Craft CMS plugin with AJAX gives 404 error

Question

I have created a small craft cms plugin to pull some information from the DB, and everytime I execute the plugin I get a 404.

Here is the controller

namespace Craft;

class UserExists_UserControllerController extends BaseController
{
    public function actionGetUser()
    {
        $this->returnJson($response);
    }
}

And this is the jquery:

$.ajax({
    url: "{{ url("actions/userexists/usercontroller/getUser") }}",
    dataType: "json",
    success: function(data){
        console.log(data)
    }
});

Answer 1

If you aren't currently logged in, you're apt to be running up against the "anonymous access" limitation.

This section of the Controller documentation should help:

By default, controller actions are only accessible to logged-in users. You can override that by changing the protected $allowAnonymous property on your controller class. To allow anonymous access to all of your controller’s actions, set it to true:

<?php
namespace Craft;

class CocktailRecipes_IngredientsController extends BaseController
{
  protected $allowAnonymous = true;

  // Your action methods
}

Answer 2

Two things to try:

1) Try to use the Craft.getActionUrl() to get the URL of the action, as per the documentation for Linking Directly to Controller Actions:

2) Make sure there is no $this->requireLogin() or $this->requirePostRequest() in your controller

Theoretically there could be something wrong in the routing as well, as I have also experienced that a plugin runs perfectly, but because the response was not set to reply or re-route to somewhere meaningful, I got a 404 when accessing the controller via URL, and not from the control panel. In that case, this answered question could be helpful: Controller action works but still gives 404.

Answer 3

If you are still not having any luck, If none of the above work, check out this thread that shows how to call an ajax function from a controller.