Model#search: refactor searching for attributes.

app/models/favorite_group.rb

@@ -47,6 +47,7 @@ class FavoriteGroup < ApplicationRecord
 
     def search(params)
       q = super
+      q = q.search_attributes(params, :is_public)
 
       if params[:creator_id].present?
         user = User.find(params[:creator_id])
@@ -65,8 +66,6 @@ class FavoriteGroup < ApplicationRecord
         q = q.name_matches(params[:name_matches])
       end
 
-      q = q.attribute_matches(:is_public, params[:is_public])
-
       q.apply_default_order(params)
     end
   end