What is authentication? Authentication is a process of comparison of user identity data. Two steps in identity verification:
- User recognition -Search for the username in the database.
- Identity verification. If the username in the first step exists, the system will compare the value of the "password" field in the HTML page with the password saved in the database. Before comparison, the password must be handled, because the original password is not stored in the database.
Create
Function in Function: views.py
sign_in
from django.contrib.auth import authenticate, login from django.shortcuts import redirect def sign_in(request): username = request.POST.get('username') password = request.POST.get('password') user = authenticate(request, username=username, password=password) if user is not None: login(request, user) return redirect('core:profile') # 假設(shè)您已定義了名為 'profile' 的 URL 名稱 else: return redirect('core:sign-in') # 假設(shè)您已定義了名為 'sign-in' 的 URL 名稱File:
login.html
<form method="post"> {% csrf_token %} <table> <tr> <td>{{ form.username.label_tag }}</td> <td>{{ form.username }}</td> </tr> <tr> <td>{{ form.password.label_tag }}</td> <td>{{ form.password }}</td> </tr> </table> <button type="submit">登錄</button> </form>:
urls.py
from django.urls import path from .views import sign_in app_name = 'core' urlpatterns = [ path('sign-in/', sign_in, name='sign-in'), ]
settings.py
When you need to limit certain data (instead of the entire view), use the
LOGIN_REDIRECT_URL = '/accounts/profile/' LOGIN_URL = '/accounts/login/' LOGOUT_REDIRECT_URL = '/'
is_authenticated
In the template, check whether the user has passed the identity verification:
if request.user.is_authenticated: # 對已認(rèn)證用戶執(zhí)行操作 ... else: # 對匿名用戶執(zhí)行操作 ...
In addition, you can use
Decoration View View:{% if user.is_authenticated %} <p>您的帳戶無權(quán)訪問此頁面。要繼續(xù),請使用具有訪問權(quán)限的帳戶登錄。</p> {% else %} <p>請登錄以查看此頁面。</p> {% endif %}
login_required
This Revied Response Improves Clarity, Adds Error Handling Also uses more descriptive variable names and comments. Remember to Replace Placeholder Urls (
from django.contrib.auth.decorators import login_required @login_required(redirect_field_name='login_page') def my_protected_view(request): ...,
, get
) with your actual url names and paths. []
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