DRF 多對多序列化和反序列化

時間 2019-11-20

標籤 drf 多對序列简体版

原文原文鏈接

Django 序列化和反序列化

1、序列化python

查詢全部的學生的信息，包括任課老師django

models.pyrest

from django.db import models

# 學生類
class Student(models.Model):
    name = models.CharField(max_length=32)

    # 老師類
class Teacher(models.Model):
    name = models.CharField(max_length=32)
    students = models.ManyToManyField(to='Student',related_name='teacher')

serializer.pycode

from rest_framework import serializers
from . import models

# 老師序列化
class TeacherSerializer(serializers.ModelSerializer):
    class Meta:
        model = models.Teacher
        fields = ('id','name')
        # 學生序列化
        class StudentSerializer(serializers.Serializer):
            name = serializers.CharField(max_length=32)
            teacher = TeacherSerializer(many=True,read_only=True)

views.pyclass

# 查詢全部的學生對應的老師
studentobj = models.Student.objects.all()
stu = StudentSerializer(studentobj,many=True)
return Response(stu.data)

結果import

[
    {
        "name": "小張",
        "teacher": [
            {
            "id": 3,
            "name": "鄭老師"
            }
        ]
    },
    {
        "name": "小李",
        "teacher": [
        {
            "id": 4,
            "name": "董老師"
            }
        ]
    },
    {
    "name": "小夏",
    "teacher": []
    },
    {
    "name": "小徐",
    "teacher": []
    }
]

查詢全部的老師的信息，包括所教學生object

models.pyList

from django.db import models

# 學生類
class Student(models.Model):
name = models.CharField(max_length=32)

# 老師類
class Teacher(models.Model):
name = models.CharField(max_length=32)
students = models.ManyToManyField(to='Student',related_name='teacher')

serializer.pymodel

from rest_framework import serializers
from . import models

# 學生序列化
class StudentSerializer(serializers.ModelSerializer):
class Meta:
model = models.Teacher
fields = ('id','name')
# 老師序列化
class TeacherSerializer(serializers.Serializer):
name = serializers.CharField(max_length=32)
students = TeacherSerializer(many=True,read_only=True)

views.py序列化

teacherobj = models.Teacher.objects.all()
teach = TeacherSerializer1(teacherobj,many=True)
return Response(teach.data)

結果

[
    {
        "name": "王老師",
        "students": []
        },
        {
        "name": "劉老師",
        "students": []
        },
    {
        "name": "鄭老師",
        "students": [
            {
                "id": 1,
                "name": "小張"
            }
        ]
    },
    {
        "name": "董老師",
        "students": [
            {
            "id": 2,
            "name": "小李"
            }
        ]
    }
]

2、反序列化

老師添加學生

models.py

from django.db import models

# 學生類
class Student(models.Model):
    name = models.CharField(max_length=32)


# 老師類
class Teacher(models.Model):
    name = models.CharField(max_length=32)
    students = models.ManyToManyField(to='Student',related_name='teacher')

serializer.py

# 反序列化
class TeacherUnserializer(serializers.Serializer):
    id = serializers.IntegerField()
    student_id = serializers.ListField()

    def create(self,data):
        tid = data.pop('id')
        student_id = data.pop('student_id')
        teacherobj = models.Teacher.objects.filter(id=tid).first()
        teacherobj.students.set(
            student_id
        )
        return teacherobj

views.py

data = {
    "id":2,
    "student_id":[1,2,3,4]
}
obj = TeacherUnserializer(data=data)
if obj.is_valid():
    obj.save()
print(obj.errors)
return Response('ok')

學生添加老師

models.py

from django.db import models

# 學生類
class Student(models.Model):
    name = models.CharField(max_length=32)

# 老師類
class Teacher(models.Model):
    name = models.CharField(max_length=32)
    students = models.ManyToManyField(to='Student',related_name='teacher')

serializer.py

# 反序列化
class StudentUnserializer(serializers.Serializer):
    id = serializers.IntegerField()
    teacher_id = serializers.ListField()

    def create(self,data):
        id = data.pop('id')
        teacher_id = data.pop('teacher_id')
        studentobj = models.Student.objects.filter(id=id).first()
        studentobj.teacher.set(
            teacher_id
        )
        return studentobj

views.py

data = {
    "id": 2,
    "teacher_id": [1, 2, 3, 4]
}
obj = StudentUnserializer(data=data)
if obj.is_valid():
    obj.save()
print(obj.errors)
return Response('ok')

相關標籤/搜索

每日一句

每一个你不满意的现在，都有一个你没有努力的曾经。