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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