javascript - Ajax ignoring URL

I try to make an ajax request through JQuery triggering an onClick event, but when it sends the AJAX request I receive:

PATCH http://localhost:8000/courses 405 (Method Not Allowed) (Current page) Because it doesn't get the URL with the id

HTML

@foreach ($courses as $course)
    <tr>
      <td>{{ Form::select('year', $years, ['class' => 'form-control'], [ 'placeholder' => $course->academicYear]) }}</td>
      <td>{{ Form::select('subject', $subjects, ['class' => 'form-control'], [ 'placeholder' => $course->subject]) }}</td>
      <td>
        <a href="" id="saveCourse" class="btn btn-success pull-left">Save</a>
        <input type="hidden" id="idCourse" value="{{ $course->id }}">
      (...)

JQUERY + AJAX

$('#saveCourse').click(function(e){
        e.preventDefault();
        var id = $('#idCourse').val();

        // Ignore this logic
        var values = {year: "", subject:"", id: id};
        var parameters = ['year', 'subject'];
        var i = 0;
        $('td > select option:selected').each(function() {
            values[parameters[i]] = $(this).text();
            i++;
        });

        // Ajax request
        $.ajax({
            type: 'patch',

            // Appending the course id here not working, 
            // but if i put anything else like /blabla/ + id ajax doesn't ignore it...

            url:  '/courses/' + id,
            headers: {'X-CSRF-Token': csrf_token},
            dataType: 'json',
            data: values,

            success: function (response) {
                console.log("SUCCESS: " + response);
            },
            error: function (reject) {
                if( reject.status === 422 ) {
                    $("#error").text("Los datos dados no cumplen el formato requerido.");
                }
            }
        });
    });

WEB.PHP

/* -----COURSE_ROUTES------ */
    Route::resource('courses', 'CourseController')->except([
        'create', 'edit'
    ]);

ROUTES

Found a GitHub issue with the same problem https://github.com/jquery/jquery/issues/3944

Solution:

PUT and PATCH are request methods. An HTTP error of 405, which you get means that the server knows the request method, but the service does not support it. Read more here: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/405

Solution:

not sure if matters but try PATCH instead of patch

type: 'PATCH',

Solution:

I forgot to put this condition at the start of the update method in the controller... Now it works!

if(request()->ajax()) { ... }

Solution:

As mentioned below the 405 (METHOD NOT ALLOWED) basically means you're ajax request method PATCH is not allowed for the specific resource on the server.

If you using a routing library you can go their docs and search how to change this behavior. A route can accept one or multiple request methods, I assume that the Route::resource create a route with method POST by default, which explains that the ajax request works in POST type.