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How to understand the url routing system in django, many novices are not very clear about this. In order to help you solve this problem, the following editor will explain it in detail. People with this need can come and learn. I hope you can get something.

For high-quality Web applications, using a concise and elegant URL pattern is a detail worth paying attention to. Django allows you to design your URL freely without being bound by the framework.

In Django, the definition of URLconf includes two parts: regular expression and view. Django uses regular expression to match the requested URL. Once the match is successful, the view of the application is called.

If my project has two applications, app01 and app02, the project structure is as follows:

I need two url groups to map two app applications. First, write two routed app01 app02 packets in the django_tutrital2/urls.py file in the root directory:

From django.contrib import adminfrom django.urls import path, include

Urlpatterns = [path ('admin/', admin.site.urls), path (' app01/', include ('app01.urls')), path (' app02/', include ('app02.urls')),]

Take [path ('app01/', include (' app01.urls'))] as an example, the first app01 is the url content that you enter on the browser, and the app01 in include is the name of the application, pointing to the urls.py file of the app01 application. Django_tutrital2/app01/urls.py content:

From django.urls import path, includefrom app01.views import index, article, test_url

Urlpatterns = [path ('index/', index), path (' article//', article), path ('test_url/', test_url),]

Take [path ('index/', index),] as an example, the first index is the url content that you enter on the browser, and the following index is the name of the corresponding function in views.py, so the url corresponding to the index function is http://127.0.0.1:8000/app01/index/.

The django_tutrital2/app01/views.py content is as follows:

From django.shortcuts import render, HttpResponse# Create your views here.

Def index (request): return HttpResponse ("this is the home page-app01")

Def article (request, aid): return HttpResponse ('this is the {} article' .format (aid))

Def test_url (request): return HttpResponse ('url Test-app01')

The browser enters the corresponding url http://127.0.0.1:8000/app01/index/

The browser enters the corresponding url http://127.0.0.1:8000/app02/index/

Part of url can also be used as a parameter. For example, to see the fifth article, take [path ('article//', article),] as an example, the complete url is

Http://127.0.0.1:8000/app01/article/5/

In general, url is to match the url entered by the user in the browser, and then specify which view function will handle the corresponding network request.

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