sites.py 文件源码

def login(self, request, extra_context=None):
        """
        Displays the login form for the given HttpRequest.
        """
        if request.method == 'GET' and self.has_permission(request):
            # Already logged-in, redirect to admin index
            index_path = reverse('admin:index', current_app=self.name)
            return HttpResponseRedirect(index_path)

        from django.contrib.auth.views import login
        # Since this module gets imported in the application's root package,
        # it cannot import models from other applications at the module level,
        # and django.contrib.admin.forms eventually imports User.
        from django.contrib.admin.forms import AdminAuthenticationForm
        context = dict(self.each_context(request),
            title=_('Log in'),
            app_path=request.get_full_path(),
        )
        if (REDIRECT_FIELD_NAME not in request.GET and
                REDIRECT_FIELD_NAME not in request.POST):
            context[REDIRECT_FIELD_NAME] = request.get_full_path()
        context.update(extra_context or {})

        defaults = {
            'extra_context': context,
            'current_app': self.name,
            'authentication_form': self.login_form or AdminAuthenticationForm,
            'template_name': self.login_template or 'admin/login.html',
        }
        return login(request, **defaults)