10

我正在尝试使用gender在名为. 当我尝试更新包含嵌套模型实例的模型实例时，它只更新实例（）。所以基本上我想要实现的是能够更新模型中的字段created_atupdated_atUserProfileUserProfileUserUserProfilegender, updated_at fieldsemail, first_name and last_nameUser

模型.py：

class UserProfile(models.Model):
        user = models.OneToOneField(User, primary_key = True, related_name = 'profile')
        gender = models.CharField(choices = GENDERS, default = 2, max_length = 64)
        created_at = models.DateTimeField(auto_now_add = True)
        updated_at = models.DateTimeField(auto_now = True)

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

        @receiver(post_save, sender = User)
        def create_profile_for_user(sender, instance = None, created = False, **kwargs):
                if created:
                        UserProfile.objects.get_or_create(user = instance)

        @receiver(pre_delete, sender = User)
        def delete_profile_for_user(sender, instance = None, **kwargs):
                if instance:
                        user_profile = UserProfile.objects.get(user = instance)
                        user_profile.delete()

序列化程序.py：

class UserProfileSerializer(serializers.ModelSerializer):

        id = serializers.IntegerField(source = 'pk', read_only = True)
        username = serializers.CharField(source = 'user.username', read_only = True)
        email = serializers.CharField(source = 'user.email')
        first_name = serializers.CharField(source = 'user.first_name')
        last_name = serializers.CharField(source = 'user.last_name')

        class Meta:
                model = UserProfile
                fields = (
                        'id', 'username', 'email', 'first_name', 'last_name',
                        'created_at', 'updated_at', 'gender',
                )
                read_only_fields = ('created_at', 'updated_at',)

        def update(self, instance, validated_data):
                #user = User.objects.get(pk = instance.user.pk);        
                user = instance.user
                user.email = validated_data.get('user.email', user.email)
                user.first_name = validated_data.get('user.first_name', user.first_name)
                user.last_name = validated_data.get('user.last_name', user.last_name)
                user.save()

                instance.gender = validated_data.get('gender', instance.gender)
                instance.save()

                return instance

        def create(self, validated_data):

                user_data = validated_data.pop('user')
                user = User.objects.create(**user_data)

                profile = UserProfile.objects.create(user = user, **validated_data)
                return profile

视图.py：

class UserViewSet(viewsets.ModelViewSet):
        queryset = User.objects.all()
        serializer_class = UserSerializer

class UserProfileViewSet(viewsets.ModelViewSet):
        queryset = UserProfile.objects.all()
        serializer_class = UserProfileSerializer
4

2 回答 2

6

我是这样做的：

def update(self, instance, validated_data):
    # First, update the User
    user_data = validated_data.pop('user', None)
    for attr, value in user_data.items():
            setattr(instance.user, attr, value)
    # Then, update UserProfile
    for attr, value in validated_data.items():
        setattr(instance, attr, value)
    instance.save()
    return instance

基本上，我查看了serializers（此处，第 800 行）的原始代码并对其进行了修改，以使其符合我的需要。

祝你好运。

于 2015-04-06T13:05:04.077 回答
3

对上述代码稍作修改，将 None 替换为 {}

因为 'NoneType' 对象没有属性 'items'

def update(self, instance, validated_data):
    # First, update the User
    user_data = validated_data.pop('user', {})
    for attr, value in user_data.items():
        setattr(instance.user, attr, value)
    # Then, update UserProfile
    for attr, value in validated_data.items():
        setattr(instance, attr, value)
    instance.save()
    return instance

我正在实施另一种方法来处理验证。我正在实现它来处理 PATCH

class UserSerializer(serializers.ModelSerializer):
    class Meta:
        model = User
        fields = ('email', 'first_name', 'last_name')

class ProfileSerializer(serializers.ModelSerializer):
    email = serializers.CharField(source='user.email')
    first_name = serializers.CharField(source='user.first_name')
    last_name = serializers.CharField(source='user.last_name')

    class Meta:
        model = Profile
        exclude = ('user',)

    def update(self, instance, validated_data):
        user_data = validated_data.pop('user', {})
        user_serializer = UserSerializer(instance.user, data=user_data, partial=True)
        user_serializer.is_valid(raise_exception=True)
        user_serializer.update(instance.user, user_data)
        super(ProfileSerializer, self).update(instance, validated_data)
        return instance
于 2017-10-31T06:30:25.837 回答