from official grocery CRUD web, they teach me set_relation like that:
set_relation tutorial
The tutorial show how to display database which the main table (set_table) is "employees". But how do i display when my set_table is offices, so then one of my column consist of list of employees which work in the specific office.
Thanks.
In this case you will use callback_column and put inside the login to query the list of employees, loop through then , generating the HTML and returning it in the callback.
Take a look at the callback_column documentation http://www.grocerycrud.com/documentation/options_functions/callback_column