fix: Misc

Update to Django 3.2

See merge request klub-dev-ens/WikiENS!18

.credentials/SECRET_KEY

@@ -0,0 +1 @@
+insecure-secret_key

.envrc

@@ -0,0 +1 @@
+use nix

.gitignore

@@ -3,3 +3,4 @@ venv
 .*.swp
 *.pyc
 *.sqlite3
+.direnv

WikiENS/.gitignore

@@ -1 +0,0 @@
-settings.py

WikiENS/settings/.gitignore

@@ -1 +0,0 @@
-secret.py

WikiENS/settings/local.py

@@ -1,16 +0,0 @@
-import os
-
-
-from .common import *  # noqa
-from .common import BASE_DIR
-
-
-EMAIL_BACKEND = "django.core.mail.backends.console.EmailBackend"
-DEBUG = True
-
-DATABASES = {
-    "default": {
-        "ENGINE": "django.db.backends.sqlite3",
-        "NAME": os.path.join(BASE_DIR, "db.sqlite3"),
-    }
-}

WikiENS/settings/prod.py

@@ -1,11 +0,0 @@
-import os
-
-from .common import *  # noqa
-from .common import BASE_DIR
-
-
-DEBUG = False
-ALLOWED_HOSTS = ["www.eleves.ens.fr", "wiki.eleves.ens.fr"]
-
-STATIC_ROOT = os.path.join(BASE_DIR, "..", "static")
-MEDIA_ROOT = os.path.join(BASE_DIR, "..", "media")

WikiENS/settings/secret_example.py

@@ -1,7 +0,0 @@
-SECRET_KEY = "_u5q4-^1qgkqg=i5o5ha*xkd@82#l$e+%m)$v+4y#t-5!g-%g2"
-ADMINS = None
-EMAIL_HOST = "localhost"
-
-DBNAME = "wiki"
-DBUSER = "wiki"
-DBPASSWD = "dummy"

WikiENS/urls.py

@@ -1,23 +0,0 @@
-from django.conf.urls import url, include
-from django.contrib import admin
-
-from allauth_ens.views import capture_login, capture_logout
-from wiki.urls import get_pattern as get_wiki_pattern
-from django_nyt.urls import get_pattern as get_nyt_pattern
-
-allauth_urls = [
-    # Catch login/logout views of admin site.
-    url(r'^_admin/login/$', capture_login),
-    url(r'^_admin/logout/$', capture_logout),
-    # Allauth urls.
-    url(r'^_profil/', include('allauth.urls')),
-]
-
-urlpatterns = allauth_urls + [
-    url(r'^_admin/', admin.site.urls),
-    url(r'^notifications/', get_nyt_pattern()),
-    url(r'^_groups/', include("wiki_groups.urls")),
-    url(r'', get_wiki_pattern()),
-]
-
-# TODO add MEDIA_ROOT

app/settings.py

@@ -1,42 +1,34 @@
-import os
+"""
+Django settings for the wiki_ens project
+"""
 
-from django.urls import reverse_lazy
+from pathlib import Path
 
 from django.contrib.messages import constants as messages
+from django.urls import reverse_lazy
+from django.utils.translation import gettext_lazy as _
+from loadcredential import Credentials
 
-try:
-    from . import secret
-except ImportError:
-    raise ImportError(
-        "The secret.py file is missing.\n"
-        "For a development environment, simply copy secret_example.py"
-    )
+credentials = Credentials(env_prefix="WIKIENS_")
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+# WARNING: keep the secret key used in production secret!
+SECRET_KEY = credentials["SECRET_KEY"]
+
+# WARNING: don't run with debug turned on in production!
+DEBUG = credentials.get_json("DEBUG", False)
+
+ALLOWED_HOSTS = credentials.get_json("ALLOWED_HOSTS", [])
+
+ADMINS = credentials.get_json("ADMINS", [])
+
+SITE_ID = 1
 
 
-def import_secret(name):
-    """
-    Shorthand for importing a value from the secret module and raising an
-    informative exception if a secret is missing.
-    """
-    try:
-        return getattr(secret, name)
-    except AttributeError:
-        raise RuntimeError("Secret missing: {}".format(name))
-
-
-SECRET_KEY = import_secret("SECRET_KEY")
-ADMINS = import_secret("ADMINS")
-MANAGERS = ADMINS
-EMAIL_HOST = import_secret("EMAIL_HOST")
-
-DBNAME = import_secret("DBNAME")
-DBUSER = import_secret("DBUSER")
-DBPASSWD = import_secret("DBPASSWD")
-
-SERVER_EMAIL = "wiki@www.eleves.ens.fr"
-
-BASE_DIR = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
-
+###
+# List the installed applications
 
 INSTALLED_APPS = [
     "django.contrib.admin",
@@ -66,6 +58,10 @@ INSTALLED_APPS = [
     "allauth_ens.providers.clipper",
 ]
 
+
+###
+# List the installed middlewares
+
 MIDDLEWARE = [
     "django.middleware.security.SecurityMiddleware",
     "django.contrib.sessions.middleware.SessionMiddleware",
@@ -74,9 +70,21 @@ MIDDLEWARE = [
     "django.contrib.auth.middleware.AuthenticationMiddleware",
     "django.contrib.messages.middleware.MessageMiddleware",
     "django.middleware.clickjacking.XFrameOptionsMiddleware",
+    "allauth.account.middleware.AccountMiddleware",
 ]
 
-ROOT_URLCONF = "WikiENS.urls"
+
+###
+# The main url configuration
+
+ROOT_URLCONF = "app.urls"
+
+
+###
+# Template configuration:
+#   - Django Templating Language is used
+#   - Application directories can be used
+
 
 TEMPLATES = [
     {
@@ -90,65 +98,72 @@ TEMPLATES = [
                 "django.contrib.auth.context_processors.auth",
                 "django.contrib.messages.context_processors.messages",
                 "sekizai.context_processors.sekizai",
-            ]
+            ],
+        },
     },
-    }
 ]
 
-WSGI_APPLICATION = "WikiENS.wsgi.application"
 
-SITE_ID = 1
+###
+# Database configuration
+#   -> https://docs.djangoproject.com/en/4.2/ref/settings/#databases
 
+DEFAULT_AUTO_FIELD = "django.db.models.AutoField"
 
