django 路由控制之反向解析 python中方法

全局urls.py 看app01 url

from django.contrib import admin
from django.urls import path, re_path, include

from app01 import views

urlpatterns = [
    path('admin/', admin.site.urls),
    # path("login.html/", views.login, name="logins"),

    # 分发
    re_path(r"^app01/", include("app01.urls")),


]

给url 起个name

app01的 urls.py

from django.contrib import admin
from django.urls import path, re_path

from app01 import views

urlpatterns = [

    re_path(r'^articles/2003/$', views.special_case_2003, name="s_c_2003"),  # special_case_2003(request)
    # re_path(r'^articles/([0-9]{4})/$', views.year_archive),  # year_archive(request, 2009)
    # re_path(r'^articles/([0-9]{4})/([0-9]{2})/$', views.month_archive),  # month_archive(request, 2009, 12)

    # month_archive(request, year=2009, month=12)
    # re_path(r'^articles/(?P<year>[0-9]{4})/(?P<mouth>[0-9]{2})/$', views.month_archive),
    # re_path(r'^articles/([0-9]{4})/([0-9]{2})/([0-9]+)/$', views.article_detail),


]

views.py 视图函数 导入模块 函数

from django.urls import reverse

reverse（"别名"）  加上别名就行 就可以反向解析url

打印url

from django.urls import reverse


def special_case_2003(request):

    url = reverse("s_c_2003")
    print(url)

    return HttpResponse("special_case_2003")

访问一下

可以看到反向解析出来的url

 

 2.换另外一个url的别名访问

app01的 urls.py

from django.contrib import admin
from django.urls import path, re_path

from app01 import views

urlpatterns = [

    re_path(r'^articles/2003/$', views.special_case_2003, name="s_c_2003"),  # special_case_2003(request)
    re_path(r'^articles/([0-9]{4})/$', views.year_archive, name="y_a"),  # year_archive(request, 2009)
    # re_path(r'^articles/([0-9]{4})/([0-9]{2})/$', views.month_archive),  # month_archive(request, 2009, 12)

    # month_archive(request, year=2009, month=12)
    # re_path(r'^articles/(?P<year>[0-9]{4})/(?P<mouth>[0-9]{2})/$', views.month_archive),
    # re_path(r'^articles/([0-9]{4})/([0-9]{2})/([0-9]+)/$', views.article_detail),


]

app01 views.py 视图函数

from django.shortcuts import render, HttpResponse

# Create your views here.

from django.urls import reverse


def special_case_2003(request):

    url = reverse("s_c_2003")
    url = reverse("y_a")  # app01/articles/([0-9]{4})/                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
    print(url)

    return HttpResponse("special_case_2003")

访问页面报错

 

url 解析不了正则表达式，url加上了正则表达式 需要在reverse()函数另外加参数， 用参数数字替换正则表达式 

加上同样格式数字 例如是4位数的 就写4位数字

用参数替换正则表达式 从而拿到一个固定url

from django.shortcuts import render, HttpResponse

# Create your views here.

from django.urls import reverse


def special_case_2003(request):

    url = reverse("s_c_2003")
    url = reverse("y_a", args=(4009,))  # app01/articles/([0-9]{4})/
    print(url)

    return HttpResponse("special_case_2003")

加上参数后可以访问