DRF自定义注册中的user_type额外字段无法保存

我基于dj_rest_auth的RegisterSerializer创建了自定义序列化器，添加了额外的user_type字段，并通过重写get_cleaned_data方法将该字段纳入清洗后的数据，同时配置了对应的自定义注册视图。以下是具体代码：

自定义注册序列化器 #

class CustomRegisterSerializer(RegisterSerializer):

    user_type = serializers.ChoiceField(choices=[('seeker', 'Seeker'), ('recruiter', 'Recruiter')])

    class Meta:
        model = User
        fields = "__all__"

    def get_cleaned_data(self):
        data = super().get_cleaned_data()
        data['user_type'] = self.validated_data.get('user_type', '')
        return data

用户Profile模型 #

class Profile(models.Model):
    class Type(models.TextChoices):
        seeker = "Seeker"
        recruiter = "Recruiter"
    
    base_type = Type.seeker
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    user_type = models.CharField(choices=Type.choices, default=base_type, max_length=20)

    class Meta:
        verbose_name = "Profile"
        verbose_name_plural = "Profiles"

    def __str__(self):
        return self.user.username

自定义注册视图 #

class CustomRegisterView(RegisterView):
    serializer_class = CustomRegisterSerializer

内容的提问来源于stack exchange，提问作者Vicente Antonio G. Reyes