Clean setup/retrieve of kfet generic account

kfet/auth/__init__.py

@@ -1 +1,4 @@
 default_app_config = 'kfet.auth.apps.KFetAuthConfig'
+
+KFET_GENERIC_USERNAME = 'kfet_genericteam'
+KFET_GENERIC_TRIGRAMME = 'GNR'

kfet/auth/apps.py

@@ -1,4 +1,5 @@
 from django.apps import AppConfig
+from django.db.models.signals import post_migrate
 from django.utils.translation import ugettext_lazy as _
 
 
@@ -6,3 +7,7 @@ class KFetAuthConfig(AppConfig):
     name = 'kfet.auth'
     label = 'kfetauth'
     verbose_name = _("K-Fêt - Authentification et Autorisation")
+
+    def ready(self):
+        from .utils import setup_kfet_generic_user
+        post_migrate.connect(setup_kfet_generic_user, sender=self)

kfet/auth/backends.py

@@ -2,10 +2,13 @@
 
 import hashlib
 
-from django.contrib.auth.models import User, Permission
-from gestioncof.models import CofProfile
+from django.contrib.auth import get_user_model
 from kfet.models import Account, GenericTeamToken
 
+from .utils import get_kfet_generic_user
+
+User = get_user_model()
+
 
 class KFetBackend(object):
     def authenticate(self, request):
@@ -29,18 +32,7 @@ class GenericTeamBackend(object):
     def authenticate(self, username=None, token=None):
         valid_token = GenericTeamToken.objects.get(token=token)
         if username == 'kfet_genericteam' and valid_token:
-            # Création du user s'il n'existe pas déjà
-            user, _ = User.objects.get_or_create(username='kfet_genericteam')
-            profile, _ = CofProfile.objects.get_or_create(user=user)
-            account, _ = Account.objects.get_or_create(
-                    cofprofile=profile,
-                    trigramme='GNR')
-
-            # Ajoute la permission kfet.is_team à ce user
-            perm_is_team = Permission.objects.get(codename='is_team')
-            user.user_permissions.add(perm_is_team)
-
-            return user
+            return get_kfet_generic_user()
         return None
 
     def get_user(self, user_id):

kfet/auth/migrations/0001_initial.py

@@ -8,6 +8,9 @@ class Migration(migrations.Migration):
 
     dependencies = [
         ('auth', '0006_require_contenttypes_0002'),
+        # Following dependency allows using Account model to set up the kfet
+        # generic user in post_migrate receiver.
+        ('kfet', '0058_delete_genericteamtoken'),
     ]
 
     operations = [

kfet/auth/tests.py

@@ -4,6 +4,10 @@ from django.test import TestCase
 from django.contrib.auth.models import User, Group
 
 from kfet.forms import UserGroupForm
+from kfet.models import Account
+
+from . import KFET_GENERIC_TRIGRAMME, KFET_GENERIC_USERNAME
+from .utils import get_kfet_generic_user
 
 
 class UserGroupFormTests(TestCase):
@@ -54,3 +58,15 @@ class UserGroupFormTests(TestCase):
             [repr(g) for g in [self.other_group] + self.kfet_groups],
             ordered=False,
         )
+
+
+class KFetGenericUserTests(TestCase):
+
+    def test_exists(self):
+        """
+        The account is set up when app is ready, so it should exist.
+        """
+        generic = Account.objects.get_generic()
+        self.assertEqual(generic.trigramme, KFET_GENERIC_TRIGRAMME)
+        self.assertEqual(generic.user.username, KFET_GENERIC_USERNAME)
+        self.assertEqual(get_kfet_generic_user(), generic.user)

kfet/auth/utils.py

@@ -0,0 +1,28 @@
+from django.contrib.auth import get_user_model
+from django.contrib.auth.models import Permission
+
+from kfet.models import Account
+
+User = get_user_model()
+
+
+def get_kfet_generic_user():
+    """
+    Return the user related to the kfet generic account.
+    """
+    return Account.objects.get_generic().user
+
+
+def setup_kfet_generic_user(**kwargs):
+    """
+    First steps of setup of the kfet generic user are done in a migration, as
+    it is more robust against database schema changes.
+    Following steps cannot be done from migration.
+    """
+    generic = get_kfet_generic_user()
+    generic.user_permissions.add(
+        Permission.objects.get(
+            content_type__app_label='kfet',
+            codename='is_team',
+        )
+    )

kfet/migrations/0059_create_generic.py

@@ -0,0 +1,45 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+from kfet.auth import KFET_GENERIC_TRIGRAMME, KFET_GENERIC_USERNAME
+
+
+def setup_kfet_generic_user(apps, schema_editor):
+    """
+    Setup models instances for the kfet generic account.
+
+    Username and trigramme are retrieved from kfet.auth.__init__ module.
+    Other data are registered here.
+
+    See also setup_kfet_generic_user from kfet.auth.utils module.
+    """
+    User = apps.get_model('auth', 'User')
+    CofProfile = apps.get_model('gestioncof', 'CofProfile')
+    Account = apps.get_model('kfet', 'Account')
+
+    user, _ = User.objects.update_or_create(
+        username=KFET_GENERIC_USERNAME,
+        defaults={
+            'first_name': 'Compte générique K-Fêt',
+        },
+    )
+    profile, _ = CofProfile.objects.update_or_create(user=user)
+    account, _ = Account.objects.update_or_create(
+        cofprofile=profile,
+        defaults={
+            'trigramme': KFET_GENERIC_TRIGRAMME,
+        },
+    )
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('kfet', '0058_delete_genericteamtoken'),
+    ]
+
+    operations = [
+        migrations.RunPython(setup_kfet_generic_user),
+    ]

kfet/models.py

@@ -14,6 +14,7 @@ from datetime import date
 import re
 import hashlib
 
+from .auth import KFET_GENERIC_TRIGRAMME
 from .auth.models import GenericTeamToken  # noqa
 
 from .config import kfet_config
@@ -35,6 +36,12 @@ class AccountManager(models.Manager):
         return super().get_queryset().select_related('cofprofile__user',
                                                      'negative')
 
+    def get_generic(self):
+        """
+        Get the kfet generic account instance.
+        """
+        return self.get(trigramme=KFET_GENERIC_TRIGRAMME)
+
 
 class Account(models.Model):
     objects = AccountManager()