Django(part5)--url匹配优先级

学习笔记，仅供参考

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url匹配优先级

首先我们看下面这两段代码，考虑输入地址http://127.0.0.1:8000/birthday/1997/9/28，服务器会返回给我们什么页面：

urls.py

from django.contrib import admin
from django.urls import path
from . import views
from django.urls import re_path
#.表示从当前包里导入

urlpatterns = [
path('admin/', admin.site.urls),
re_path(r'year/(\d{4})/', views.year),
re_path(r'birthday/(\d{4})/', views.page_birth_year),
re_path(r'birthday/(\d{4})/(\d{1,2})/(\d{1,2})/', views.page_birth),

]

views.py

def year(request, y):
print(type(y))
html = "输入年份为:" + y
return HttpResponse(html)

def page_birth(request, year, month, day):
html = "生日为:"+year+"年"+month+"月"+day+"日"
return HttpResponse(html)

def page_birth_year(request, year):
html = "出身年份为:"+year+"年"
return HttpResponse(html)

由于我们的匹配规则是从头(索引为​​0​​​)到尾(索引为​​len(urlpatterns)-1​​​)进行搜索匹配的，所以当我们的url地址匹配到​​birthday/(\d{4})/​​​时，就已经匹配上了，所以就不会再进行匹配了，也就不会匹配到​​birthday/(\d{4})/(\d{1,2})/(\d{1,2})/​​

浏览器响应页面：