TypeError: User() 得到了一个意外的关键字参数“confirm_password”

Question

我想将password 字段和confirm_password 字段添加到我的UserSerializer。我编写了一个名为create 的函数来为我的password 字段创建哈希密码，但在它创建哈希密码之前，我希望它确保confirm_password 和password 匹配。如果我删除 confirm_password 字段，代码可以正常工作。有什么问题？

[更新]

我的序列化器.py

# serializer define the API representation
class UserSerializer(serializers.HyperlinkedModelSerializer):

    # password field
    password = serializers.CharField(
        write_only = True,
        required = True,
        help_text = 'Enter password',
        style = {'input_type': 'password'}
    )
    
    # confirm password field
    confirm_password = serializers.CharField(
        write_only = True,
        required = True,
        help_text = 'Enter confirm password',
        style = {'input_type': 'password'}
    )

    class Meta:
        model = User
        fields = [
            'url', 'first_name', 'last_name', 'email',
            'password', 'confirm_password', 'is_staff'
        ]
    
    def create(self, validated_data):
        if validated_data.get('password') != validated_data.get('confirm_password'):
            raise serializers.ValidationError("Those password don't match") 

        elif validated_data.get('password') == validated_data.get('confirm_password'):
            validated_data['password'] = make_password(
                validated_data.get('password')
            )

        return super(UserSerializer, self).create(validated_data)

我遇到的错误

TypeError: User() got an unexpected keyword argument 'confirm_password'

[20/Aug/2020 16:15:44] "POST /users/ HTTP/1.1" 500 168152

浏览器出错

TypeError at /users/
Got a `TypeError` when calling `User.objects.create()`. This may be because you have a writable field on the serializer class that is not a valid argument to `User.objects.create()`. You may need to make the field read-only, or override the UserSerializer.create() method to handle this correctly.

如果您需要更多详细信息，我可以编辑问题。太棒了！

Answer 1

您正在尝试将字段 confirm_password 保存到您的 User 模型中。我相信这个字段只是用来确认密码的，但是User模型真的没有这个字段。

在保存之前尝试从validated_data弹出这个字段：

def create(self, validated_data):
        if validated_data.get('password') != validated_data.get('confirm_password'):
            raise serializers.ValidationError("Those password don't match") 

        elif validated_data.get('password') == validated_data.get('confirm_password'):
            validated_data['password'] = make_password(
                validated_data.get('password')
            )

        validated_data.pop('confirm_password'). # add this
        return super(UserSerializer, self).create(validated_data)

附：验证通常在validate() 方法中完成，而不是在create() 中。

Answer 2

from_the_docs.

尝试分别使用password1 和password2 而不是password 和confirm_passowrd 作为密码字段名称。

Answer 3

您正在create 方法中执行验证。这不是正确的做法。这应该在序列化程序的is_valid 或validate 方法中完成。你的create 方法应该是这样的

def create(self, validated_data):
    # confirm_password should not be sent to create as it is not part of User model
    validated_data.pop('confirm_password', None)
    return super(UserSerializer, self).create(validated_data)