I have the following method in my template file:

function submit_serials(){
    var serials = $('serials').value;
    new Ajax.Request("<?php echo $this->getUrl('*/*/process'); ?>" + '?serials=' + serials, {
        method: 'POST', 
        onComplete: function(transport) {
            div = $('feedback');

in my controller file I have:

public function processAction(){
    $serials = $_POST['serials'];

I'm getting a Request-URI too large error. I understand that there is too much info being stored in the serials variable, but how else can I parse this through to the controller? I read that you should be using the body of the AJAX request but I can't seem to figure out how to do so.

How can I parse the serials in the body of this Ajax request & fetch them from within the controller file?

  • You are trying to send data in GET while using POST request... Send it in POST.
    – Amberta
    Commented Jan 30, 2015 at 13:23
  • If you could elaborate on how to do so, I'd really appreciate it :-)
    – Moose
    Commented Jan 30, 2015 at 13:24

2 Answers 2


You need form param serialize, and send form fields as it as param to ajax request

 new Ajax.Request(url,{
    requestHeaders: {Accept: 'application/json'},
        var response=transport.responseText.evalJSON(true);


If you work with varien form stucture then using form ID you can create Varien form vaidation:

        var MobileLogin = new VarienForm('min-mobile-login', true);
            MobileLogin.submit = function(button, url) {
            if (this.validator.validate()) {
                var form = this.form;
                var oldUrl = form.action;
                if (url) { form.action = url; }
                var e = null;
                try { 

            new Ajax.Request(this.form.action,{
            requestHeaders: {Accept: 'application/json'},
                var response=transport.responseText.evalJSON(true);


        } catch (e) {
                this.form.action = oldUrl;
                if (e) { throw e; }


Here min-mobile-login is id form .Ex <form id="min-mobile-login" ....

And form button type should be submit and it content onclick function and and return false

    <button class="button" type="submit"  
onclick="MobileLogin.submit(this); return false;">Login</button>
  • Thanks a lot for the info. Could you show me how to specify the parameters for the serials variable? Sorry, not very familiar with Ajax at all!
    – Moose
    Commented Jan 30, 2015 at 13:29
  • of course... it will give full solution just hold
    – Amit Bera
    Commented Jan 30, 2015 at 13:30
  • you can also use transport.responseJSON if the backend script sends the Content-type: application/json header Commented Jan 30, 2015 at 19:06


new Ajax.Request('/some_url', {
  method: 'post',
  parameters: {company: 'example', limit: 12}

Use Google more. There are many examples.

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