DRF many serialization and deserialization

Serialization

Process out of the library, the data is read from the database and in the form of front-end for the json
Deserialization

The storage process, the incoming data is from the front end to views.py function or class spooled logic processing, the final written to the database.
Installation djangorestframework

pip install djangorestframework

INSTALLED_APPS = [
    ...
    'rest_framework',
]

Configuration database

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'tutorial',
        'HOST': '127.0.0.1',
        'PORT': 3306,
        'USER': 'root',
        'PASSWORD': 'ocnt-123',
        'OPTIONS':{
                "init_command":"SET foreign_key_checks = 0;",# 禁用外键约束
        }
    }
}

新增老师类和学生类

from django.db import models

# 创建老师模型
class Teacher(models.Model):
    # 教师名称
    name = models.CharField(max_length=32,unique=True)
    # 添加时间
    addtime = models.DateTimeField(auto_now_add=True)

    class Meta:
        # 指定表名
        db_table = 'teacher'


# 创建学生模型,一个学生只能选择一个老师
class Student(models.Model):
    # 学生名称
    name = models.CharField(max_length=32,unique=True)
    # 添加时间
    addtime = models.DateTimeField(auto_now_add=True)
    # 外键 与Teacher类绑定
    teacher = models.ForeignKey('Teacher',on_delete=models.CASCADE)

    class Meta:
        # 指定表名
        db_table = 'student'

新增视图函数类 TeacherView

from rest_framework.views import  APIView
from rest_framework.response import Response
from .serializers import TeacherSerializer,StudentSerializer
from . import models

# 创建用户视图类
class TeacherView(APIView):
    # 获取用户信息
    def get(self,request):
        data = models.Teacher.objects.all()
        info = TeacherSerializer(data,many=True)
        return Response({
            "status":200,
            "msg":"",
            "data":info.data
        })



    # 添加用户
    def post(self,request):
        data = request.data
        flag = models.Teacher.objects.create(**data)
        if not flag:
            return Response({"status":201,"msg":"添加数据失败","data":[]})
        return Response({"status":200,"msg":"","data":[]})



    # 编辑用户
    def put(self,request):
        id = request.data.pop("id")
        flag = models.Teacher.objects.filter(id=id).update(**request.data)
        if not flag:
            return Response({
                "status":201,
                "msg":"编辑失败",
                "data":[]
            })
        return Response({
            "status":200,
            "msg":"编辑成功",
            "data":""
        })


    # 删除用户
    def delete(self,request):
        id = request.data.pop('id')
        teacher = models.Teacher.objects.filter(id=id).delete()
        if not teacher[0]:
            return Response({
                "status": 201,
                "msg": "删除失败",
                "data": []
            })
        return Response({
            "status": 200,
            "msg": "删除成功",
            "data": ""
        })

新增视图函数类 StudentView

# 学生视图
class StudentView(APIView):
    # 获取数据
    def get(self,request):
        data = models.Student.objects.all()
        info = StudentSerializer(data,many=True)

        return Response({
            "status":200,
            "msg":"",
            "data":info.data
        })

    # 添加数据
    def post(self,request):
        data = request.data
        flag = models.Student.objects.create(**data)
        if not flag:
            return Response({
                "status":201,
                "msg":"学生添加失败",
                "data":[]
            })
        return Response({
            "status":200,
            "msg":"学生添加成功",
            "data":[]
        })


    # 编辑数据
    def put(self,request):
        id = request.data.pop('id')
        flag = models.Student.objects.filter(id=id).update(**request.data)
        if not flag:
            return Response({
                "status":201,
                "msg":"数据编辑失败",
                "data":[]
            })
        return Response({
            "status":200,
            "msg":"数据编辑成功",
            "data":[]
        })

    # 删除数据
    def delete(self,request):
        id = request.data.get('id')
        student = models.Student.objects.filter(id=id).delete()
        if not student[0]:
            return Response({
                "status":201,
                "msg":"删除失败",
                "data":[]
            })
        return Response({
            "status":200,
            "msg":"删除成功",
            "data":[]
        })

序列化类 serializers.py

from rest_framework import serializers
from . import models

# 老师数据序列化
class TeacherSerializer(serializers.ModelSerializer):
    class Meta:
        model = models.Teacher
        fields = '__all__'


# 学生数据序列化
class StudentSerializer(serializers.ModelSerializer):
    class Meta:
        model = models.Student
        fields = '__all__'

二级路由 urls.py

from django.urls import path
from . import views
urlpatterns = [
    path('teacher/',views.TeacherView.as_view()),
    path('student/',views.StudentView.as_view()),
]

address
- GET http://127.0.0.1:8000/snippets/teacher/
- POST http://127.0.0.1:8000/snippets/teacher/
- PUT http://127.0.0.1:8000/snippets/teacher/
- DELETE http://127.0.0.1:8000/snippets/teacher/
- GET http://127.0.0.1:8000/snippets/student/
- POST http://127.0.0.1:8000/snippets/student/
- PUT http://127.0.0.1:8000/snippets/student/
- DELETE http://127.0.0.1:8000/snippets/student/

Gets the name of the teacher how many students

serializers.py

from rest_framework import serializers
from . import models

# 学生数据序列化
class StudentSerializer(serializers.ModelSerializer):
    class Meta:
        model = models.Student
        fields = '__all__'


# 老师数据序列化
class TeacherSerializer(serializers.Serializer):
    id = serializers.IntegerField()
    name = serializers.CharField(max_length=32)
    student_set = StudentSerializer(many=True,read_only=True)

Call this address GET http://127.0.0.1:8000/snippets/teacher/

Obtain student teacher who is?

serializers.py

from rest_framework import serializers
from . import models

# 学生数据序列化
class StudentSerializer(serializers.ModelSerializer):
    teacherName = serializers.CharField(source='teacher.name')
    class Meta:
        model = models.Student
        fields = ('id','name','teacherName')


# 老师数据序列化
class TeacherSerializer(serializers.Serializer):
    id = serializers.IntegerField()
    name = serializers.CharField(max_length=32)
    student_set = StudentSerializer(many=True,read_only=True)

Call this address GET http://127.0.0.1:8000/snippets/teacher/

DRF many serialization and deserialization

DRF many serialization and deserialization

Guess you like