-# Database
-# https://docs.djangoproject.com/en/1.11/ref/settings/#databases
-
-DATABASES = {
-    "default": {
-        "ENGINE": "django.db.backends.postgresql",
-        "NAME": DBNAME,
-        "USER": DBUSER,
-        "PASSWORD": DBPASSWD,
-        "HOST": "localhost",
-    }
-}
-
-
-# Password validation
-# https://docs.djangoproject.com/en/1.11/ref/settings/#auth-password-validators
-
-AUTH_PASSWORD_VALIDATORS = [
+DATABASES = credentials.get_json(
+    "DATABASES",
     {
-        "NAME": (
-            # XXX. Cette chaîne est très longue… Je la coupe en deux sinon
-            # black ne me fiche pas la paix (mais c'est vraiment nul)
-            "django.contrib.auth.password_validation."
-            "UserAttributeSimilarityValidator"
-        )
+        "default": {
+            "ENGINE": "django.db.backends.sqlite3",
+            "NAME": BASE_DIR / "db.sqlite3",
+        }
     },
-    {"NAME": "django.contrib.auth.password_validation.MinimumLengthValidator"},
-    {"NAME": "django.contrib.auth.password_validation.CommonPasswordValidator"},
-    {"NAME": "django.contrib.auth.password_validation.NumericPasswordValidator"},
-]
+)
+
+CACHES = credentials.get_json(
+    "CACHES",
+    default={
+        "default": {
+            "BACKEND": "django.core.cache.backends.locmem.LocMemCache",
+        },
+    },
+)
 
 
-# Internationalization
-# https://docs.djangoproject.com/en/1.11/topics/i18n/
+###
+# WSGI application configuration
+
+WSGI_APPLICATION = "app.wsgi.application"
+
+
+###
+# Staticfiles configuration
+
+STATIC_ROOT = credentials["STATIC_ROOT"]
+STATIC_URL = "/static/"
+
+MEDIA_ROOT = credentials.get("MEDIA_ROOT", BASE_DIR / "media")
+MEDIA_URL = "/media/"
+
+
+###
+# Internationalization configuration
+#   -> https://docs.djangoproject.com/en/4.2/topics/i18n/
 
 LANGUAGE_CODE = "fr-fr"
-
 TIME_ZONE = "Europe/Paris"
 
 USE_I18N = True
-
 USE_L10N = True
-
 USE_TZ = True
 
+LANGUAGES = [
+    ("fr", _("Français")),
+]
 
-# Authentication
-# https://docs.djangoproject.com/en/1.11/ref/settings/#auth
-# https://django-allauth.readthedocs.io/en/latest/index.html
+
+###
+# Authentication configuration
 
 AUTHENTICATION_BACKENDS = [
     "allauth.account.auth_backends.AuthenticationBackend",
@@ -180,14 +195,18 @@ SOCIALACCOUNT_PROVIDERS = {
     },
 }
 
+AUTH_PASSWORD_VALIDATORS = [
+    {"NAME": f"django.contrib.auth.password_validation.{v}"}
+    for v in [
+        "UserAttributeSimilarityValidator",
+        "MinimumLengthValidator",
+        "CommonPasswordValidator",
+        "NumericPasswordValidator",
+    ]
+]
 
-# Static / media contents
-
-STATIC_URL = "/_static/"
-MEDIA_URL = "/_media/"
-
-
-# WIKI SETTINGS
+###
+# Wiki configuration
 
 WIKI_ATTACHMENTS_EXTENSIONS = [
     "pdf",
@@ -209,12 +228,6 @@ WIKI_ATTACHMENTS_EXTENSIONS = [
 WIKI_REVISIONS_PER_HOUR = 180
 WIKI_REVISIONS_PER_MINUTES = 180
 
-# Dark magic - tell django to use X-Forwarded-*
-# This is needed for django-allauth-cas, see
-# https://blog.ubuntu.com/2015/08/18/django-behind-a-proxy-fixing-absolute-urls
-USE_X_FORWARDED_HOST = True
-SECURE_PROXY_SSL_HEADER = ("HTTP_X_FORWARDED_PROTO", "https")
-
 # Use sign up, login, logout, profile settings views of allauth.
 WIKI_ACCOUNT_HANDLING = False
 
@@ -226,3 +239,10 @@ WIKI_ACCOUNT_SIGNUP_ALLOWED = True
 # will be treated as the others_write boolean field on models.Article.
 WIKI_ANONYMOUS_WRITE = False
 WIKI_ANONYMOUS = False
+
+
+# FIXME: Add correct email settings
+
+# Development settings
+if DEBUG:
+    EMAIL_BACKEND = "django.core.mail.backends.console.EmailBackend"

app/urls.py

@@ -0,0 +1,20 @@
+from allauth_ens.views import capture_login, capture_logout
+from django.contrib import admin
+from django.urls import include, path
+
+allauth_urls = [
+    # Catch login/logout views of admin site.
+    path("admin/login/", capture_login),
+    path("admin/logout/", capture_logout),
+    # Allauth urls.
+    path("profil/", include("allauth.urls")),
+]
+
+urlpatterns = allauth_urls + [
+    path("_admin/", admin.site.urls),
+    path("notifications/", include("django_nyt.urls")),
+    path("_groups/", include("wiki_groups.urls")),
+    path("", include("wiki.urls")),
+]
+
+# TODO add MEDIA_ROOT

app/wsgi.py

@@ -11,6 +11,6 @@ import os
 
 from django.core.wsgi import get_wsgi_application
 
-os.environ.setdefault("DJANGO_SETTINGS_MODULE", "WikiENS.settings")
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "app.settings")
 
 application = get_wsgi_application()

default.nix

@@ -0,0 +1,45 @@
+{
+  sources ? import ./npins,
+  pkgs ? import sources.nixpkgs { },
+}:
+
+let
+  nix-pkgs = import sources.nix-pkgs { inherit pkgs; };
+
+  python3 = pkgs.python3.override {
+    packageOverrides = _: _: {
+      inherit (nix-pkgs) django-allauth-ens django-wiki loadcredential;
+    };
+  };
+in
+
+{
+  devShell = pkgs.mkShell {
+    name = "annuaire.dev";
+
+    packages = [
+      (python3.withPackages (ps: [
+        ps.django
+        ps.django-allauth-ens
+        ps.django-wiki
+        ps.loadcredential
+        ps.tinycss2
+      ]))
+    ];
+
+    env = {
+      DJANGO_SETTINGS_MODULE = "app.settings";
+
+      CREDENTIALS_DIRECTORY = builtins.toString ./.credentials;
+
+      WIKIENS_DEBUG = builtins.toJSON true;
+      WIKIENS_STATIC_ROOT = builtins.toString ./.static;
+    };
+
+    shellHook = ''
+      if [ ! -d .static ]; then
+        mkdir .static
+      fi
+    '';
+  };
+}

