Use media str method for admin

media/admin.py

@@ -18,7 +18,7 @@ class AuteurAdmin(VersionAdmin):
 
 
 class MediaAdmin(VersionAdmin):
-    list_display = ('full_name', 'authors_list', 'side_identifier', 'isbn',
+    list_display = ('__str__', 'authors_list', 'side_identifier', 'isbn',
                     'external_link')
     search_fields = ('title', 'authors__nom', 'side_identifier', 'subtitle',
                      'isbn')
@@ -26,14 +26,6 @@ class MediaAdmin(VersionAdmin):
     date_hierarchy = 'publish_date'
     form = MediaAdminForm
 
-    def full_name(self, obj):
-        if obj.subtitle:
-            return "{} : {}".format(obj.title, obj.subtitle)
-        else:
-            return obj.title
-
-    full_name.short_description = _('name')
-
     def authors_list(self, obj):
         return ", ".join([a.nom for a in obj.authors.all()])
 

media/models.py

@@ -63,8 +63,10 @@ class Media(models.Model):
     )
 
     def __str__(self):
-        return str(self.title) + ' - ' + str(self.subtitle) \
-               + ' - ' + str(self.authors.all().first())
+        if self.subtitle:
+            return "{} : {}".format(self.title, self.subtitle)
+        else:
+            return self.title
 
     class Meta:
         verbose_name = _("medium")