使用序列化程序进行请求解析时出现意外错误

Question

同时从前端解析我的请求数据并使用序列化器转换为JSON格式。我收到一些意外错误。

当使用如下所述的使用序列化器的请求解析模式时，它显示了以下错误：（我发现以下错误使用：contact_serializer.errors]

{'phone_number': {u'non_field_errors': [u'Invalid data. Expected a dictionary, but got str.']}, 'cont_email': {u'non_field_errors': [u'Invalid data. Expected a dictionary, but got str.']}}

我有一个模特：

class RestaurantContactAssociation(models.Model):
    restaurant=models.ForeignKey(Restaurant)
    contact=models.ForeignKey(Contact,null=True,blank=True,related_name="restaurantcontact_association",on_delete=models.SET_NULL)

class PhoneNumber(models.Model):
    contact = models.ForeignKey(Contact,related_name='contact_number')
    number = models.CharField(max_length=255)
    created_at = models.DateTimeField(auto_now_add=True)

class ContactEmail(models.Model):
    contact = models.ForeignKey(Contact,related_name='contact_email')
    email = models.EmailField(max_length=255)
    created_at = models.DateTimeField(auto_now_add=True)

我创建的序列化器是：

class PhoneNumberSerializer(serializers.HyperlinkedModelSerializer):

    class Meta:
        model = PhoneNumber
        fields = ('number')

class ContactEmailSerializer(serializers.HyperlinkedModelSerializer):

    class Meta:
        model = ContactEmail
        fields = ('email')

class CrmContactSerializer(serializers.ModelSerializer):
    phone_number = PhoneNumberSerializer(source = 'contact_number')
    cont_email = ContactEmailSerializer(source = 'contact_email')

    class Meta:
        model = RestaurantContactAssociation
        fields = ('id','phone_number','cont_email','contact')

调用此序列化程序的代码部分：

    request.data['phone_number'] = '9999999999'
    request.data['cont_email'] = '[email protected]'       
    contact_name = request.data.get('c_name',None)

    contact_serializer = CrmContactSerializer(data=request.data)
    if contact_serializer.is_valid():
        contact_serializer.save()

有人可以提出建议，我在哪里错了吗？

更新1：我在contact_serializer.save（）

时收到此错误

更新2：

弹出键错误。

Answer 1

我认为它不会像这样工作。您必须记住，如果您输入这样的值，它将最终存储在DB中，并且它是硬编码的值。即使您坚持要这样做，也要使用字典列表：

request.data['phone_number'] = [{'number': '9999999999'}]
request.data['cont_email'] = [{'email':'[email protected]'}]

并像这样更新序列化器：

class CrmContactSerializer(serializers.ModelSerializer):
    phone_number = PhoneNumberSerializer(source = 'contact_number', many=True)
    cont_email = ContactEmailSerializer(source = 'contact_email', many=True)

    class Meta:
        model = RestaurantContactAssociation
        fields = ('id','phone_number','cont_email','contact')

    def create(self, validated_data):
         phone_number = validated_data.pop('phone_number')
         cont_email = validated_data.pop('cont_email')

         restaurant = super().create(validated_data)
         phone_instance = PhoneNumber(**phone_number)
         phone_instance.restaurant = restaurant
         phone_instance.save()

         email_instance = ContactEmail(**phone_number)
         email_instance.restaurant = restaurant
         email_instance.save()
         return restaurant

many=True的原因是，一个餐厅可以有多个号码或电子邮件（因为它与各个型号具有一对多的关系。

现在，如果您想到正确的实现方式，则可以使phone_number和cont_email只读字段，以便仅在读取而不是在写入时使用它：

class CrmContactSerializer(serializers.ModelSerializer):
    phone_number = PhoneNumberSerializer(source = 'contact_number', read_only=True)
    cont_email = ContactEmailSerializer(source = 'contact_email', read_only=True)

    class Meta:
        model = RestaurantContactAssociation
        fields = ('id','phone_number','cont_email','contact')

这样，可以处理电话号码和连续电子邮件的验证错误。