Calling an action within javascript function w/ ajax

rubyonrails-talk
1

I am trying to call an action within a javscript function using ajax, but I am having some problems. I need the ajax call to return a value and am thinking I can do this using onComplete and Ajax.Request but I am running into some problems. This is the code I am using for the Ajax.Request:

    new Ajax.Request( '/users/username', {       method: 'post',       parameters: { username: $('new_user_username').value},       onComplete: parseResults()     });

I have an action called username in my users controller in which I am taking the username params passed by the Ajax.Request and seeing if it exists in the database. I want to return true/false depending on if it exists or not. But I am having trouble even getting the Ajax.Request to work.

This is some of the output from the console:

Processing UsersController#username (for 192.168.1.105 at 2008-12-13 19:52:39) [POST]   Session ID: BAh7BzoMY3NyZl9pZCIlYmNjM2YxODllZWIwMGM1NDkyMzQ0NjUyODMxODAz ZTUiCmZsYXNoSUM6J0FjdGlvbkNvbnRyb2xsZXI6OkZsYXNoOjpGbGFzaEhh c2h7AAY6CkB1c2VkewA=--d0d5fc597c61c2a295570ee9b118db7ba4285f3f   Parameters: {"username"=>"d", "action"=>"username", "controller"=>"users"}

ActionController::InvalidAuthenticityToken (ActionController::InvalidAuthenticityToken):

Im not sure how to get around this InvalidAuthenticityToken, anyone have any idea whats going on here. Ive been struggling with this for a while and am somewhat new to ajax so I could use some help.

2

Im thinking this needs to be a 'GET' request in order to return a response, but when I change the method to a GET, it calls the show action:

  Parameters: {"username"=>"f", "action"=>"show", "id"=>"username", "controller"=>"users"}

Stumped...

3

Just use remote_function and it will generate the appropriate ajax call for you - this will make your code much less brittle to Rails changes.

http://api.rubyonrails.org/classes/ActionView/Helpers/PrototypeHelper.html

HY