réaffectation des services inactifs impossible

services/admin.py

@@ -16,6 +16,7 @@ from django.core.cache import cache
 from django.contrib.humanize.templatetags.humanize import naturaltime
 from django.contrib.contenttypes.models import ContentType
 from django.http import HttpResponseRedirect
+from django.core.exceptions import ValidationError
 
 from djgeojson.views import GeoJSONLayerView
 from urllib.parse import urlencode
@@ -332,6 +333,17 @@ class ServicePortInline(PortInline):
     readonly_fields = ('switch', 'port', 'up',)
 
 
+
+### Forms
+
+class ServiceForm(ModelForm):
+    def clean_adhesion(self):
+        if self.instance.adhesion.pk != self.cleaned_data['adhesion'].pk \
+                and not self.instance.is_active():
+            raise ValidationError('Il n’est pas possible de ré-affecter à un autre adhérent un service inactif (i.e. sans allocations actives).')
+        return self.cleaned_data['adhesion']
+
+
 ### ModelAdmin
 
 class ServiceAdmin(admin.ModelAdmin):
@@ -346,6 +358,7 @@ class ServiceAdmin(admin.ModelAdmin):
     fields = ('adhesion', 'service_type', 'label', 'notes', 'loan_equipment', 'get_contribution_link', 'is_active',)
     readonly_fields = ('get_contribution_link', 'is_active',)
     raw_id_fields = ('adhesion',)
+    form = ServiceForm
 
     def save_model(self, request, srv, form, change):
         if 'adhesion' in form.changed_data: