第一步：创建项目
打开命令行界面，输入以下命令：
django-admin startproject (项目名称)
第二步：创建应用
进入项目根目录，确保与manage.py文件处于同一级，输入下述命令：
python manage.py startapp (应用名称)
第三步：创建数据库
使用Navicat创建数据库（此处不做强行要求，能实现创建数据库即可）
第四步：配置数据库链接
在与项目同名的文件夹下，找到并打开settings.py文件
修改配置如下：
DATABASES = {'default': {'ENGINE': 'django.db.backends.mysql', # 数据库引擎'NAME': 'mysite', # 数据库名，先前创建的'USER': 'root', # 用户名，可以自己创建用户'PASSWORD': '', # 密码'HOST': '127.0.0.1', # mysql服务所在的主机ip'PORT': '3306' # mysql服务端口}
}在INSTALLED_APPS中添加你的应用
INSTALLED_APPS = ['django.contrib.admin','django.contrib.auth','django.contrib.contenttypes','django.contrib.sessions','django.contrib.messages','django.contrib.staticfiles','你的应用名称'
]注释掉csrf中间件
MIDDLEWARE = ['django.middleware.security.SecurityMiddleware','django.contrib.sessions.middleware.SessionMiddleware','django.middleware.common.CommonMiddleware',# 'django.middleware.csrf.CsrfViewMiddleware','django.contrib.auth.middleware.AuthenticationMiddleware','django.contrib.messages.middleware.MessageMiddleware','django.middleware.clickjacking.XFrameOptionsMiddleware',
]第五步：配置路由
在与项目同名的文件夹下，找到并打开urls.py文件
修改配置如下：
from django.urls import path,includeurlpatterns = [# path('admin/', admin.site.urls),path('api/', include('你的应用的名字.urls'))
]第六步：创建数据库表
在应用文件夹下，找到并打开models.py
定义class类，每个类对应一张数据库表
class Devices(models.Model):dev_code = models.CharField(max_length=24)dev_name = models.CharField(max_length=50)address = models.CharField(max_length=100)status = models.BooleanField()class Records(models.Model):dev = models.ForeignKey(to=Devices,on_delete=models.CASCADE)duration = models.IntegerField(default=0)amount = models.DecimalField(max_digits=10, decimal_places=2)create_time = models.DateTimeField(auto_created=True)运行（数据迁移，创建表）
1）python manage.py makemigrations
2）python manage.py migrate
第七步：编写数据接口
在应用文件夹下，找到并打开views.py
定义class类，每个类就是一个接口，有get（查询）、post（添加）、put（修改）、delete（删除）
from django.http import JsonResponse
from django.views import View
from api.models import *
from datetime import datetime
import math
import json# Create your views here.class DevicesApi(View):def get(self, request):pagesize = 5result = Devices.objects.filter()params = request.GETkeyword = params.get('key', '')page = params.get('page', '')sort = params.get('sort', '0')if(keyword != ''):result = result.filter(community_name__contains=keyword)if(sort == '1'):result = result.order_by('-id')elif(sort == '2'):result = result.order_by('id')records = result.count()print(page+'a')if(page != ''):page = int(page)start = (page - 1) * pagesizeend = page * pagesizeresult = result[start:end]total = math.ceil(records / pagesize)data = []for item in result:data.append({'id': item.id,'dev_code': item.dev_code,'community_name': item.community_name,'dev_address': item.dev_address,'dev_status': item.dev_status})return JsonResponse({'code': 200, 'data':data, 'total': total, 'page': page})def post(self,request):data = json.loads(request.body)# print(data)obj = Devices()obj.dev_code = data['dev_code']obj.community_name = data['community_name']obj.dev_address = data['dev_address']obj.dev_status = 0obj.save()return JsonResponse({'code': 200})class DevicesDel(View):def post(self, request):data = json.loads(request.body)# print(data)Devices.objects.filter(id__in=data).delete()return JsonResponse({'code': 200})class DevicesEdit(View):def get(self, request):devID = int(request.GET.get('id',0))if(devID>0):obj = Devices.objects.get(id=devID)if(obj.dev_status):obj.dev_status = 0else:obj.dev_status = 1obj.save()return JsonResponse({'code': 200})class DevicesInfo(View):def get(self, request):devID = int(request.GET.get('id', 0))result = {}if(devID > 0):obj = Devices.objects.get(id=devID)# print(obj)result = {'id': obj.id, 'dev_code': obj.dev_code, 'community_name': obj.community_name, 'dev_address': obj.dev_address, 'dev_status': obj.dev_status}return JsonResponse({'code': 200, 'data': result})class RecordApi(View):def post(self, request):data = json.loads(request.body)obj = Records()obj.dev_id_id = data['dev_id']obj.use_times = data['use_times']obj.amount = data['amount']obj.create_time = datetime.now()obj.save()return JsonResponse({'code': 200})def get(self, request):pagesize = 5result = Records.objects.filter().order_by('-id')params = request.GETpage = params.get('page', '')records = result.count()if (page != ''):page = int(page)start = (page - 1) * pagesizeend = page * pagesizeresult = result[start:end]total = math.ceil(records / pagesize)data = []for item in result:data.append({'id': item.id,'dev_code': item.dev_id.dev_code,'community_name': item.dev_id.community_name,'dev_address': item.dev_id.dev_address,'dev_status': item.dev_id.dev_status,'use_times': item.use_times,'amount': item.amount,'dev_id': item.dev_id_id})return JsonResponse({'code': 200, 'data': data, 'total': total, 'page': page})
)
