python - 如何批量插入或创建多个数据

Question

基于我在下面给出的给定数据对象。我想问一下如何在django中批量插入或创建多个数据。我在下面提供了包括我的序列化程序和 python 代码。我想从下面的数据对象中创建/插入每个密码。不要担心其他数据。我也想用序列化器来做。我确实尝试遍历 data: 中 each_employee_data 的数据。我的代码有任何问题。谢谢。

代码

def post(self, request, format=None):
        data = request.data


        print("Data::" , data)

        for each_employee_data in data:
            each_employee_data["verification_code"] = verification_code(self)
            password = hashers.make_password(each_employee_data["password"])
            each_employee_data["password"] = password
            print("each_employee_data", each_employee_data)
            user_serializer = UserSerializer(data= each_employee_data)

        if user_serializer.is_valid(raise_exception=True):

                if not each_employee_data["is_applicant"]:#company
                    company_serializer = CompanySerializer(data=data)
                    if company_serializer.is_valid(raise_exception=True):
                        user_ins = user_serializer.save(password=password)
                        company_serializer.save(user=user_ins)
                else:
                    applicant_serializer = ApplicantSerializer(data=each_employee_data)
                    if applicant_serializer.is_valid(raise_exception=True):
                        user_ins = user_serializer.save(password=password)
                        applicant_serializer.save(user=user_ins)


                send_confirmation.delay(data)
                if not user_ins.is_applicant:
                    send_business_confirmation.delay(data)

序列化器

class UserSerializer(serializers.Serializer):
    id                  = serializers.IntegerField(read_only=True)
    is_staff            = serializers.BooleanField(required=False)
    is_confirmed        = serializers.BooleanField(required=False)
    is_applicant        = serializers.BooleanField(required=False)
    email               = serializers.EmailField(required=True,validators=[UniqueValidator(queryset=User.objects.all(), message="Email already exist.")])
    verification_code   = serializers.CharField(required=False)
    password_reset_code = serializers.CharField(required=False)

    def create(self, validated_data):
        """
        Create and return a new `Snippet` instance, given the validated data.
        """
        password = validated_data.pop("password")


return User.objects.create(password=password,**validated_data)

数据:

[  
   {  
      'mname':'Tap',
      'email':'helloworld@gmail.com',
      'is_applicant':True,
      'lname':'world',
      'fname':'hello',
      'password':'helloworld12345'
   },
   {  
      'mname':'van',
      'email':'haha@gmail.com',
      'is_applicant':True,
      'lname':'asdas',
      'fname':'hellworld124344',
      'password':'asdasdasdas'
   }
]

Answer 1

当一个序列化器被实例化并传入 many=True 时，一个 ListSerializer 实例将被创建。然后序列化器类成为父 ListSerializer 的子类。 ListSerializer 类提供了一次序列化和验证多个对象的行为。

在一些用例中，您可能希望自定义 ListSerializer 行为。在您的情况下，您希望 ListSerializer 进行批量更新。您需要定义一个新的自定义 ListSerializer

class CustomListSerializer(serializers.ListSerializer):
    ...

    def create(self, validated_data):
        ...

class CustomSerializer(serializers.Serializer):
    ...
    class Meta:
        list_serializer_class = CustomListSerializer

你的情况应该是

class UserListSerializer(serializers.ListSerializer):
        ...

        def create(self, validated_data):
            user = [User(**item) for item in validated_data]
            return User.objects.bulk_create(User)



class UserSerializer(serializers.Serializer):
            ...
            class Meta:
                list_serializer_class = UserListSerializer

https://www.django-rest-framework.org/api-guide/serializers/#customizing-listserializer-behavior