define default scope to model due to postgres
vietnamese route path for search
style the product result after searching
[b] specify the table of id due to ambigious in join query
add default scope to User due to postgres
little space for product info in search result
no login user can search products
use haml instead of erb for user form
translation for the page
vietnamese locale for route path
migration will fail if deploy to new instance because there is no active admin
create setting for User model
just show Following Product when user login