manage.py

@@ -3,7 +3,7 @@ import os
 import sys
 
 if __name__ == "__main__":
-    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "WikiENS.settings.local")
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "app.settings")
     try:
         from django.core.management import execute_from_command_line
     except ImportError:

npins/default.nix

@@ -0,0 +1,80 @@
+# Generated by npins. Do not modify; will be overwritten regularly
+let
+  data = builtins.fromJSON (builtins.readFile ./sources.json);
+  version = data.version;
+
+  mkSource =
+    spec:
+    assert spec ? type;
+    let
+      path =
+        if spec.type == "Git" then
+          mkGitSource spec
+        else if spec.type == "GitRelease" then
+          mkGitSource spec
+        else if spec.type == "PyPi" then
+          mkPyPiSource spec
+        else if spec.type == "Channel" then
+          mkChannelSource spec
+        else
+          builtins.throw "Unknown source type ${spec.type}";
+    in
+    spec // { outPath = path; };
+
+  mkGitSource =
+    {
+      repository,
+      revision,
+      url ? null,
+      hash,
+      branch ? null,
+      ...
+    }:
+    assert repository ? type;
+    # At the moment, either it is a plain git repository (which has an url), or it is a GitHub/GitLab repository
+    # In the latter case, there we will always be an url to the tarball
+    if url != null then
+      (builtins.fetchTarball {
+        inherit url;
+        sha256 = hash; # FIXME: check nix version & use SRI hashes
+      })
+    else
+      assert repository.type == "Git";
+      let
+        urlToName =
+          url: rev:
+          let
+            matched = builtins.match "^.*/([^/]*)(\\.git)?$" repository.url;
+
+            short = builtins.substring 0 7 rev;
+
+            appendShort = if (builtins.match "[a-f0-9]*" rev) != null then "-${short}" else "";
+          in
+          "${if matched == null then "source" else builtins.head matched}${appendShort}";
+        name = urlToName repository.url revision;
+      in
+      builtins.fetchGit {
+        url = repository.url;
+        rev = revision;
+        inherit name;
+        # hash = hash;
+      };
+
+  mkPyPiSource =
+    { url, hash, ... }:
+    builtins.fetchurl {
+      inherit url;
+      sha256 = hash;
+    };
+
+  mkChannelSource =
+    { url, hash, ... }:
+    builtins.fetchTarball {
+      inherit url;
+      sha256 = hash;
+    };
+in
+if version == 3 then
+  builtins.mapAttrs (_: mkSource) data.pins
+else
+  throw "Unsupported format version ${toString version} in sources.json. Try running `npins upgrade`"

npins/sources.json

@@ -0,0 +1,22 @@
+{
+  "pins": {
+    "nix-pkgs": {
+      "type": "Git",
+      "repository": {
+        "type": "Git",
+        "url": "https://git.hubrecht.ovh/hubrecht/nix-pkgs"
+      },
+      "branch": "main",
+      "revision": "6f56463c0034d4162dabb98ee8e70d6c43214ac0",
+      "url": null,
+      "hash": "0dqm2n88f0yl63wacizwpjrcv51arz5z31nhwbjcbyjxrwiwxamq"
+    },
+    "nixpkgs": {
+      "type": "Channel",
+      "name": "nixpkgs-unstable",
+      "url": "https://releases.nixos.org/nixpkgs/nixpkgs-24.11pre694416.ccc0c2126893/nixexprs.tar.xz",
+      "hash": "0cn1z4wzps8nfqxzr6l5mbn81adcqy2cy2ic70z13fhzicmxfsbx"
+    }
+  },
+  "version": 3
+}

requirements.txt

@@ -1,3 +0,0 @@
-Django==2.2.*
-git+https://git.eleves.ens.fr/klub-dev-ens/django-allauth-ens.git@1.1.3
-wiki==0.7

requirements_prod.txt

@@ -1,3 +0,0 @@
--r requirements.txt
-psycopg2
-gunicorn

shared/templates/wiki/base.html

@@ -1,6 +1,5 @@
 {% extends "wiki/base_site.html" %}
-{% load i18n staticfiles %}
-{% load sekizai_tags %}
+{% load i18n static sekizai_tags %}
 
 {% block wiki_site_title %} - WikiENS{% endblock %}
 
@@ -11,49 +10,49 @@
 {% endblock %}
 
 {% block wiki_header_navlinks %}
-<ul class="nav navbar-nav">
-  <li class="active"><a href="{% url 'wiki:root' %}">Accueil</a></li>
+<ul class="navbar-nav mr-auto">
+  <li class="nav-item">
+    <a class="nav-link text-primary" href="{% url 'wiki:root' %}">Accueil</a>
+  </li>
 </ul>
 
