自学教程：Django开发RESTful API实现增删改查(入门级)

django-admin.py startproject myDjango<project_name>

myDjango/├── manage.py  # 管理文件└── myDjango # 项目目录    ├── __ init __.py    ├── settings.py  # 配置文件    ├── urls.py  # 路由 --> URL和函数的对应关系    └── wsgi.py  # runserver命令就使用wsgiref模块做简单的web server

INSTALLED_APPS = [   ...   'rest_framework']

DATABASES = {    'default': {        'ENGINE': 'django.db.backends.mysql',        'NAME': 'bigdatatest',        'USER': 'root',        'HOST': '127.0.0.1',        'PASSWORD': '1009',        'PORT': 3306,        'OPTIONS': {'charset': 'utf8mb4'},    }}

import pymysqlpymysql.version_info = (1, 4, 13, "final", 0)pymysql.install_as_MySQLdb()

python manage.py startapp users<app_name>

users/├── migrations  # 用于在之后定义引用迁移功能   ├── __ init __.py├── __ init __.py├── admin.py  # 管理站点模型的声明文件，默认为空├── apps.py  # 应用信息定义文件。在其中生成了类Appconfig，类用于定义应用名等Meta数据├── models.py  # 添加模型层数据类的文件├── tests.py  # 测试代码文件└── views.py  # 定义URL响应函数

INSTALLED_APPS = [    ...    'users']

python manage.py inspectdb

from django.db import modelsclass User(models.Model):    id = models.IntegerField(primary_key=True)    name = models.CharField(max_length=255, blank=True, null=True)    age = models.IntegerField(blank=True, null=True)    class Meta:        managed = False        db_table = 'user'

from rest_framework import serializersfrom users.models import Userclass UserSerializer(serializers.ModelSerializer):    class Meta:        model = User        fields = "__all__"

from __future__ import unicode_literalsfrom rest_framework.decorators import api_viewfrom rest_framework.response import Responsefrom user.models import Userfrom user.serializers import UserSerializer@api_view(['GET'])def getlist(request):  # 获取全部数据    if request.method == 'GET':        users = User.objects.values('id', 'name', 'age').distinct()        serializer = UserSerializer(users, many=True)        return Response(serializer.data)@api_view(['GET'])def getlistpic(request):  # 根据id查找单条数据    id = request.GET['id']    if id is not None:        users = User.objects.filter(id=id)        serializer = UserSerializer(users, many=True)        return Response(serializer.data)    else:        return Response(str('请传id'))@api_view(['POST'])def addUser(request):  # 添加数据    ser = UserSerializer(data=request.data)    if ser.is_valid():       ser.save()       return Response(ser.data)    return Response(ser.errors)@api_view(['GET'])def deleteUser(request):  # 根据id添加删除    id = request.GET['id']    if id is not None:        if User.objects.filter(id=id):            User.objects.get(id=id).delete()            return Response(str('success'))        else:            return Response(str('没有此id'))    else:        return Response(str('请传id'))@api_view(['POST'])def updateUser(request):  # 根据id修改数据    if User.objects.filter(id=request.data['id']):        user = User.objects.get(id=request.data['id'])        ser = UserSerializer(instance=user, data=request.data)  # 注意指定参数        if ser.is_valid():            ser.save()            return Response(str('success'))        return Response(ser.errors)    return Response(str('没有此id'))

from django.conf.urls import urlfrom users import views as users_viewsurlpatterns = [    url(r'^getlistpic', users_views.getlistpic, name='home'),    url(r'^getlist', users_views.getlist, name='home'),    url(r'^addUser', users_views.addUser, name='home'),    url(r'^deleteUser', users_views.deleteUser, name='home'),    url(r'^updateUser', users_views.updateUser, name='home')]

python manage.py runserver 127.0.0.1:8000