Unit 4 Routing Layer

Static and dynamic routing

Static Routing

Concept:Static routing is used to map the corresponding view function, where urlpatterns is a global variable in the routing file, which is used to store the mapping relationship between routing and view functionseffect:Routes used for fixed addresses, and routes used in general operations are static routes

Dynamic Routing

Function:More complex, when the routing settings are changing, dynamic routing is used.

path dynamic routing

 path('index2//', views.IndexView2.as_view()),class IndexView2(View):def get(self, request, id):return HttpResponse(f"The matched id is {id}")

re.path dynamic routing
PS: use regular expressions to write

 re_path(r'^(?P\d+)/(?P[a-zA-Z]+)/$',views.IndexView3.as_view())class IndexView3(View):def get(self, request, x, y):return HttpResponse(f"x is {x}, y is {y}")

Access the connection: **http://127.0.0.1:8000/abc/123/** to get the x and y values

Route Distribution

Concept: The general route is written directly to the url of the main project.When creating multiple custom applications in the main project, you need to use route distribution include to distribute routes to each application.

Using:

from myapp import urlsurlpatterns = [path('', include(urls))]

PS:
You need to create a urls.py file in each application to store the url address in it.

Advantages of routing distribution

1. There are many benefits that route distribution brings us, which allows us to manage each route more conveniently and effectively in multiple app projects
2. It allows our users to see the browsing when visitingThe URL address in the server is more pleasing to the eye