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這個%并不是運算符，%s這是占位符，表示這個有要表示為字符串的內容先占著位置，后面接%(變量名)，運行時占位符這里就被替換成該變量的值

如果有多個占位符就，后面的%(變量1，變量2，變量3)，按順序依次替換

python manage.py createsuperuser

python manage.py. runserver

#注冊到admin

from .models import ?article
admin.site.register(article)

python manage.py shell

python manage.py makemigrations

python manage.py migrate

python manage.py migrate

open in terminal

django-admin?startproject

1、項目--》應用

2、應用? - view.py

3、view.py

??from django.http import HttpResponse

# Create your views here. 實現hello word
def hello_word(request):
? ?return HttpResponse("hello, word!")

4、應用路由? 新建urls.py

from django.urls import path,include
import ?bolg.views
urlpatterns=[path('hello_word',bolg.views.hello_word)]

5、項目路由 urls.py
from django.contrib import admin
from django.urls import path, include

urlpatterns = [
? ?path('admin/', admin.site.urls),
? ?path('bolg/',include('bolg.urls'))
]

6、修改項目配置文件添加應用

INSTALLED_APPS = [
? ?'django.contrib.admin',
? ?'django.contrib.auth',
? ?'django.contrib.contenttypes',
? ?'django.contrib.sessions',
? ?'django.contrib.messages',
? ?'django.contrib.staticfiles',
? ?'first_django.apps.FirstDjangoConfig',
? ?#myapp
? ?'bolg.apps.BolgConfig' // 初始化文件

7、runserver?
http://127.0.0.1:8000/bolg/hello_word

Django Shell?

python?manage.py?shell

Django Admin

python?manage.py?createsuperuser

model注冊到admin

from?.models?import?Article
admin.site.register(Article)

模型層 （介于視圖層和數據庫間）

class?Article(models.Model):
????id=?models.AutoField(?primary_key=True)
????title=?models.TextField()
????date=models.DateTimeField(auto_now=True)

遷移到數據庫 （同步）Migration

python?manage.py?makemigrations
python?manage.py?migrate

View.py

from?django.http?import?HttpResponse

def?hello_world(request):
????return?HttpResponse("hello?world")

urls.py

from?django.urls?import?path,?include
import?blog.views

urlpatterns?=?[
????path('admin',admin.site.urls),
????path('blog/',include('blogs.urls')
]

Setting.py 配置app.py的內容

#?Django?Admin模塊

#?1.創建python?admin模塊?在終端輸入以下命令
python?manage.py?createsuperuser

#?運行?
python?manage,py?runserver

#?把定義好的Artical模型注冊到admin里面
from?.models?import?Artivcle

admin.site.register(Article)

#?進入models
def?__str__(self):
????return?self.title

#?django?shell交njiangyi互式的python編程
#?在終端Terminal輸入
pyhton?manage.py?shell?

#?引進文章模型
from?blog.models?import?*
a?=?Artical()
a.title?=?'test?django?test'
a.brief_content?=?'test?django?shell,?by?dongdongqiang?teacher.'
a.content?=?'test?djano?shell,?new?article,?main?content.'

print(a)
a.save()??#?保存到數據庫
#?查詢數據庫里的models里面的所有的文章
Article.objects.all()

#?個人建議還是去官網看文檔里面內容更豐富，這個只是簡單的帶你理解django的框架

startproject????????#創建一個Django項目
startapp????????#創建一個Django應用
check????????#校驗項目完整性
runserver????????#本地簡易運行Django項目
shell????????#進入Django項目的Python?Shell環境
test????????#執行Django用例測試

#數據庫相關
makemigrations????????#創建模型變更的遷移文件
migrate????????#執行上一個命令創建的遷移文件
dumpdata????????#把數據庫的數據導出到文件
loaddata????????#把文件數據導入到數據庫

#?創建blog模型層模型
from?django.db?import?models

class?Artical(models.Models):
????artical_id?=?models.AotuField(primary_key?=?True)
????title?=?models.TextField()
????brief_content?=?models.TextField()
????content?=?models.TextField()
????publish_date?=?models.DateTimeField(auto_now=True)
?
?
#?對模型進行遷移，保存到數據庫里面,?在終端輸入命令
python?manage.py?makemigrations

python?manage.py?migrate

#?views

from?django.http?import?HttpResponse
def?hello_world(request):
????return?HttpResponse('hello?world')
????
#?在用層次配置路由，urls.py?
from?django.urls?import?path,?include

urlpattern?=?[
????path('hello_world',?blog.views.hello_world),
????]
????
#?項目層次的urls的配置
urlpatterns?=?[
????path('admin/',?admin.site.urls),
????path('blog/',?include('blog.urls')),
????]
????
#?把blog應用添加到配置settings文件里面
INSTALL_APPS?=?[
??
????????'blog.apps.AppConfig',
????????]
???
???
#?在終端Terminal輸入命令運行
python?manage.py?runserver