自定义Admin后台的登录页面

(1) 在主应用里创建myadmin.py和myapps.py文件，在myadmin.py文件中定义MyAdminSite类，该类继承父类AdminSite并重写admin_view()和get_urls()方法从而更改Admin后台系统地登录地址。

from django.contrib import admin
from functools import update_wrapper
from django.views.generic import RedirectView
from django.urls import reverse
from django.views.decorators.cache import never_cache
from django.views.decorators.csrf import csrf_protect
from django.http import HttpResponseRedirect
from django.urls import include, path, re_path
from django.contrib.contenttypes import views as contenttype_views
from django.contrib.auth.views import redirect_to_login
class MyAdminSite(admin.AdminSite):
    def admin_view(self, view, cacheable=False):
        def inner(request, *args, **kwargs):
            if not self.has_permission(request):
                if request.path == reverse(\'admin:logout\', current_app=self.name):
                    index_path = reverse(\'admin:index\', current_app=self.name)
                    return HttpResponseRedirect(index_path)
                # 修改注销后重新登录的路由地址
                return redirect_to_login(
                    request.get_full_path(),
                    \'/user/login.html\'
                )
            return view(request, *args, **kwargs)
        if not cacheable:
            inner = never_cache(inner)
        if not getattr(view, \'csrf_exempt\', False):
            inner = csrf_protect(inner)
        return update_wrapper(inner, view)

    def get_urls(self):
        def wrap(view, cacheable=False):
            def wrapper(*args, **kwargs):
                return self.admin_view(view, cacheable)(*args, **kwargs)
            wrapper.admin_site = self
            return update_wrapper(wrapper, view)
        urlpatterns = [
            path(\'\', wrap(self.index), name=\'index\'),
            path(\'login/\', RedirectView.as_view(url=\'/user/login.html\')),  # 修改登录页面的路由地址
            path(\'logout/\', wrap(self.logout), name=\'logout\'),
            path(\'password_change/\', wrap(self.password_change, cacheable=True), name=\'password_change\'),
            path(
                \'password_change/done/\',
                wrap(self.password_change_done, cacheable=True),
                name=\'password_change_done\',
            ),
            path(\'jsi18n/\', wrap(self.i18n_javascript, cacheable=True), name=\'jsi18n\'),
            path(
                \'r/<int:content_type_id>/<path:object_id>/\',
                wrap(contenttype_views.shortcut),
                name=\'view_on_site\',
            ),
        ]
        valid_app_labels = []
        for model, model_admin in self._registry.items():
            urlpatterns += [
                path(\'%s/%s/\' % (model._meta.app_label, model._meta.model_name), include(model_admin.urls)),
            ]
            if model._meta.app_label not in valid_app_labels:
                valid_app_labels.append(model._meta.app_label)
        if valid_app_labels:
            regex = r\'^(?P<app_label>\' + \'|\'.join(valid_app_labels) + \')/$\'
            urlpatterns += [
                re_path(regex, wrap(self.app_index), name=\'app_list\'),
            ]
        return urlpatterns

上述代码比较固定，只需根据需求更改注释部分的地址即可。

(2) 将自定义的MyAdminSite类进行系统注册，由MyAdminSite类实例化创建Admin后台系统，在myapps.py中定义系统注册类MyAdminConfig.

from django.contrib.admin.apps import AdminConfig
class MyAdminConfig(AdminConfig):
    default_site = \'myblog.myadmin.MyAdminSite\'

(3) 在settings.py文件的INSTALLED_APPS中配置系统注册类MyAdminConfig。

# 需要将原来的 \'django.contrib.admin\' 注释掉
INSTALLED_APPS = [
    # \'django.contrib.admin\',
    \'myblog.myapps.MyAdminConfig\',
    \'django.contrib.auth\',
    \'django.contrib.contenttypes\',
    \'django.contrib.sessions\',
    \'django.contrib.messages\',
    \'django.contrib.staticfiles\',
]

来源：https://www.cnblogs.com/minqiliang/p/16558963.html
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