Question

This is the jQuery, both the game_id and the $(this).val() are integers

    /* AJAX call: save to DB input name=#game_id# value=#game_rating */
    $.post("game_rating_submit.cfm", {
        id: game_id,
        rating: $(this).val()
     }, 
     function(data) {
        alert('data: ' + data);
    });

This is the coldfusion part that’s failing:

<cfif NOT IsNumeric("form.rating")>
    <cfset variables.error = 'Invalid rating value #form.rating#.' >
</cfif>
<cfoutput>#variables.error#</cfoutput>

For some reason form.rating is not numeric?

Answer 1

When quoted “form.rating” is the string “form.rating”, if you want the value try…

 <cfif NOT IsNumeric(form.rating)>
     <cfset variables.error = 'Invalid rating value #form.rating#.' >
 </cfif>
 <cfoutput>#variables.error#</cfoutput>