1.将应用（如learn）添加到安装应用配置中

将我们新建的应用（learn）添加到 settings.py 中的 INSTALLED_APPS中，告诉Django有这么一个应用。

INSTALLED_APPS = [    'django.contrib.admin',    'django.contrib.auth',    'django.contrib.contenttypes',    'django.contrib.sessions',    'django.contrib.messages',    'django.contrib.staticfiles',    'learn',]

2. 在应用下的model添加表learn/model.py：

from django.db import models# Create your models here.class People(models.Model):    name = models.CharField(max_length=30)    age = models.IntegerField()

3.生成表：

python manage.py migrate

4. 在learn/view.py中添加操作：

from django.shortcuts import render# Create your views here.from django.http import HttpResponsefrom django.http import HttpResponseRedirectfrom django.urls import reversefrom learn.models import Peopledef index(request):    # People.objects.create(name='michaelshu', age=12)    # People.objects.get_or_create(name="WZT", age=23)    p = People(name='WZ', age=23)    p.save()    #p =  People.objects.all()    #return HttpResponse(p[0].age)    # 方法 3    #p1 = People()    #p1.name = "WeizhongTu1"    #p1.age = 23    #p1.save()    #return HttpResponse(p1.id)        # get operation    # p = People.objects.get(name='WT')    # return HttpResponse(p.age)

5. 查看数据库表是否添加成功：