 <div class="navbar-right">
-  <ul class="nav navbar-nav">
+  <ul class="navbar-nav">
     {% if user.is_authenticated %}
-    <li class="dropdown">
-      <a href="#" class="dropdown-toggle" data-toggle="dropdown">
+    <li class="nav-item dropdown">
+      <a class="nav-link dropdown-toggle" href="#" class="dropdown-toggle" data-toggle="dropdown">
         {% trans "Paramètres de compte" %}
-        <b class="caret"></b>
       </a>
-      <ul class="dropdown-menu">
-        <li>
-          <a href="{% url "account_email" %}">
+      <div class="dropdown-menu">
+        <a class="dropdown-item" href="{% url 'account_email' %}">
           <i class="fa fa-envelope"></i>
           {% trans "Email" %}
         </a>
-        </li>
-        <li>
-          <a href="{% url "account_change_password" %}">
+        <a class="dropdown-item" href="{% url 'account_change_password' %}">
           <i class="fa fa-lock"></i>
           {% trans "Mot de passe" %}
         </a>
-        </li>
-        <li>
-          <a href="{% url "socialaccount_connections" %}" title="Clipper…">
-            <i class="fa fa-sign-in"></i>
+        <a class="dropdown-item" href="{% url 'socialaccount_connections' %}" title="Clipper…">
+          <i class="fa fa-sign-in-alt"></i>
           {% trans "Connexions par tiers" %}
         </a>
-        </li>
-        <li class="divider"></span>
-        <li>
-          <a href="{% url "account_logout" %}">
+        {% if request.user.is_staff or request.user.managed_groups.exists %}
+        <div class="dropdown-divider"></div>
+        <a class="dropdown-item" href="{% url 'wiki_groups:managed-groups' %}">
+          <i class="fa fa-cog"></i>
+          {% trans "Liste des groupes gérés" %}
+        </a>
+        {% endif %}
+        <div class="dropdown-divider"></div>
+        <a class="dropdown-item" href="{% url 'account_logout' %}">
           <i class="fa fa-power-off"></i>
           {% trans "Déconnexion" %}
         </a>
-        </li>
-      </ul>
+      </div>
     </li>
     {% else %}
-    <li>
-      <a href="{% url "account_signup" %}">{% trans "Sign Up" %}</a>
+    <li class="nav-item">
+      <a class="nav-link" href="{% url 'account_signup' %}">{% trans "Sign Up" %}</a>
     </li>
     {% endif %}
   </ul>
@@ -62,5 +61,5 @@
 
 {% block wiki_footer_logo %}
 <a href="http://www.eleves.ens.fr" class="pull-right"><img height="100px" src="{% static 'img/logoEleves.png' %}" /></a>
-<p>Wiki maintenu par les élèves de l'École normale supérieure. <br /> En cas de pépin contacter <tt>cof-geek [chez] ens [point] fr</tt></p>
+<p>Wiki maintenu par les élèves de l'École normale supérieure. <br /> En cas de pépin contacter <tt>klub-dev [chez] ens [point] fr</tt></p>
 {% endblock %}

shell.nix

@@ -0,0 +1 @@
+(import ./. { }).devShell

wiki_groups/__init__.py

@@ -1 +0,0 @@
-default_app_config = "wiki_groups.apps.WikiGroupsConfig"

wiki_groups/forms.py

@@ -0,0 +1,52 @@
+from django import forms
+from django.contrib.auth import get_user_model
+from django.contrib.auth.models import Group
+
+from wiki_groups.models import WikiGroup
+
+User = get_user_model()
+
+
+class SelectUserForm(forms.Form):
+    user = forms.CharField(max_length=150)
+
+    def clean_user(self):
+        user = User.objects.filter(username=self.cleaned_data["user"]).first()
+
+        if user is None:
+            self.add_error(
+                "user", "Aucune utilisatrice ou utilisateur avec ce login n'existe."
+            )
+
+        return user
+
+
+class SelectGroupForm(forms.Form):
+    group = forms.CharField(max_length=150)
+
+    def clean_group(self):
+        group = WikiGroup.objects.filter(
+            django_group__name=self.cleaned_data["group"]
+        ).first()
+
+        if group is None:
+            self.add_error("group", "Aucun groupe avec ce nom n'existe.")
+
+        return group
+
+
+class CreateGroupForm(forms.Form):
+    group = forms.CharField(max_length=150)
+
+    def clean_group(self):
+        name = self.cleaned_data["group"]
+
+        django_group, created = Group.objects.get_or_create(name=name)
+
+        if hasattr(django_group, "wikigroup"):
+            self.add_error("group", "Un groupe avec ce nom existe déjà.")
+            return None
+
+        group = WikiGroup.objects.create(django_group=django_group)
+
+        return group

wiki_groups/migrations/0002_wikigroup_managers.py

@@ -0,0 +1,20 @@
+# Generated by Django 2.2.19 on 2021-07-23 09:01
+
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('wiki_groups', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='wikigroup',
+            name='managers',
+            field=models.ManyToManyField(blank=True, related_name='managed_groups', to=settings.AUTH_USER_MODEL),
+        ),
+    ]

wiki_groups/models.py

@@ -1,12 +1,14 @@
-from django.db import models
-from django.contrib.auth.models import Group as DjangoGroup
 from django.contrib.auth import get_user_model
-from django.db.models.signals import post_save, m2m_changed
+from django.contrib.auth.models import Group as DjangoGroup
+from django.db import models
+from django.db.models.signals import m2m_changed, post_save
 from django.dispatch import receiver
 
+User = get_user_model()
+
 
 class WikiGroup(models.Model):
-    """ A structured user group, used to grant permissions on sub-wikis
+    """A structured user group, used to grant permissions on sub-wikis
 
     This model contains a structured group of users, in the sense that a group contains
     both users and other groups, allowing a DAG group structure.
@@ -20,8 +22,8 @@ class WikiGroup(models.Model):
     """
 
     class CyclicStructureException(Exception):
-        """ Exception raised when a new edge introduces a cycle in the groups'
-        structure """
+        """Exception raised when a new edge introduces a cycle in the groups'
+        structure"""
 
         def __init__(self, from_group, to_group):
             self.from_group = from_group
@@ -40,22 +42,54 @@ class WikiGroup(models.Model):
         related_name="included_in_groups",
         blank=True,
     )
-    users = models.ManyToManyField(get_user_model(), blank=True)
+    users = models.ManyToManyField(User, blank=True)
+    managers = models.ManyToManyField(User, related_name="managed_groups", blank=True)
 
     def __str__(self):
         return str(self.django_group)
 
     def get_all_users(self):
-        """ Get the queryset of all the users in this group, including recursively
-        included users """
+        """Get the queryset of all the users in this group, including recursively
+        included users"""
         users_set = self.users.all()
         for subgroup in self.includes_groups.all():
             users_set = users_set.union(subgroup.get_all_users())
         return users_set
 
