Exception 'yii\base\InvalidParamException' with message 'Invalid path alias: @modules/controllers'

[eriweb]

When trying to use the ./craft command I get the this error on a freshly installed RC1 system.

Exception 'yii\base\InvalidParamException' with message 'Invalid path alias: @modules/controllers'

in /home/user/source/vendor/yiisoft/yii2/BaseYii.php:154

Stack trace:
#0 /home/user/source/vendor/yiisoft/yii2/base/Module.php(257): yii\BaseYii::getAlias('@modules/contro...')
#1 /home/user/source/vendor/yiisoft/yii2/console/controllers/HelpController.php(250): yii\base\Module->getControllerPath()
#2 /home/user/source/vendor/yiisoft/yii2/console/controllers/HelpController.php(245): yii\console\controllers\HelpController->getModuleCommands(Object(modules\Module))
#3 /home/user/source/vendor/yiisoft/yii2/console/controllers/HelpController.php(179): yii\console\controllers\HelpController->getModuleCommands(Object(craft\console\Application))
#4 /home/user/source/vendor/yiisoft/yii2/console/controllers/HelpController.php(191): yii\console\controllers\HelpController->getCommands()
#5 /home/user/source/vendor/yiisoft/yii2/console/controllers/HelpController.php(286): yii\console\controllers\HelpController->getCommandDescriptions()
#6 /home/user/source/vendor/yiisoft/yii2/console/controllers/HelpController.php(67): yii\console\controllers\HelpController->getDefaultHelp()
#7 [internal function]: yii\console\controllers\HelpController->actionIndex(NULL)
#8 /home/user/source/vendor/yiisoft/yii2/base/InlineAction.php(57): call_user_func_array(Array, Array)
#9 /home/user/source/vendor/yiisoft/yii2/base/Controller.php(157): yii\base\InlineAction->runWithParams(Array)
#10 /home/user/source/vendor/yiisoft/yii2/console/Controller.php(135): yii\base\Controller->runAction('', Array)
#11 /home/user/source/vendor/yiisoft/yii2/base/Module.php(528): yii\console\Controller->runAction('', Array)
#12 /home/user/source/vendor/yiisoft/yii2/console/Application.php(180): yii\base\Module->runAction('', Array)
#13 /home/user/source/vendor/yiisoft/yii2/console/Application.php(147): yii\console\Application->runAction('', Array)
#14 /home/user/source/vendor/yiisoft/yii2/base/Application.php(386): yii\console\Application->handleRequest(Object(craft\console\Request))
#15 /home/user/source/craft(22): yii\base\Application->run()
#16 {main}

If i return an empty array in config/app.php instead of the default it seems to work

return [];

Instead of:

return [
    'modules' => [
        'my-module' => \modules\Module::class,
    ],
    //'bootstrap' => ['my-module'],
];

[brandonkelly]

Thanks! Fixed now.

[swthate]

I am getting the same Exception when trying to run ./craft with Craft 3.1.31:

Exception 'yii\base\InvalidArgumentException' with message 'Invalid path alias: @modules/vetscripts/controllers'

in /Users/steven/Code/vetscripts/vendor/yiisoft/yii2/BaseYii.php:154

Stack trace:
#0 /Users/steven/Code/vetscripts/vendor/yiisoft/yii2/base/Module.php(257): yii\BaseYii::getAlias('@modules/vetscr...')
#1 /Users/steven/Code/vetscripts/vendor/yiisoft/yii2/console/controllers/HelpController.php(246): yii\base\Module->getControllerPath()
#2 /Users/steven/Code/vetscripts/vendor/yiisoft/yii2/console/controllers/HelpController.php(241): yii\console\controllers\HelpController->getModuleCommands(Object(modules\vetscripts\VetScripts))
#3 /Users/steven/Code/vetscripts/vendor/yiisoft/yii2/console/controllers/HelpController.php(175): yii\console\controllers\HelpController->getModuleCommands(Object(craft\console\Application))
#4 /Users/steven/Code/vetscripts/vendor/yiisoft/yii2/console/controllers/HelpController.php(187): yii\console\controllers\HelpController->getCommands()
#5 /Users/steven/Code/vetscripts/vendor/yiisoft/yii2/console/controllers/HelpController.php(293): yii\console\controllers\HelpController->getCommandDescriptions()
#6 /Users/steven/Code/vetscripts/vendor/yiisoft/yii2/console/controllers/HelpController.php(67): yii\console\controllers\HelpController->getDefaultHelp()
#7 [internal function]: yii\console\controllers\HelpController->actionIndex(NULL)
#8 /Users/steven/Code/vetscripts/vendor/yiisoft/yii2/base/InlineAction.php(57): call_user_func_array(Array, Array)
#9 /Users/steven/Code/vetscripts/vendor/yiisoft/yii2/base/Controller.php(157): yii\base\InlineAction->runWithParams(Array)
#10 /Users/steven/Code/vetscripts/vendor/yiisoft/yii2/console/Controller.php(148): yii\base\Controller->runAction('', Array)
#11 /Users/steven/Code/vetscripts/vendor/yiisoft/yii2/base/Module.php(528): yii\console\Controller->runAction('', Array)
#12 /Users/steven/Code/vetscripts/vendor/yiisoft/yii2/console/Application.php(180): yii\base\Module->runAction('', Array)
#13 /Users/steven/Code/vetscripts/vendor/craftcms/cms/src/console/Application.php(93): yii\console\Application->runAction('', Array)
#14 /Users/steven/Code/vetscripts/vendor/yiisoft/yii2/console/Application.php(147): craft\console\Application->runAction('', Array)
#15 /Users/steven/Code/vetscripts/vendor/yiisoft/yii2/base/Application.php(386): yii\console\Application->handleRequest(Object(craft\console\Request))
#16 /Users/steven/Code/vetscripts/craft(22): yii\base\Application->run()
#17 {main}

I have a custom Module defined in config/app.php here:

use modules\vetscripts\VetScripts;

return [
    'modules' => [
        'vetscripts' => VetScripts::class
    ],
    'bootstrap' => ['vetscripts'],
];

[swthate]

I changed

Craft::setAlias('@vetscripts', __DIR__);

to

Craft::setAlias('@modules/vetscripts', $this->getBasePath());
$this->controllerNamespace = 'modules\vetscripts\controllers';

and now it works! Not sure why, but it's working.

Oops!

[bzin]

@swthate I imagine that this can occur when you do not have the alias set on your Module constructor

Craft::setAlias('@modules/vetscripts', $this->getBasePath());

At least I was having the same issue and this worked for me. I normally use https://pluginfactory.io to generate my modules. This avoids me a lot of trouble.