误。如果我键入一个数据库中不存在的人，它将不会引发错误，但会返回一个空的JSON。这应该反之亦然，但不知道为什么这不起作用。

Models.py

class Purchase(models.Model): 
     name = models.CharField(max_length=255) 

Urls.py

url(r'^api/purchases/(?P<username>.+)/$', views.PurchaseList.as_view()), 

Views.py

class PurchaseList(generics.ListAPIView): 
    serializer_class = PurchaseSerializer 

    def get_queryset(self): 
     """ 
     This view should return a list of all the purchases for 
     the user as determined by the username portion of the URL. 
     """ 
     username = self.kwargs['username'] 
     return Purchase.objects.filter(name=username) 

Answer 1

尝试作为错误消息表明除去source关键字参数：

class PurchaseSerializer(serializers.HyperlinkedModelSerializer): 
    name = serializers.Field()