[#368] Add num_followers after validating the group_dict against a …

…schema.

This makes sure that is still there and is necessary because we require a schema in controllers.group.history but there is no `num_followers` field in logic.schema.default_group_schema.

ckan/logic/action/get.py

@@ -845,12 +845,12 @@ def _group_or_org_show(context, data_dict, is_org=False):
     except AttributeError:
         schema = group_plugin.db_to_form_schema()
 
+    if schema:
+        group_dict, errors = _validate(group_dict, schema, context=context)
+
     group_dict['num_followers'] = logic.get_action('group_follower_count')(
             {'model': model, 'session': model.Session},
             {'id': group_dict['id']})
-
-    if schema:
-        group_dict, errors = _validate(group_dict, schema, context=context)
     return group_dict