Ruby on Rails

I have a model let's say Student and I want to edit a row in the table
name students through Ajax after clicking a button, what is the correct
way to do this? Also, please note I want to edit value inside one column
followers

Here is the js code:

$(document).ready(function(){
$('.clap').click(function(){
var dataString = "student[followers]=5";
$.ajax({
type: "POST",
url: "/students/",
data: dataString,
success: function() {
window.alert('success');
}
});
});
});

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