CODEWITHSUNDEEP
pythondjangoobjectbulkinsert
user11327631
user11327631

Reputation:

How to bulk insert or create multiple data

Based on the given data object i have put below. I wanted to ask how to bulk insert in django or create multiple data. I have provided below including my serializer and python code. I wanted to create/insert every password from the data object which is in below. Dont worry about the other data. Also i want to do it with serializer. I did try to loop through data which is for each_employee_data in data: . Any problem with my code. Thank you.

code

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)

Serializer

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)

Data:

[  
   {  
      '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'
   }
]

Upvotes: 3

Views: 603

Answers (1)

Deepam Patel
Deepam Patel

Reputation: 190

When a serializer is instantiated and many=True is passed, a ListSerializer instance will be created. The serializer class then becomes a child of the parent ListSerializer. The ListSerializer class provides the behavior for serializing and validating multiple objects at once.

There are a few use cases when you might want to customize the ListSerializer behavior. In your case you want the ListSerializer to do a bulk update. You need to define a new custom ListSerializer

class CustomListSerializer(serializers.ListSerializer):
    ...

    def create(self, validated_data):
        ...

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

In your case it should be

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

Upvotes: 1

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