+    def is_manager(self, user):
+        """Checks wether the user is a manager of this group or any subgroup"""
+
+        # Base case: the user is an explicit manager
+        if user in self.managers.all():
+            return True
+
+        for subgroup in self.includes_groups.all():
+            # If the user is a manager of a subgroup
+            if subgroup.is_manager(user):
+                return True
+
+        return False
+
+    def get_all_groups(self, already_notified=None):
+        """Returns the set of metagroups i.e. self plus the list of groups including
+        this group recursively"""
+
+        if already_notified is None:
+            already_notified = set()
+        elif self.pk in already_notified:
+            return set()
+        already_notified.add(self.pk)
+
+        groups = {self}
+
+        for metagroup in self.included_in_groups.all():
+            groups |= metagroup.get_all_groups(already_notified=already_notified)
+
+        return groups
+
     def propagate_update(self, already_notified=None):
-        """ Commits itself to the Django group, and calls this method on every group in
-        `included_in_groups` """
+        """Commits itself to the Django group, and calls this method on every group in
+        `included_in_groups`"""
 
         # Check that we did not already propagate the update signal to this group
         if already_notified is None:
@@ -69,20 +103,20 @@ class WikiGroup(models.Model):
             metagroup.propagate_update(already_notified=already_notified)
 
     def commit_to_django_group(self):
-        """ Writes this model's data to the related Django group """
+        """Writes this model's data to the related Django group"""
 
         self.django_group.user_set.set(self.get_all_users())
 
     def group_in_cycle(self, with_children):
-        """ Checks whether this group would be in a group cycle if it had
+        """Checks whether this group would be in a group cycle if it had
         `with_children` as child nodes. This assumes that the graph currently stored is
         acyclic.
 
         Returns `None` if no cycle is found, else retuns a child from `with_children`
-        causing the cycle to appear. """
+        causing the cycle to appear."""
 
         def do_dfs(cur_node, visited_nodes):
-            """ DFS to check whether we find `self` again """
+            """DFS to check whether we find `self` again"""
             if cur_node.pk in visited_nodes:
                 return False
             if cur_node.pk == self.pk:
@@ -103,7 +137,7 @@ class WikiGroup(models.Model):
 
 @receiver(post_save, sender=WikiGroup, dispatch_uid="on_wiki_group_changed")
 def on_wiki_group_changed(sender, instance, **kwargs):
-    """ Commit the related WikiGroups to Django Group upon model change """
+    """Commit the related WikiGroups to Django Group upon model change"""
     instance.propagate_update()
 
 
@@ -113,8 +147,8 @@ def on_wiki_group_changed(sender, instance, **kwargs):
     dispatch_uid="on_wiki_group_includes_changed",
 )
 def on_wiki_group_includes_changed(sender, instance, action, **kwargs):
-    """ Commit the related WikiGroups to Django Group upon change of the set of
-    included other groups """
+    """Commit the related WikiGroups to Django Group upon change of the set of
+    included other groups"""
     if action in ["post_add", "post_remove", "post_clear"]:
         instance.propagate_update()
 
@@ -125,7 +159,7 @@ def on_wiki_group_includes_changed(sender, instance, action, **kwargs):
     dispatch_uid="on_wiki_group_users_changed",
 )
 def on_wiki_group_users_changed(sender, instance, action, **kwargs):
-    """ Commit the related WikiGroups to Django Group upon change of included users """
+    """Commit the related WikiGroups to Django Group upon change of included users"""
     if action in ["post_add", "post_remove", "post_clear"]:
         instance.propagate_update()
 
@@ -136,7 +170,7 @@ def on_wiki_group_users_changed(sender, instance, action, **kwargs):
     dispatch_uid="on_wiki_group_includes_check_acyclic",
 )
 def on_wiki_group_includes_check_acyclic(sender, instance, action, pk_set, **kwargs):
-    """ Checks the acyclicity of the groups' graph before committing new edges.
+    """Checks the acyclicity of the groups' graph before committing new edges.
 
     PLEASE NOTE that this check is only a fallback, and that forms should validate
     the acyclicity before committing anything.

