Action URLs from CP to a Craft 3 plugin controller

Question

I'm working on my first Craft 3 plugin and want to add some buttons to my plugin's control panel section which post form data to a controller.

My plugin is called 'myplugin', the controller I wish to post to is called 'products' and the method in that controller is 'get-products'. I figured I should therefore create the URL on the forms as

{{ actionUrl('products/get-products') }}

However this yields a 404 error

HTTP 404 – Not Found – yii\web\NotFoundHttpException
Page not found.
↵
Caused by: Invalid Route – yii\base\InvalidRouteException
Unable to resolve the request "https:/local.mydomain.co.uk/index.php?p=admin/actions/products/get-products".
in /Users/pete/projects/myclient/dev/build/vendor/yiisoft/yii2/base/Module.php at line 537

If I call the URL directly by using https://local.mydomain.co.uk/admin/actions/myplugin/products/get-products then it behaves as expected.

Obviously I'm missing some really important bit of knowledge here and would love if someone could help me understand what's going on.

Answer 1

I think you should use {{ actionUrl('myplugin/products/get-products') }}.

But in a form, it's maybe even better/easier to use:

<input type="hidden" name="action" value="myplugin/products/get-products" />

Answer 2

The problem was two-fold and partly related to my plugin requiring POST data.

If I set the URL to myplugin/products/get-products then it hits the correct controller.

I then set the form method to post and added the necessary {{ csrfInput() }} tag to generate the CSRF fields in the form.

Using {{ actionUrl() }} still doesn't work but I figured that's because it creates a GET request.