Psr-4 deprecated Notice in laravel

Question

I am facing the below error on running the composer dumpautoload .

Deprecation Notice: Class App\Support\Dataviewer located in ./app/Traits/DataViewerTraits.php does not comply with psr-4 autoloading standard. It will not autoload anymore in Composer v2.0. in phar:///usr/local/bin/composer/src/Composer/Autoload/ClassMapGenerator.php:201

Class App\Support\Dataviewer is where I am applying some logic for filters.

in my composer.json

"autoload": {
        "psr-4": {
            "App\\": "app/",
            "Support\\": "app/Support",
            "Traits\\": "app/Traits"
        },
        "classmap": [
            "database/seeds",
            "database/factories",
            "app/Models"
        ]
    },

what am I doing wrong here?

Answer 1

Ok was looking for the answer all over the place and stumbed upon the below issue link on github for composer: https://github.com/composer/composer/issues/8465

the second last comment is what was needed for me to do. instead of adding the files in psr-4 section , I added it to classmap section, and voila: its done :D

Answer 2

First you're setting all inside app/ as App\\ namespace and then setting app/Support and app\Traits with a different namespace.

You should either move Support and Traits to the root folder or remove those namespaces from composer.json