wiki_groups/templates/wiki_groups/admin.html

@@ -0,0 +1,207 @@
+{% extends "wiki/base.html" %}
+{% load sekizai_tags %}
+
+{% block wiki_site_title %}Groupes administrés - WikiENS{% endblock %}
+
+{% block wiki_contents %}
+<h2>Gestion du groupe « {{ wikigroup }} »</h2>
+<hr>
+
+<div class="container">
+  <div class="row">
+
+    <div class="col">
+      <h4>Liste des membres</h4>
+      <br>
+
+      <div class="list-group">
+        <div class="list-group-item">
+          <form action="{% url 'wiki_groups:add-user' wikigroup.pk %}" method="post">
+            {% csrf_token %}
+            <div class="input-group">
+              <input type="text" class="form-control {% if errors.user %}is-invalid{% endif %}" name="user" value="{{ errors.user.value }}" placeholder="Ajouter un membre">
+              <div class="input-group-append">
+                <button type="submit" class="btn btn-primary rounded-right">Enregistrer</button>
+              </div>
+              {% if errors.user %}
+              {% for msg in errors.user.msg %}
+              <div class="invalid-feedback">{{ msg }}</div>
+              {% endfor %}
+              {% endif %}
+            </div>
+            <small class="form-text text-muted">Entrer le login (clipper) de la personne à ajouter</small>
+          </form>
+        </div>
+
+        {% for user in wikigroup.users.all %}
+        <div class="list-group-item pb-2">
+          <span class="font-italic">{{ user }}</span>
+          <button type="button" class="btn btn-danger btn-sm float-right" data-toggle="modal" data-target="#modal-confirm" data-href="{% url 'wiki_groups:remove-user' wikigroup.pk user.pk %}" data-name="{{ user }}" data-kind="membre">Enlever</a>
+        </div>
+        {% endfor %}
+      </div>
+    </div>
+
+    <div class="col">
+      <h4>Liste des groupes inclus</h4>
+      <br>
+
+      <div class="list-group">
+        <div class="list-group-item">
+          <form action="{% url 'wiki_groups:add-group' wikigroup.pk %}" method="post">
+            {% csrf_token %}
+            <div class="input-group">
+              <input type="text" class="form-control {% if errors.group_add %}is-invalid{% endif %}" name="group" value="{{ errors.group_add.value }}" placeholder="Ajouter un groupe existant">
+              <div class="input-group-append">
+                <button type="submit" class="btn btn-primary rounded-right">Enregistrer</button>
+              </div>
+              {% if errors.group_add %}
+              {% for msg in errors.group_add.msg %}
+              <div class="invalid-feedback">{{ msg }}</div>
+              {% endfor %}
+              {% endif %}
+            </div>
+            <small class="form-text text-muted">Entrer le nom du groupe à ajouter</small>
+          </form>
+        </div>
+
+        {% for group in wikigroup.includes_groups.all %}
+        <div class="list-group-item pb-2">
+          <span class="font-italic">{{ group }}</span>
+          <button type="button" class="btn btn-danger btn-sm float-right" data-toggle="modal" data-target="#modal-confirm" data-href="{% url 'wiki_groups:remove-group' wikigroup.pk group.pk %}" data-name="{{ group }}" data-kind="groupe">Enlever</a>
+        </div>
+        {% endfor %}
+
+        <div class="list-group-item">
+          <form action="{% url 'wiki_groups:create-group' wikigroup.pk %}" method="post">
+            {% csrf_token %}
+            <div class="input-group">
+              <input type="text" class="form-control {% if errors.group_create %}is-invalid{% endif %}" name="group" value="{{ errors.group_create.value }}" placeholder="Créer et ajouter un groupe">
+              <div class="input-group-append">
+                <button type="submit" class="btn btn-primary rounded-right">Enregistrer</button>
+              </div>
+              {% if errors.group_create %}
+              {% for msg in errors.group_create.msg %}
+              <div class="invalid-feedback">{{ msg }}</div>
+              {% endfor %}
+              {% endif %}
+            </div>
+            <small class="form-text text-muted">Entrer le nom du groupe à créer</small>
+          </form>
+        </div>
+      </div>
+    </div>
+  </div>
+  <hr>
+
+  <div class="row">
+    <div class="col-6">
+      <h4>Liste des gestionnaires</h4>
+      <br>
+
+      <div class="list-group">
+        <div class="list-group-item">
+          <form action="{% url 'wiki_groups:add-manager' wikigroup.pk %}" method="post">
+            {% csrf_token %}
+            <div class="input-group">
+              <input type="text" class="form-control {% if errors.manager %}is-invalid{% endif %}" name="user" value="{{ errors.manager.value }}" placeholder="Ajouter un·e gestionnaire">
+              <div class="input-group-append">
+                <button type="submit" class="btn btn-primary rounded-right">Enregistrer</button>
+              </div>
+              {% if errors.manager %}
+              {% for msg in errors.manager.msg %}
+              <div class="invalid-feedback">{{ msg }}</div>
+              {% endfor %}
+              {% endif %}
+            </div>
+            <small class="form-text text-muted">Entrer le login (clipper) de la personne à ajouter</small>
+          </form>
+        </div>
+
+        {% for user in wikigroup.managers.all %}
+        <div class="list-group-item pb-2">
+          <span class="font-italic">{{ user }}</span>
+          <button type="button" class="btn btn-danger btn-sm float-right" data-toggle="modal" data-target="#modal-confirm" data-href="{% url 'wiki_groups:remove-manager' wikigroup.pk user.pk %}" data-name="{{ user }}" data-kind="gestionnaire">Enlever</a>
+        </div>
+        {% endfor %}
+      </div>
+    </div>
+
+    {% if request.user.is_staff %}
+    <div class="col">
+      <h4>Supprimer ce groupe</h4>
+      <br>
+
+      <div class="jumbotron">
+        <p class="text-danger">Attention, cette action est irréversible.</p>
+        <button type="button" class="btn btn-danger" data-toggle="modal" data-target="#modal-delete">Supprimer</a>
+      </div>
+    </div>
+
+    <div class="modal fade" id="modal-delete">
+      <div class="modal-dialog">
+        <div class="modal-content">
+          <div class="modal-header">
+            <h5 class="modal-title">Supprimer le groupe {{ wikigroup }} ?</h5>
+            <button type="button" class="close" data-dismiss="modal" aria-label="Close">
+              <span aria-hidden="true">&times;</span>
+            </button>
+          </div>
+
+          <div class="modal-body">
+            La suppression du groupe « {{ wikigroup }} » est irréversible et tous ses membres seront enlevés des groupes suivants :
+            <ul>
+              {% for g in wikigroup.get_all_groups %}
+              <li>{{ g }}</li>
+              {% endfor %}
+            </ul>
+          </div>
+
+          <div class="modal-footer">
+            <button type="button" class="btn btn-secondary" data-dismiss="modal">Annuler</button>
+            <a class="btn btn-danger" href="{% url 'wiki_groups:delete-group' wikigroup.pk %}">Supprimer</a>
+          </div>
+        </div>
+      </div>
+    </div>
+    {% endif %}
+  </div>
+</div>
+
+{# Confirmation modal #}
+<div class="modal fade" id="modal-confirm">
+  <div class="modal-dialog" role="document">
+    <div class="modal-content">
+      <div class="modal-header">
+        <h5 class="modal-title"></h5>
+        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
+          <span aria-hidden="true">&times;</span>
+        </button>
+      </div>
+
+      <div class="modal-body">
+      </div>
+
+      <div class="modal-footer">
+        <button type="button" class="btn btn-secondary" data-dismiss="modal">Annuler</button>
+        <a class="btn btn-danger">Enlever</a>
+      </div>
+    </div>
+  </div>
+</div>
+
+{% addtoblock "js" %}
+<script>
+  $('#modal-confirm').on('show.bs.modal', function(event) {
+    const b = $(event.relatedTarget);
+
+    const modal = $(this);
+    modal.find('.modal-title').text(`Enlever un ${b.data('kind')}`);
+    modal.find('.modal-body').html(`Enlever <span class="font-weight-bold font-italic">${b.data('name')}</span> en tant que ${b.data('kind')} du groupe {{ wikigroup }} ?`);
+    modal.find('.modal-footer a').prop('href', b.data('href'));
+  });
+
+</script>
+{% endaddtoblock %}
+
+{% endblock %}

