Django 创建新App及其常用命令

创建新的项目

 startproject my_project

创建新的App

# 在Django项目(my_project)的根目录下执行
python3  startapp my_app

启动Django中的开发服务器

# make new migrations
python3  makemigrations

# apply all migrations
python3  migrate

# run server
python3  runserver

创建models

class App1():

    title = (max_length=100)

    category = (max_length=50, blank=True)

    date_time = (auto_now_add=True)

    def __unicode__(self):

        return 

    class Meta:

        ordering = ['-date_time']

进入Django中的交互式shell

python3  shell

from  import App1

# create(增加操作)
(title='title',category='category1')

# all和get(查看操作)
()
(id=1)

# update(修改操作)
demo = (id=1)

='title2'

# delete(删除操作)
()

创建一个超级用户

python3  createsuperuser

# 输入http://127.0.0.1:8000/admin登录后台

数据库信息的增加和删除，中增加代码

from  import App1

(App1)

Views和URL操作

# 
from  import HttpResponse
def home(request):
    return HttpResponse("Hello World, Django")

# 
url(r'^$', '')

URL传参

# 
def detail(request, number):
    return HttpResponse("The number is %s." % number)

# 
url(r'^([0-9]+)/', '', name='detail')

URL传参查询数据库

# 
def database(request, args):
    post = ()[int(args)]
    str = ("title = %s, category = %s, date_time = %s" % (, , post.date_time))
    return HttpResponse(str)

# 
url(r'^id/([0-9])+/', '', name='database'),

将代码上传到Github

# 在github中新建仓库django-blog
# 在项目根目录下执行
git init
git remote add Django
git@:ybbz/
git add .
git status
git commit -m "django blog init"
git pull Django master && git push Django master

Error: That port is already in use.

ps aux | grep -i manage
kill -9 ****
python3  runserver