from django.conf import settings from django.contrib import admin, messages from django.contrib.admin.options import IS_POPUP_VAR from django.contrib.admin.utils import unquote from django.contrib.auth import update_session_auth_hash from django.contrib.auth.forms import ( AdminPasswordChangeForm, UserChangeForm, UserCreationForm, ) from django.contrib.auth.models import Group, User from django.core.exceptions import PermissionDenied from django.db import router, transaction from django.http import Http404, HttpResponseRedirect from django.template.response import TemplateResponse from django.urls import path, reverse from django.utils.decorators import method_decorator from django.utils.html import escape from django.utils.translation import gettext, gettext_lazy as _ from django.views.decorators.csrf import csrf_protect from django.views.decorators.debug import sensitive_post_parameters csrf_protect_m = method_decorator(csrf_protect) sensitive_post_parameters_m = method_decorator(sensitive_post_parameters()) @admin.register(Group) class GroupAdmin(admin.ModelAdmin): search_fields = ('name',) ordering = ('name',) filter_horizontal = ('permissions',) def formfield_for_manytomany(self, db_field, request=None, **kwargs): if db_field.name == 'permissions': qs = kwargs.get('queryset', db_field.remote_field.model.objects) # Avoid a major performance hit resolving permission names which # triggers a content_type load: kwargs['queryset'] = qs.select_related('content_type') return super().formfield_for_manytomany(db_field, request=request, **kwargs) @admin.register(User) class UserAdmin(admin.ModelAdmin): add_form_template = 'admin/auth/user/add_form.html' change_user_password_template = None fieldsets = ( (None, {'fields': ('username', 'password')}), (_('Personal info'), {'fields': ('first_name', 'last_name', 'email')}), (_('Permissions'), {'fields': ('is_active', 'is_staff', 'is_superuser', 'groups', 'user_permissions')}), (_('Important dates'), {'fields': ('last_login', 'date_joined')}), ) add_fieldsets = ( (None, { 'classes': ('wide',), 'fields': ('username', 'password1', 'password2'), }), ) form = UserChangeForm add_form = UserCreationForm change_password_form = AdminPasswordChangeForm list_display = ('username', 'email', 'first_name', 'last_name', 'is_staff') list_filter = ('is_staff', 'is_superuser', 'is_active', 'groups') search_fields = ('username', 'first_name', 'last_name', 'email') ordering = ('username',) filter_horizontal = ('groups', 'user_permissions',) def get_fieldsets(self, request, obj=None): if not obj: return self.add_fieldsets return super().get_fieldsets(request, obj) def get_form(self, request, obj=None, **kwargs): """ Use special form during user creation """ defaults = {} if obj is None: defaults['form'] = self.add_form defaults.update(kwargs) return super().get_form(request, obj, **defaults) def get_urls(self): return [ path( '/password/', self.admin_site.admin_view(self.user_change_password), name='auth_user_password_change', ), ] + super().get_urls() def lookup_allowed(self, lookup, value): # Don't allow lookups involving passwords. return not lookup.startswith('password') and super().lookup_allowed(lookup, value) @sensitive_post_parameters_m @csrf_protect_m def add_view(self, request, form_url='', extra_context=None): with transaction.atomic(using=router.db_for_write(self.model)): return self._add_view(request, form_url, extra_context) def _add_view(self, request, form_url='', extra_context=None): # It's an error for a user to have add permission but NOT change # permission for users. If we allowed such users to add users, they # could create superusers, which would mean they would essentially have # the permission to change users. To avoid the problem entirely, we # disallow users from adding users if they don't have change # permission. if not self.has_change_permission(request): if self.has_add_permission(request) and settings.DEBUG: # Raise Http404 in debug mode so that the user gets a helpful # error message. raise Http404( 'Your user does not have the "Change user" permission. In ' 'order to add users, Django requires that your user ' 'account have both the "Add user" and "Change user" ' 'permissions set.') raise PermissionDenied if extra_context is None: extra_context = {} username_field = self.model._meta.get_field(self.model.USERNAME_FIELD) defaults = { 'auto_populated_fields': (), 'username_help_text': username_field.help_text, } extra_context.update(defaults) return super().add_view(request, form_url, extra_context) @sensitive_post_parameters_m def user_change_password(self, request, id, form_url=''): user = self.get_object(request, unquote(id)) if not self.has_change_permission(request, user): raise PermissionDenied if user is None: raise Http404(_('%(name)s object with primary key %(key)r does not exist.') % { 'name': self.model._meta.verbose_name, 'key': escape(id), }) if request.method == 'POST': form = self.change_password_form(user, request.POST) if form.is_valid(): form.save() change_message = self.construct_change_message(request, form, None) self.log_change(request, user, change_message) msg = gettext('Password changed successfully.') messages.success(request, msg) update_session_auth_hash(request, form.user) return HttpResponseRedirect( reverse( '%s:%s_%s_change' % ( self.admin_site.name, user._meta.app_label, user._meta.model_name, ), args=(user.pk,), ) ) else: form = self.change_password_form(user) fieldsets = [(None, {'fields': list(form.base_fields)})] adminForm = admin.helpers.AdminForm(form, fieldsets, {}) context = { 'title': _('Change password: %s') % escape(user.get_username()), 'adminForm': adminForm, 'form_url': form_url, 'form': form, 'is_popup': (IS_POPUP_VAR in request.POST or IS_POPUP_VAR in request.GET), 'add': True, 'change': False, 'has_delete_permission': False, 'has_change_permission': True, 'has_absolute_url': False, 'opts': self.model._meta, 'original': user, 'save_as': False, 'show_save': True, **self.admin_site.each_context(request), } request.current_app = self.admin_site.name return TemplateResponse( request, self.change_user_password_template or 'admin/auth/user/change_password.html', context, ) def response_add(self, request, obj, post_url_continue=None): """ Determine the HttpResponse for the add_view stage. It mostly defers to its superclass implementation but is customized because the User model has a slightly different workflow. """ # We should allow further modification of the user just added i.e. the # 'Save' button should behave like the 'Save and continue editing' # button except in two scenarios: # * The user has pressed the 'Save and add another' button # * We are adding a user in a popup if '_addanother' not in request.POST and IS_POPUP_VAR not in request.POST: request.POST = request.POST.copy() request.POST['_continue'] = 1 return super().response_add(request, obj, post_url_continue)