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

如果有多個(gè)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(cè)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(xiàng)目--》應(yīng)用

2、應(yīng)用? - view.py

3、view.py

??from django.http import HttpResponse

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

4、應(yīng)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(xiàng)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(xiàng)目配置文件添加應(yīng)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(cè)到admin

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

模型層 （介于視圖層和數(shù)據(jù)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(shù)據(jù)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(nèi)容

#?Django?Admin模塊

#?1.創(chuàng)建python?admin模塊?在終端輸入以下命令
python?manage.py?createsuperuser

#?運(yùn)行?
python?manage,py?runserver

#?把定義好的Artical模型注冊(cè)到admin里面
from?.models?import?Artivcle

admin.site.register(Article)

#?進(jìn)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(jìn)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(shù)據(jù)庫
#?查詢數(shù)據(jù)庫里的models里面的所有的文章
Article.objects.all()

#?個(gè)人建議還是去官網(wǎng)看文檔里面內(nèi)容更豐富，這個(gè)只是簡單的帶你理解django的框架

startproject????????#創(chuàng)建一個(gè)Django項(xiàng)目
startapp????????#創(chuàng)建一個(gè)Django應(yīng)用
check????????#校驗(yàn)項(xiàng)目完整性
runserver????????#本地簡易運(yùn)行Django項(xiàng)目
shell????????#進(jìn)入Django項(xiàng)目的Python?Shell環(huán)境
test????????#執(zhí)行Django用例測試

#數(shù)據(jù)庫相關(guān)
makemigrations????????#創(chuàng)建模型變更的遷移文件
migrate????????#執(zhí)行上一個(gè)命令創(chuàng)建的遷移文件
dumpdata????????#把數(shù)據(jù)庫的數(shù)據(jù)導(dǎo)出到文件
loaddata????????#把文件數(shù)據(jù)導(dǎo)入到數(shù)據(jù)庫

#?創(chuàng)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(duì)模型進(jìn)行遷移，保存到數(shù)據(jù)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(xiàng)目層次的urls的配置
urlpatterns?=?[
????path('admin/',?admin.site.urls),
????path('blog/',?include('blog.urls')),
????]
????
#?把blog應(yīng)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(yùn)行
python?manage.py?runserver