'No base path provided' Error in Mezzio Skeleton

Questions Mezzio
1

Hi,

When I try to use <?= $this->basePath();?> in a template in mezzio, I get the ‘No base path provided’ error:

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I am using laminas view, and this is a basic install of the mezzio skeleton.

Should this work?
Installation steps:

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Composer.json

{
	"name" : "mezzio/mezzio-skeleton",
	"description" : "Laminas mezzio skeleton. Begin developing PSR-15 middleware applications in seconds!",
	"type" : "project",
	"license" : "BSD-3-Clause",
	"keywords" : [
		"laminas",
		"mezzio",
		"skeleton",
		"middleware",
		"psr",
		"psr-7",
		"psr-11",
		"psr-15"
	],
	"homepage" : "https://mezzio.dev",
	"support" : {
		"docs" : "https://docs.mezzio.dev/mezzio/",
		"issues" : "https://github.com/mezzio/mezzio-skeleton/issues",
		"source" : "https://github.com/mezzio/mezzio-skeleton",
		"rss" : "https://github.com/mezzio/mezzio-skeleton/releases.atom",
		"chat" : "https://laminas.dev/chat",
		"forum" : "https://discourse.laminas.dev"
	},
	"config" : {
		"sort-packages" : true
	},
	"extra" : {
		"laminas" : {
			"component-whitelist" : [
				"mezzio/mezzio",
				"mezzio/mezzio-helpers",
				"mezzio/mezzio-router",
				"laminas/laminas-httphandlerrunner",
				"mezzio/mezzio-fastroute",
				"mezzio/mezzio-laminasviewrenderer"
			]
		}
	},
	"require" : {
		"php" : "^7.3 || ~8.0.0 || ~8.1.0",
		"composer/package-versions-deprecated" : "^1.10.99",
		"laminas/laminas-component-installer" : "^2.5.0",
		"laminas/laminas-config-aggregator" : "^1.5.0",
		"laminas/laminas-diactoros" : "^2.6.0",
		"laminas/laminas-stdlib" : "^3.3.1",
		"laminas/laminas-zendframework-bridge" : "^1.2.0",
		"mezzio/mezzio" : "^3.5.0",
		"mezzio/mezzio-helpers" : "^5.6.0",
		"laminas/laminas-servicemanager" : "^3.4",
		"mezzio/mezzio-fastroute" : "^3.0.3",
		"mezzio/mezzio-laminasviewrenderer" : "^2.2"
	},
	"require-dev" : {
		"laminas/laminas-development-mode" : "^3.3.0",
		"mezzio/mezzio-tooling" : "^1.4.0",
		"phpspec/prophecy" : "^1.10.3",
		"phpspec/prophecy-phpunit" : "^2.0",
		"phpunit/phpunit" : "^9.4.1",
		"roave/security-advisories" : "dev-master",
		"filp/whoops" : "^2.7.1"
	},
	"autoload" : {
		"psr-4" : {
			"App\\" : "src/App/src/"
		}
	},
	"autoload-dev" : {
		"psr-4" : {
			"AppTest\\" : "test/AppTest/"
		}
	},
	"scripts" : {
		"post-create-project-cmd" : "@development-enable",
		"development-disable" : "laminas-development-mode disable",
		"development-enable" : "laminas-development-mode enable",
		"development-status" : "laminas-development-mode status",
		"mezzio" : "mezzio --ansi",
		"check" : [
			"@cs-check",
			"@test"
		],
		"clear-config-cache" : "php bin/clear-config-cache.php",
		"cs-check" : "phpcs",
		"cs-fix" : "phpcbf",
		"serve" : "php -S 0.0.0.0:8080 -t public/",
		"test" : "phpunit --colors=always",
		"test-coverage" : "phpunit --colors=always --coverage-clover clover.xml"
	}
}
2

The helper is not automatically configured in a Mezzio application, only in a laminas-mvc based application:

If you’re running a laminas-mvc application, basePath() will point to the public folder of the application’s root.

See: Redirecting...

There are different options to solve the problem:

  • if you already use the basePath support of the Mezzio helpers, then you can get the base path from the url helper and set it manually to the basePath helper
  • create a factory for the basePath helper
  • create a feature request on the repository of mezzio-laminasviewrenderer
    (I think a good idea is to create a factory for the basePath helper in laminas-view, which is then used in mezzio-laminasviewrenderer.)
3

Thanks for the feedback.
I had implemented <?php echo $this->url('home')?> along with the los/basepath middleware which is probably a terrible way of doing it, but it meets my needs so far,

I’ll look into the factory for the basePath helper. It should be cleaner for the application overall.

4

For what its worth, this is my factory that sets basePath.
As I am using los/basepath , I use it to set the basePath in the factory

<?php
namespace App\Factory;

use Interop\Container\ContainerInterface;
use Laminas\View\Helper\BasePath;

class BasePathFactory
{
    public function __invoke(ContainerInterface $container, $name, array $options = null): BasePath
    {
        $helper = new \Laminas\View\Helper\BasePath();
        $basePath = $container->get('config')['los_basepath'];
        
        $helper->setBasePath($basePath);
        
        return $helper;
    }
}

And in the dependencies.global.php, include the factory in the view_helpers:

'view_helpers' => [
        'factories' => [
            \Laminas\View\Helper\BasePath::class => \App\Factory\BasePathFactory::class
        ]
    ]
5

Do you use the los/basepath middleware only for the basePath view helper or do you really run your application in a subdirectory?
If your application is not in a subdirectory, try to omit the los/basepath middleware and get the base path from the Mezzio UrlHelper.

6

The entire application, while in development, is run in a sub-directory, so there was a need for los/basepath