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 HttpResponse
from django.http import HttpResponseRedirect
from django.urls import reverse
from learn.models import People
def 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：
