有什么方法可以将某些特定字段从一个序列化程序获取到另一个序列化程序？

Question

我希望所有数据从 EmployeeLiteSerializer 除了指定数据到 BankInfoSerializer 没有 detete get_designation_data 方法

 class EmployeeLiteSerializer(serializers.ModelSerializer):
        designation_data = serializers.SerializerMethodField(read_only=True)
    
        class Meta:
            model = Employee
            fields = ('first_name', 'last_name', 'code', 'designation_data')
    
        def get_designation_data(self, obj: Employee) -> Dict:
            try:
                return DesignationLiteSerializer(obj.designation).data
            except Designation.DoesNotExist:
                return {'message': 'No designation'}

    class BankInfoSerializer(serializers.ModelSerializer):
        employee = serializers.SerializerMethodField(read_only=True)
    
        class Meta:
            model = BankInfo
            fields = '__all__'
    
        def get_employee(self, obj: Employee) -> Dict:
            return EmployeeLiteSerializer(obj.employee).data

Answer 1

为没有 designation_data 的员工使用新的序列化程序。

# change the name to what you want
class BankInfoEmployeeSerializer(serializers.ModelSerializer):

    class Meta:
        model = Employee
        fields = ('first_name', 'last_name', 'code')


class BankInfoSerializer(serializers.ModelSerializer):
    employee = serializers.SerializerMethodField(read_only=True)

    class Meta:
        model = BankInfo
        fields = '__all__'

    def get_employee(self, obj: Employee) -> Dict:
        return BankInfoEmployeeSerializer(obj.employee).data

如果 employee 是 BankInfo 上的一个字段，您可以直接使用它而无需 SerializerMethodField

Answer 2

您可以删除指定信息：

class BankInfoSerializer(serializers.ModelSerializer):
    employee = serializers.SerializerMethodField(read_only=True)
    
    class Meta:
        model = BankInfo
        fields = '__all__'

    def get_employee(self, obj: Employee) -> Dict:
        employe_data = EmployeeLiteSerializer(obj.employee).data
        if 'designation_data' in employe_data:
            del employe_data['designation_data']
        
        return employe_data

有什么方法可以将某些特定字段从一个序列化程序获取到另一个序列化程序？

Is there any way to get some specific fields from a serializer to another serializer?

django

rest

serialization

django-rest-framework