Sending a JSON string as a parameter to an action

I have a button on my Ruby on Rails view file.

Firstly when the button is clicked an Ajax call is made which in response gives a JSON string. So far I have accomplished this task.

Here is where I am stuck: The button also redirects me to another action of the same controll开发者_如何学运维er. Now I want to send the JSON string received by JavaScript as a parameter to that action.

Is there any way around this?

Your ajax call should look something like this:

... doing stuff before ...

$.ajax(
  url:'url-to-script',
  success: function(data) {
    var json = JSON.parse(data);
    $('#hidden-field').val(json); // set a hidden field in your form
    $('#from-id').submit();
  }
);

$('#submit-button').attr('disabled', 'true'); // disable the button
// set some spinny animation to notify the user that you are waiting.
// time out after a while if you don't get a response

... doing stuff after ...

Basically we fire off the ajax event, disable the button and notify the user you are waiting. When the call returns, your callback method submits the form to rails. You can also set a time out for the ajax call and let the user resubmit if necessary. You can handle the error case however you like.