我用DRF创建了一个Rest API。一切正常,但一个资源(shoppingListItems(总是抛出此错误:
类型错误
at/v1/shoppingListItems/
需要类似字节的对象,而不是"str">
请求方法:获取
请求网址:http://localhost:8000/v1/shoppingListItems/
姜戈版本:2.2.7
异常类型:类型错误
异常值: 需要类似字节的对象,而不是"str">
仅当一个或多个项目匹配时,才会出现问题。如果结果集为空,则没有错误。
这是我 views.py:
class ShoppingListViewSet(viewsets.ModelViewSet):
queryset = ShoppingList.objects.all()
serializer_class = ShoppingListSerializer
class ItemViewSet(viewsets.ModelViewSet):
queryset = Item.objects.all()
serializer_class = ItemSerializer
class ShoppingListItemViewSet(viewsets.ModelViewSet):
queryset = ShoppingListItem.objects.all()
serializer_class = ShoppingListItemSerializer
这是我的 models.py:
class Item(models.Model):
id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
name = models.CharField(max_length=200)
def __str__(self):
return self.name
class ShoppingList(models.Model):
id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
name = models.CharField(max_length=200)
members = models.ManyToManyField(User, through='Membership')
items = models.ManyToManyField(Item, through='ShoppingListItem')
def __str__(self):
return self.name
class ShoppingListItem(models.Model):
id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
shoppinglist = models.ForeignKey(ShoppingList, on_delete=models.CASCADE)
item = models.ForeignKey(Item, on_delete=models.CASCADE)
amount = models.IntegerField()
price = models.FloatField(null=True)
status = models.BinaryField()
这是我的 serializers.py:
class ItemSerializer(serializers.HyperlinkedModelSerializer):
class Meta:
model = Item
fields = ['id', 'name']
class ShoppingListSerializer(serializers.HyperlinkedModelSerializer):
class Meta:
model = ShoppingList
fields = ['id', 'name', 'members']
class ShoppingListItemSerializer(serializers.HyperlinkedModelSerializer):
class Meta:
model = ShoppingListItem
fields = ['id', 'shoppinglist', 'item', 'amount', 'price', 'status']
我不知道出了什么问题,我将不胜感激。
谢谢。
这是因为您的类购物列表项中的状态字段(BinaryField(。
尝试将其更改为CharField。