CakePHP 4.0 Unable to use custom component in custom plugin

Plugins
1

I’m not sure if I’m doing this correctly. I want to load a component from a plugin in the AppController (or any controller). I believe the correct plugin syntax is simply $this->loadComponent('Foo.Foo') for a Foo plugin with a FooComponent.

Here is my plugin directory structure:

├── Foo
│ ├── README.md
│ ├── composer.json
│ ├── phpunit.xml.dist
│ ├── src
│ │ ├── Controller
│ │ │ ├── AppController.php
│ │ │ └── Component
│ │ │ └── FooComponent.php
│ │ └── Plugin.php
│ ├── tests
│ │ ├── TestCase
│ │ │ └── Controller
│ │ │ └── Component
│ │ │ └── FooComponentTest.php
│ │ └── bootstrap.php
│ └── webroot

When attempting to call an endpoint with a controller that inherits from AppController, I receive the following serialized error:

{
“message”: “Component class FooComponent could not be found.”,
“url”: “/controller-that-uses-app-controller”,
“code”: 500,
“file”: “path/to/project/vendor/cakephp/cakephp/src/Controller/ComponentRegistry.php”,
“line”: 111
}

FooComponent:

namespace Foo\Controller\Component;

use Cake\Controller\Component;
use Cake\Controller\ComponentRegistry;

/**

  • Foo component
    /
    class FooComponent extends Component
    {
    /    *
    • Default configuration.
    • @var array
      */
      protected $_defaultConfig = [];
      }

Foo plugin composer.json psr-4 directive:

"autoload": {
    "psr-4": {
        "Foo\\": "src/"
    }
}

First party Authorization and Authentication components/plugins work fine.

Im guessing it’s a problem with autoloading/namespaces/directory structure. For now, I’ve removed the plugins and just moved everything back into the main application. After refactoring namespaces, everything is working again for now.

2

Did you do a composer dumpautoload after changing the composer.json?

3

Thanks for the reply. I didn’t. I’ll refactor the feature into a plugin and try again when done.

4

That seems to have fixed it. I thought psr4 was automatic?

5

Composer requires running an appropriate command that trigger it to update its autoload file which establishes known namespace to filepath relationships. After that referencing (sub)items within known namespace-filepath-relationships works automatically.

Performance being a huge reason for that behavior (it would kill performance reevaluating everything on each request).

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