類型為'NoneType'的Python參數不可迭代

Question

發布以下json時出現錯誤： {"email":"test@test.com", "password":"12345", "repeatPassword":"12345"}

我正在使用Django-Rest_framework，所以我想可能設置了錯誤？

這是序列化器

class UserSerializer(serializers.ModelSerializer):
    repeatPassword = serializers.CharField(write_only=True, required=True, label="Re-enter Password")
    def validate(self, attrs):
        passwordValue = attrs["password"]
        repeatPasswordValue = attrs["repeatPassword"]


        if passwordValue is not None and passwordValue != "":
            if repeatPasswordValue is None or repeatPasswordValue == "":
                raise serializers.ValidationError("Please re-enter your password")

        if passwordValue != repeatPasswordValue:
            serializers.ValidationError("Passwords must match")

        return attrs

    class Meta:
        model = User
        fields = ("email", "username", "password")
        read_only_fields = ("username",)
        write_only_fields = ("password",)

該視圖只是我擁有的User模型的基本ModelViewSet

也許我沒有正確配置url.py文件？ 這就是我所擁有的urlpatterns。

urlpatterns = patterns('',
    (r'^user/$', UserViewSet.as_view({"get": "list", "put": "create"})))

Answer 1

看來您可能已經省略了一些代碼。 我遇到了同樣的問題，導致驗證器函數未返回attrs變量，因此我的代碼如下所示：

def validate_province(self, attrs, source):
    // unimportant details

這解決了它：

...
    def validate_province(self, attrs, source):
        // unimportant details
        return attrs
...

---

附帶說明，您忘了提出例外之一：

...
    if passwordValue != repeatPasswordValue:
        serializers.ValidationError("Passwords must match")
...

更改為：

...
    if passwordValue != repeatPasswordValue:
        raise serializers.ValidationError("Passwords must match")
...