Empêche d'assigner un respo non membre du club

Dans l'interface admin

gestioncof/admin.py

@@ -4,6 +4,7 @@ from __future__ import division
 from __future__ import print_function
 from __future__ import unicode_literals
 
+from django import forms
 from django.contrib import admin
 from gestioncof.models import SurveyQuestionAnswer, SurveyQuestion, \
     CofProfile, EventOption, EventOptionChoice, Event, Club, CustomMail, \
@@ -232,6 +233,25 @@ class PetitCoursDemandeAdmin(admin.ModelAdmin):
 class CustomMailAdmin(admin.ModelAdmin):
     search_fields = ('shortname', 'title')
 
+
+class ClubAdminForm(forms.ModelForm):
+    def clean(self):
+        cleaned_data = super(ClubAdminForm, self).clean()
+        respos = cleaned_data.get('respos')
+        members = cleaned_data.get('membres')
+        for respo in respos.all():
+            if respo not in members:
+                raise forms.ValidationError(
+                    "Erreur : le respo %s n'est pas membre du club."
+                    % respo.get_full_name())
+        return cleaned_data
+
+
+class ClubAdmin(admin.ModelAdmin):
+    list_display = ['name']
+    form = ClubAdminForm
+
+
 admin.site.register(Survey, SurveyAdmin)
 admin.site.register(SurveyQuestion, SurveyQuestionAdmin)
 admin.site.register(Event, EventAdmin)
@@ -239,7 +259,7 @@ admin.site.register(EventOption, EventOptionAdmin)
 admin.site.unregister(User)
 admin.site.register(User, UserProfileAdmin)
 admin.site.register(CofProfile)
-admin.site.register(Club)
+admin.site.register(Club, ClubAdmin)
 admin.site.register(CustomMail)
 admin.site.register(PetitCoursSubject)
 admin.site.register(PetitCoursAbility, PetitCoursAbilityAdmin)