wiki_groups/templates/wiki_groups/graph.html

@@ -1,37 +0,0 @@
-{% extends "wiki/base.html" %}
-{% load staticfiles %}
-
-{% block wiki_site_title %}Groupes - WikiENS{% endblock %}
-
-{% block wiki_contents %}
-  <h2>Graphe des groupes du wiki</h2>
-
-  <hr />
-
-  <div id="svg-graph"></div>
-
-  <hr />
-
-  <p>
-    Les flèches représentent l'inclusion : <code>A -&gt; B</code> signifie que
-    le groupe <code>A</code> est contenu dans le groupe <code>B</code>.
-  </p>
-
-  <script src="{% static 'wiki_groups/js/vendor/viz.js' %}"></script>
-  <script src="{% static 'wiki_groups/js/vendor/lite.render.js' %}"></script>
-  <script>
-    var viz = new Viz();
-    
-    var xhttp = new XMLHttpRequest();
-    xhttp.onreadystatechange = function() {
-      if (this.readyState == 4 && this.status == 200) {
-        viz.renderSVGElement(this.responseText)
-        .then(element => {
-          document.getElementById("svg-graph").appendChild(element);
-        })
-      }
-    };
-    xhttp.open("GET", "{% url 'wiki_groups:dot_graph' %}", true);
-    xhttp.send();
-  </script>
-{% endblock %}

wiki_groups/templates/wiki_groups/list.html

@@ -0,0 +1,52 @@
+{% extends "wiki/base.html" %}
+{% load static %}
+
+{% block wiki_site_title %}Groupes - WikiENS{% endblock %}
+
+{% block wiki_contents %}
+<h2>
+  Liste des groupes du wiki
+  {% if request.user.is_staff or request.user.managed_groups.exists %}
+  <a class="btn btn-primary float-right" href="{% url 'wiki_groups:managed-groups' %}">
+    Liste des groupes gérés
+  </a>
+  {% endif %}
+</h2>
+<hr>
+
+<ul>
+  {% for group in wikigroup_list %}
+  <li>{{ group.django_group.name }} {% if group.managers.exists %}(Géré par {% for m in group.managers.all %}{{ m }}{% if not forloop.last %}, {% endif %}{% endfor %}){% endif %}</li>
+  {% endfor %}
+</ul>
+
+<h2>Graphe des groupes du wiki</h2>
+<hr>
+
+<div id="svg-graph" class="overflow-auto"></div>
+<hr>
+
+<p>
+  Les flèches représentent l'inclusion : <code>A -&gt; B</code> signifie que
+  le groupe <code>A</code> est contenu dans le groupe <code>B</code>.
+</p>
+
+<script src="{% static 'wiki_groups/js/vendor/viz.js' %}"></script>
+<script src="{% static 'wiki_groups/js/vendor/lite.render.js' %}"></script>
+<script>
+  var viz = new Viz();
+
+  var xhttp = new XMLHttpRequest();
+  xhttp.onreadystatechange = function() {
+    if (this.readyState == 4 && this.status == 200) {
+      viz.renderSVGElement(this.responseText)
+        .then(element => {
+          document.getElementById("svg-graph").appendChild(element);
+        })
+    }
+  };
+  xhttp.open('GET', '{% url 'wiki_groups:dot_graph' %}', true);
+  xhttp.send();
+
+</script>
+{% endblock %}

wiki_groups/templates/wiki_groups/managed.html

@@ -0,0 +1,18 @@
+{% extends "wiki/base.html" %}
+
+{% block wiki_site_title %}Groupes administrés - WikiENS{% endblock %}
+
+{% block wiki_contents %}
+<h2>Liste des groupes administrés</h2>
+<hr>
+
+{% if wikigroup_list %}
+<div class="list-group">
+  {% for group in wikigroup_list %}
+  <a class="list-group-item list-group-item-action" href="{% url 'wiki_groups:admin-group' group.pk %}">{{ group }}</a>
+  {% endfor %}
+</div>
+{% endif %}
+
+
+{% endblock %}

wiki_groups/urls.py

@@ -1,9 +1,31 @@
 from django.urls import path
-from wiki_groups import views
 
+from wiki_groups import views
 
 app_name = "wiki_groups"
 urlpatterns = [
+    path("", views.GroupList.as_view(), name="list"),
     path("dot_graph", views.dot_graph, name="dot_graph"),
-    path("graph", views.graph, name="graph"),
+    path("managed", views.ManagedGroupsView.as_view(), name="managed-groups"),
+    path("<int:pk>", views.WikiGroupView.as_view(), name="admin-group"),
+    path(
+        "<int:pk>/rm-user/<int:user_pk>",
+        views.RemoveUserView.as_view(),
+        name="remove-user",
+    ),
+    path(
+        "<int:pk>/rm-manager/<int:user_pk>",
+        views.RemoveManagerView.as_view(),
+        name="remove-manager",
+    ),
+    path(
+        "<int:pk>/rm-group/<int:group_pk>",
+        views.RemoveGroupView.as_view(),
+        name="remove-group",
+    ),
+    path("<int:pk>/add-user", views.AddUserView.as_view(), name="add-user"),
+    path("<int:pk>/add-manager", views.AddManagerView.as_view(), name="add-manager"),
+    path("<int:pk>/add-group", views.AddGroupView.as_view(), name="add-group"),
+    path("<int:pk>/create-group", views.CreateGroupView.as_view(), name="create-group"),
+    path("<int:pk>/delete", views.DeleteGroupView.as_view(), name="delete-group"),
 ]

wiki_groups/views.py

@@ -1,8 +1,16 @@
-from django.http import HttpResponse
-from django.views.generic import TemplateView
+from django.contrib.auth import get_user_model
+from django.contrib.auth.mixins import LoginRequiredMixin, UserPassesTestMixin
+from django.http import HttpResponse, HttpResponseRedirect
+from django.urls import reverse, reverse_lazy
+from django.views.generic import DetailView, ListView, RedirectView
+from django.views.generic.detail import SingleObjectMixin
+from django.views.generic.edit import BaseFormView
 
+from wiki_groups.forms import CreateGroupForm, SelectGroupForm, SelectUserForm
 from wiki_groups.models import WikiGroup
 
+User = get_user_model()
+
 
 def dot_graph(request):
     response = HttpResponse(content_type="text/vnd.graphviz")
@@ -22,4 +30,214 @@ def dot_graph(request):
     return response
 
 
-graph = TemplateView.as_view(template_name="wiki_groups/graph.html")
+class GroupList(ListView):
+    template_name = "wiki_groups/list.html"
+    model = WikiGroup
+
+    def get_queryset(self):
+        return WikiGroup.objects.select_related("django_group").order_by(
+            "django_group__name"
+        )
+
+
+class WikiGroupMixin(SingleObjectMixin, UserPassesTestMixin):
+    """
+    Restricts the view to a manager of the wikigroup, and selects automatically
+    the required WikiGroup with its Django group
+    """
+
+    model = WikiGroup
+
+    def get_queryset(self):
+        return super().get_queryset().select_related("django_group")
+
+    def test_func(self):
+        self.object = self.get_object()
+        return self.request.user.is_staff or self.object.is_manager(self.request.user)
+
+
+class StaffMixin(UserPassesTestMixin):
+    """Restricts the view to a staff member"""
+
+    def test_func(self):
+        return self.request.user.is_staff
+
+
+class ManagedGroupsView(LoginRequiredMixin, ListView):
+    model = WikiGroup
+    template_name = "wiki_groups/managed.html"
+
+    def get_queryset(self):
+        if self.request.user.is_staff:
+            return WikiGroup.objects.select_related("django_group")
+        return self.request.user.managed_groups.select_related("django_group")
+
+    def get_context_data(self, **kwargs):
+        ctx = super().get_context_data(**kwargs)
+        wikigroups = set()
+
+        for group in ctx["wikigroup_list"]:
+            wikigroups |= group.get_all_groups()
+
+        ctx["wikigroup_list"] = wikigroups
+        ctx["object_list"] = wikigroups
+
+        return ctx
+
+
+class WikiGroupView(WikiGroupMixin, DetailView):
+    template_name = "wiki_groups/admin.html"
+
+    def get_context_data(self, **kwargs):
+        kwargs.update({"errors": self.request.session.pop("wiki_form_errors", None)})
+        return super().get_context_data(**kwargs)
+
+
+class RemoveUserView(WikiGroupMixin, RedirectView):
+    def get_redirect_url(self, *args, **kwargs):
+        return reverse("wiki_groups:admin-group", args=[kwargs["pk"]])
+
+    def get(self, request, *args, **kwargs):
+        user = User.objects.filter(pk=kwargs["user_pk"]).first()
+
+        if user is not None:
+            self.object.users.remove(user)
+
+        return super().get(request, *args, **kwargs)
+
+
+class RemoveManagerView(WikiGroupMixin, RedirectView):
+    def get_redirect_url(self, *args, **kwargs):
+        return reverse("wiki_groups:admin-group", args=[kwargs["pk"]])
+
+    def get(self, request, *args, **kwargs):
+        user = User.objects.filter(pk=kwargs["user_pk"]).first()
+
+        if user is not None:
+            self.object.users.remove(user)
+
+        self.object.managers.remove(user)
+
+        return super().get(request, *args, **kwargs)
+
+
+class RemoveGroupView(WikiGroupMixin, RedirectView):
+    def get_redirect_url(self, *args, **kwargs):
+        return reverse("wiki_groups:admin-group", args=[kwargs["pk"]])
+
+    def get(self, request, *args, **kwargs):
+        group = WikiGroup.objects.filter(pk=kwargs["group_pk"]).first()
+
+        if group is not None:
+            self.object.includes_groups.remove(group)
+
+        return super().get(request, *args, **kwargs)
+
+
+class AddUserView(WikiGroupMixin, BaseFormView):
+    form_class = SelectUserForm
+
+    def get_success_url(self):
+        return reverse("wiki_groups:admin-group", args=[self.object.pk])
+
+    def form_valid(self, form):
+        self.object.users.add(form.cleaned_data["user"])
+
+        return super().form_valid(form)
+
+    def form_invalid(self, form):
+        self.request.session["wiki_form_errors"] = {
+            "user": {"value": form["user"].value(), "msg": form.errors["user"]}
+        }
+        return HttpResponseRedirect(self.get_success_url())
+
+
+class AddManagerView(WikiGroupMixin, BaseFormView):
+    form_class = SelectUserForm
+
+    def get_success_url(self):
+        return reverse("wiki_groups:admin-group", args=[self.object.pk])
+
+    def form_valid(self, form):
+        self.object.managers.add(form.cleaned_data["user"])
+
+        return super().form_valid(form)
+
+    def form_invalid(self, form):
+        self.request.session["wiki_form_errors"] = {
+            "manager": {"value": form["user"].value(), "msg": form.errors["user"]}
+        }
+        return HttpResponseRedirect(self.get_success_url())
+
+
+class AddGroupView(WikiGroupMixin, BaseFormView):
+    """Adds an existing metagroup to this group"""
+
+    form_class = SelectGroupForm
+
+    def get_success_url(self):
+        return reverse("wiki_groups:admin-group", args=[self.object.pk])
+
+    def form_valid(self, form):
+        subgroup = form.cleaned_data["group"]
+        group = self.object
+
+        if group.group_in_cycle(list(group.includes_groups.all()) + [subgroup]):
+            form.add_error(
+                "group",
+                (
+                    "Ajout impossible sous peine de créer un cycle "
+                    f"({group} est inclus dans {subgroup})"
+                ),
+            )
+            return self.form_invalid(form)
+
+        group.includes_groups.add(subgroup)
+        return super().form_valid(form)
+
+    def form_invalid(self, form):
+        self.request.session["wiki_form_errors"] = {
+            "group_add": {"value": form["group"].value(), "msg": form.errors["group"]}
+        }
+        return HttpResponseRedirect(self.get_success_url())
+
+
+class CreateGroupView(WikiGroupMixin, BaseFormView):
+    """Creates a metagroup included in this group"""
+
+    form_class = CreateGroupForm
+
+    def get_success_url(self):
+        return reverse("wiki_groups:admin-group", args=[self.object.pk])
+
+    def form_valid(self, form):
+        new_group = form.cleaned_data["group"]
+
+        self.object.includes_groups.add(new_group)
+        new_group.managers.add(self.request.user)
+
+        return super().form_valid(form)
+
+    def form_invalid(self, form):
+        self.request.session["wiki_form_errors"] = {
+            "group_create": {
+                "value": form["group"].value(),
+                "msg": form.errors["group"],
+            }
+        }
+        return HttpResponseRedirect(self.get_success_url())
+
+
+class DeleteGroupView(SingleObjectMixin, StaffMixin, RedirectView):
+    model = WikiGroup
+    url = reverse_lazy("wiki_groups:managed-groups")
+
+    def get(self, request, *args, **kwargs):
+        group = self.get_object()
+        # On enlève les membres pour répercuter les changements
+        group.users.clear()
+
+        # On utilise la propagation de la suppression django_group -> wiki_group
+        group.django_group.delete()
+
+        return super().get(request, *args, **kwargs)