Ruby on Rails

1. The following javascript is being defined in myapp/public/
javascripts/application.js

jQuery(function($) {
// when the #search field changes
$("#category").change(function() {
// make a POST call and replace the content
$.post(<%= category_sub_categories_path %>, function(data) {
$("#results").html(data);
});
});
})

2. this javascript is being applied to the myapp/app/views/parts/
_form.html.erb partial template

My question is, if there is a rails variable, @categories in the
partial template, I need to pass the @categories.id value to the
javascript from there.
Would this work?

If somebody understands this and could comment, kindly share your
input.
Thank you

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