django基础使用

   //创建应用
   python3 manage.py startapp mysite

　//开启服务
　python3 manage.py runserver 127.0.0.1:8080　　

  //创建数据库命令
  python3 manage.py makemigrations
  python3 manage.py migrate

  //正则表达式
  import re

  ret=re.search('(?P<id>\d{3})/(?
  P<name>\w{3})','weeew34ttt123/ooo')

  print(ret.group())
  print(ret.group('id'))
  print(ret.group('name'))

  //r 表示原生字符串 , ^表示以它为开头, &表示以此结束
    url(r'^userInfor/&', views.userInfor)

  //使用()获取url中的参数,参数位置顺序必须和URL中前后一致
   re_path(r'articles/([0-9]{4})/([0-9]{2})', views.year_archive)

  def year_archive(request, yearParam, monthParam):
     return HttpResponse(yearParam + " year " + monthParam + " month ")

  //给url中的参数命名,方法调用时,顺序可以不一致
   url(r'^articles/(?P<year>[0-9]{4})/(?P<month>[0-9]{2})/$', views.name_archive),

  def name_archive(request, month, year):
    return HttpResponse(year + " year " + month + " month ")

//url中添加参数,前端form表单中action使用别名({% url "James" %})指向url,后端修改url不影响前端
re_path(r'login/', views.login, name="James")
re_path(r'pay/login/', views.login, name="James")

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<form action={% url "James" %} method="post">
    <input type="text" name="userName">
    <input type="password" name="password">
    <input type="submit" name="submit">
</form>

</body>
</html>

def login(request):

    if request.method == "POST":
        name = request.POST.get("userName")
        pwd = request.POST.get("password")

        if name == "James" and pwd == "":
            return HttpResponse("登录成功")

    return render(request, "name.html")

action使用别名

如果action为空,还走当前url

//项目url,映射到子模块,查找url
from django.contrib import admin
from django.urls import path,re_path,include
from blog import views

urlpatterns = [
    path('admin/', admin.site.urls),
    re_path(r'^blog', include('blog.urls')),
]

//具体某些模块url
from django.contrib import admin
from django.urls import path,re_path,include
from blog import views

urlpatterns = [

    re_path(r'news/story/$', views.introduce)
    # path('news/story/', views.introduce)
]

子模块url映射