django rest framework之序列化

首先找到models文件，然后里面写上内容，自定义

class UserGroup(models.Model):
    title = models.CharField(max_length=32)


class UserInfo(models.Model):
    name = models.CharField(verbose_name="姓名",max_length=255)
    age = models.IntegerField(verbose_name="年龄")
    choice = (
        (1, '男人'),
        (2, '女人'),
        (3, '其他')
    )
    sex = models.IntegerField(verbose_name="性别",choices=choice)
    address = models.CharField(verbose_name="地址",max_length=255)
    ug = models.ForeignKey(UserGroup,default=1,on_delete=models.CASCADE)

然后同步数据库，然后往数据库里这两张表添加内容，完毕之后回到视图函数，里面写上代码逻辑，首先定义一个序列化类

from rest_framework import serializers
"""
先要创建一个类继承Serializers
"""
class UserSerializers(serializers.Serializer):
    """序列化字段和数据库必须一样"""
    name = serializers.CharField()
    age = serializers.CharField()
    sex = serializers.IntegerField()
    address = serializers.CharField()
    # source 来源于，就是让页面不再显示对象而是数据库的字段
    ug = serializers.CharField(source='ug.title')

接下来开始写逻辑代码

from rest_framework import views
from rest_framework.views import Response
from app1 import models

class SerializersViews(views.APIView):
    def get(self,request,*args,**kwargs):
        # user_list = models.UserInfo.objects.filter()
        user_list = models.UserInfo.objects.filter()
        # 选择序列化类，如果是多个，many=True，如果是单个，many=False
        sls = UserSerializers(instance=user_list,many=True)
        # sls = UserSerializers(instance=user_list,many=False)
        # sls.data 已经序列化数据库所需字段
        return Response(sls.data)

完整代码如下：

from django.shortcuts import render,HttpResponse
from rest_framework import views
from rest_framework import serializers
from rest_framework.views import Response
from app1 import models
# Create your views here.
"""
先要创建一个类继承Serializers
"""
class UserSerializers(serializers.Serializer):
    """序列化字段和数据库必须一样"""
    name = serializers.CharField()
    age = serializers.CharField()
    sex = serializers.IntegerField()
    address = serializers.CharField()
    # source 来源于，就是让页面不再显示对象而是数据库的字段
    ug = serializers.CharField(source='ug.title')




class SerializersViews(views.APIView):
    def get(self,request,*args,**kwargs):
        # user_list = models.UserInfo.objects.filter()
        user_list = models.UserInfo.objects.filter()
        # 选择序列化类，如果是多个，many=True，如果是单个，many=False
        sls = UserSerializers(instance=user_list,many=True)
        # sls = UserSerializers(instance=user_list,many=False)
        # sls.data 已经序列化数据库所需字段
        return Response(sls.data)

完整代码

写完之后，在你的urls里面写上

from django.contrib import admin
from django.urls import path
from app1 import views

urlpatterns = [
    path('admin/', admin.site.urls),
    path('Serializers/', views.SerializersViews.as_view()), # 添加这一行
]

之后在你的配置文件中

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'app1.apps.App1Config',
    'rest_framework', # 配置上
]

好了，上面完成之后，直接启动系统，网页输入url可以看到内容了，不知道为啥无法粘贴图片了，看代码吧

[
    {
        "name": "陈晨",
        "age": "20",
        "sex": 1,
        "address": "河北邯郸",
        "ug": "A组"
    },
    {
        "name": "付霞",
        "age": "15",
        "sex": 2,
        "address": "甘肃庆阳",
        "ug": "B组"
    }
]

这是用postman测试的，可以看到已经把数据json好了