refactor by_username_or_id

app/models/user.rb

@@ -199,11 +199,7 @@ class User < ActiveRecord::Base
     end
 
     def by_username_or_id(name_or_id)
-      if (name_or_id.is_a?(Integer))
-        User.find_by_id(name_or_id)
-      else
-        User.find_by_username(name_or_id)
-      end
+      where('username = ? OR id = ?', name_or_id, name_or_id).first
     end
 
     def build_user(attrs = {}, options= {})

lib/api/helpers.rb

@@ -11,11 +11,7 @@ module API
       # If the sudo is the current user do nothing
       if (identifier && !(@current_user.id == identifier || @current_user.username == identifier))
         render_api_error!('403 Forbidden: Must be admin to use sudo', 403) unless @current_user.is_admin?
-        begin
         @current_user = User.by_username_or_id(identifier)
-        rescue => ex
-          not_found!("No user id or username for: #{identifier}")
-        end
         not_found!("No user id or username for: #{identifier}") if @current_user.nil?
       end
       @current_user