项目默认使用sqlite
DATABASES = { ‘default‘: { ‘ENGINE‘: ‘django.db.backends.sqlite3‘, ‘NAME‘: os.path.join(BASE_DIR, ‘db.sqlite3‘), } }
并且在根目录中生成数据库文件
db.sqlite3
1.创建应用:官方规定,如果要使用模型,必须先创建一个app
python manage.py startapp ts
记得创建后去settings文件中查看应用是否添加进去,没有则自己添加,否则该应用中数据表创建失败
INSTALLED_APPS = ( ‘django.contrib.admin‘, ‘django.contrib.auth‘, ‘django.contrib.contenttypes‘, ‘django.contrib.sessions‘, ‘django.contrib.messages‘, ‘django.contrib.staticfiles‘, ‘ts‘ )
2.在ts目录中
migrations#目录
__init__.py
__init__.py
admin.py
models.py
tests.py
views.py
找到models文件,在这里面创建表
from django.db import models # Create your models here. class User(models.Model): name=models.CharField(max_length=64)
3.命令生成数据表:
python manage.py makemigrations
会自动知道我们的模型中的改变,并且开始创建数据库(对于多个应用,会排除已经创建过的,对于新的,会执行这个操作)
Migrations for ‘ts‘: 0001_initial.py: - Create model User
开始创建数据表:
python manage.py migrate
Operations to perform:
Synchronize unmigrated apps: staticfiles, messages
Apply all migrations: sessions, admin, ts, auth, blog, contenttypes
Synchronizing apps without migrations:
Creating tables...
Running deferred SQL...
Installing custom SQL...
Running migrations:
Rendering model states... DONE
Applying ts.0001_initial... OK
创建成功
4.开始使用数据库
from ts import models # Create your views here. def show_db(request): models.User.objects.create( name="test" ) ret=models.User.objects.all() for item in ret: print(item.name) return HttpResponse("<h1>test over</h1>")
记得在urls文件中修改路由
from ts import views as v2
urlpatterns = [ url(r‘^test‘,v2.show_db) ]