Django--redirect redirect

In Django, redirect is a function used to redirect. It allows you to redirect users from one URL to another. It is usually used to handle page jumps after form submission, user login, user registration, etc. The redirect function belongs to the django.shortcuts module.

The following is the basic usage of the redirect function and an explanation of some parameters:

from django.shortcuts import redirect

def my_view(request):
    # 一些处理逻辑...

    # 使用 redirect 进行重定向
    return redirect('target_url_name')

target_url_name: This is the name of the target URL you want to redirect, usually defined in the urls.py file. This can also be a specific URL string.
If there is the following definition in urls.py:

from django.urls import path
from .views import my_view

urlpatterns = [
    path('target/', my_view, name='target_url_name'),
    # 其他 URL 配置...
]

You can then use the redirect function in the view to redirect the user to this URL:

from django.shortcuts import redirect

def my_view(request):
    # 一些处理逻辑...

    # 使用 redirect 进行重定向
    return redirect('target_url_name')

You can also specify a URL string directly:

return redirect('/target/')

Or use an absolute path:

return redirect('https://example.com/')

permanent: This is an optional parameter. If set to True, it means to perform a permanent redirection (HTTP status code 301), otherwise it is a temporary redirection (HTTP status code 302). The default is a temporary redirect.

return redirect('target_url_name', permanent=True)

*args, **kwargs: In addition to the above parameters, redirect also accepts any number of positional parameters *args and keyword parameters **kwargs, which will be passed to the reverse() function for building the target URL.

return redirect('target_url_name', arg1, arg2, kwarg='value')

Overall, the redirect function is a very convenient tool for page redirection in Django views. You can easily direct users to different pages by providing the name of the target URL or a direct URL string.

In Django, the reverse function is used to generate a URL, which returns the corresponding URL string based on the given view name and parameters. The purpose of using reverse in the redirect function is to convert the view name into an actual URL for redirection.

Why you need to use reverse:

Dynamically generate URLs: In Django, URL configuration is flexible and can be changed as needed. In a redirect, you usually need to provide the name of the view rather than a hard-coded URL string. reverse allows you to generate the actual URL from the view name and parameters.

Avoid hardcoding: Hardcoding the URL directly in the redirect can cause problems, especially in large applications. By using reverse, you can avoid writing the same URL in multiple places and ensure URL consistency. If you later change the view's URLs, you can simply update the configuration in urls.py instead of having to find and modify all the URLs that are hardcoded directly in the code.
reverse('user_edit', kwargs={'user_id': user_id}) is used to generate the URL associated with the user_edit view, where user_id is passed as a keyword argument. The redirect function then redirects the user to this generated URL.

from django.shortcuts import redirect, reverse

def my_view(request, user_id):
    # 一些处理逻辑...
    
    # 使用 reverse 生成目标 URL，并通过 redirect 进行重定向
    return redirect(reverse('user_edit', kwargs={'user_id': user_id}))

Such a structure helps you keep your code maintainable and flexible, because URL management is centralized in the urls.py file rather than scattered throughout the code base.

The following two lines of code are equivalent:

return redirect(reverse('user_edit', kwargs={'user_id': user_id}))
return redirect(f'/user_edit/{user_id}')

Because they all achieve the same goal, which is to redirect the user to the specified user_edit view, which contains the user_id parameter.

reverse function:

reverse('user_edit', kwargs={'user_id': user_id})Used to generate the URL associated with the user_edit view.
The redirect function redirects the user to the generated URL.
Hardcoded URL string:

redirect(f'/user_edit/{user_id}')Construct the URL string '/user_edit/{user_id}' directly, where {user_id} will be replaced with the actual user ID.
The redirect function redirects the user to the constructed URL.
In both cases, the end effect is the same: the user will be redirected to the user_edit view with the correct user ID. Choosing to use one of these approaches often comes down to personal preference and coding style.

Django--redirect redirect

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