django-rest-framework - 如何从django rest框架中的多个模型获取数据

Question

我是 Django Rest API 的新手，所以请帮忙。

我有两个模型:

class Department(models.Model):
    name = models.CharField(max_length = 50)
    location = models.CharField(max_length=20)
    dept_code = models.CharField(max_length=5)

class Employee(models.Model):
    name = models.CharField(max_length = 50)
    email = models.EmailField()
    mobile = models.CharField(max_length=10)
    department = models.ForeignKey(Department, on_delete= models.CASCADE)'

而各自的序列化器是:

class EmployeeSerializer(serializers.ModelSerializer):
    class Meta:
        model = Employee
        fields = '__all__'

class DepartmentSerializer(serializers.ModelSerializer):
    class Meta:
        model = Department
        fields = '__all__'

我想像这样检索数据

{
    emptId : 1,
    empName : 'John',
    empEmail : 'John@gmail.com',
    empMobile : '1111111111',
    deptId : 1,
    deptName : 'Accounts',
    deptLocation : 'Pune',
    deptCode : 'ACC'
}

如何获取以上数据。请帮助我

Answer 1

在你的Serializers.py

class DepartmentSerializer(serializers.ModelSerializer):
    class Meta:
        model = Department
        fields = '__all__'

class EmployeeSerializer(serializers.ModelSerializer):
    department = DepartmentSerializer(many=False)

    class Meta:
        model = Employee
        fields = ('empId','empName','empEmail','empMobile','department')

使用它您将获得首选的嵌套对象结构。

如果你想得到扁平结构那么

class DepartmentSerializer(serializers.ModelSerializer):
    class Meta:
        model = Department
        fields = '__all__'

class EmployeeSerializer(serializers.ModelSerializer):
    department = DepartmentSerializer(many=False)
    depId = serializers.IntergerField(source='department.id')
    depName = serializers.CharField(source='department.name')
    depLocation = serializers.CharField(source='department.location')
    depCode = serializers.CharField(source='department.dept_code')
    class Meta:
        model = Employee
        fields = ('empId','empName','empEmail','empMobile','depId','depName','depLocation','depCode','department')

希望你能明白如果您不想在 get 方法中使用 department 对象，请在 department 字段的参数中添加 write_only=True。

查看更多 readonly and writeonly

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