set default helpers required to 1 for rooms, add more info in room admin views

shiftregister/app/admin.py

@@ -13,15 +13,24 @@ from .models import Helper, LoginToken, Message, Room, Shift, ShiftRegistration
 logger = logging.getLogger(__name__)
 
 
+class ShiftInline(admin.TabularInline):
+    model = Shift
+    fields = ("deleted", "start_at", "required_helpers")
+
+
 @admin.register(Room)
 class RoomAdmin(admin.ModelAdmin):
-    list_display = ("name", "description_length")
+    list_display = ("name", "description_length", "shift_count")
+    inlines = [ShiftInline]
 
     def description_length(self, object):
         if object.description:
             return len(object.description)
         return 0
 
+    def shift_count(self, object):
+        return object.shift_set.filter(deleted=False).count()
+
 
 @admin.register(Shift)
 class ShiftAdmin(admin.ModelAdmin):

shiftregister/app/models.py

@@ -16,7 +16,7 @@ global_preferences = global_preferences_registry.manager()
 
 class Room(models.Model):
     name = models.CharField(max_length=200, primary_key=True)
-    required_helpers = models.IntegerField()
+    required_helpers = models.IntegerField(default=1)
     meeting_location = models.TextField(default="Infopoint")
     description = models.TextField(blank=True, default="")
     send_reminders = models.BooleanField(default=True)