Merge branch 'Aufinal/fix_87' into 'k-fet'

Fixes #87

Le field `groups` de `UserGroupForm` accepte les valeurs vides, ce qui permet la destitution de K-Fêt.

See merge request !157

kfet/forms.py

@@ -1,21 +1,17 @@
 # -*- coding: utf-8 -*-
 
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
-
 from decimal import Decimal
 from django import forms
 from django.core.exceptions import ValidationError
 from django.core.validators import MinLengthValidator
 from django.contrib.auth.models import User, Group, Permission
 from django.contrib.contenttypes.models import ContentType
-from django.forms import modelformset_factory, inlineformset_factory
-from django.forms.models import BaseInlineFormSet
+from django.forms import modelformset_factory
 from django.utils import timezone
-from kfet.models import (Account, Checkout, Article, OperationGroup, Operation,
+from kfet.models import (
+    Account, Checkout, Article, OperationGroup, Operation,
     CheckoutStatement, ArticleCategory, Settings, AccountNegative, Transfer,
-    TransferGroup, Supplier, Inventory, InventoryArticle)
+    TransferGroup, Supplier)
 from gestioncof.models import CofProfile
 
 # -----
@@ -131,7 +127,16 @@ class UserRestrictTeamForm(UserForm):
 
 class UserGroupForm(forms.ModelForm):
     groups = forms.ModelMultipleChoiceField(
-            Group.objects.filter(name__icontains='K-Fêt'))
+            Group.objects.filter(name__icontains='K-Fêt'),
+            required=False)
+
+    def clean_groups(self):
+        groups = self.cleaned_data.get('groups')
+        # Si aucun groupe, on le dénomme
+        if not groups:
+            groups = self.instance.groups.exclude(name__icontains='K-Fêt')
+        return groups
+
     class Meta:
         model  = User
         fields = ['groups']