laravel 4 trait autoloading in models

问题

OK, I am struggling for over 2 hours now...

It must be one of the "oh god, it was that obvious" times where you are so tired and you cannot see the solution...

I want to extend the eloquentmodel to include a trait.

so my class looks like

<?php 
class Note extends Eloquent{
  use \Admin\GreatTrait;

  ...
}

and I created the app/Traits/Admin directory structure and there I created the file named GreatTrait.php with the following contents:

<?php namespace Admin;

trait GreatTrait{
  ...
}

and of cource I edited the start/global.php to include the dir to the ClassLoader like so

ClassLoader::addDirectories(array(
    app_path().'/commands',
    ... more ...
    app_path().'/traits',
    app_path().'/traits/Admin',
));

and I get the following error...

Symfony \ Component \ Debug \ Exception \ FatalErrorException

Trait 'Admin\GreatTrait' not found

Anything to suggest?

回答1:

Following your code, i made it work with next changes:

1. Include in composer.json this:

   "autoload": {
       "classmap": [
           "app/traits"
       ] 
   }

2. Include in model after class declaration (just trait name, without directory):

   php 
   class Note extends Eloquent {
       use \GreatTrait;
       ...
   }
   ?>

回答2:

I had some issues with autoloading in global.php, you can do the same using copmposer.json:

Add the path to autoload array in composer.json

"autoload": {
                "classmap": [
                        "app/traits"
                ]
        },

Run composer dump-autoload

In app/traits path you should have the admin folder app/traits/admin with a class setting up the namespace Admin.

<?php
namespace Admin
class GreatTrait { ... }

Then you can use

<?php 
use \Admin\GreatTrait;
class Note extends Eloquent{

  ...
}

来源：https://stackoverflow.com/questions/22103143/laravel-4-trait-autoloading-in-models