On OpenERP 7, I want to add the location of the events in the calendar view (in addition to the date, the name and the name of the responsible of the event). So, I'm editing this file of the "web_calendar" module : "static/src/js/calendar.js".

From this file, I can access to any table of the database. This line display a list of users in the console :

new instance.web.Model('res.users').query(['login']).all().done(
        function(test_table){
            console.log(test_table);
        });

But I can't access to the "calendar.event" table, I get an empty variable.

new instance.web.Model('calendar.event').query(['location']).all().done(
            function(test_table){
                console.log(test_table);
            });

"calendar.event" and its field "location" are available. Otherwise, when I try with a table which doesn't exist, I get 'Object "table.random" doesn't exist'.
I have add some events in my calendar, so I don't think it could be because of an empty database.