(Symfony 4) How to implement a constants class

Question

I'm trying to have constants everywhere in my code so I don't have to just stick numbers, I know that's bad practice.

So in my root folder I put a class constants, like this:

namespace App;

class Constants{

    public const FREE_TIER = 0;

}

So I include the "use App\Constants;" in my repository class.

Here is the function I try to access my constants class in:

use App\Constants; /* earlier on */ 

/**
 * @param User $user
 * @return array
 */
public function countFreeTiers() : array
{
    $qb = $this->createQueryBuilder('t');
    $qb->select('COUNT(t.tierNumber)')
       ->where('t.tierNumber = :freeTier')
       ->groupBy('t.tierNumber')
       ->orderBy('t.tierNumber', 'ASC')
        ->setParameter('freeTier', Constants::FREE_TIER /* error here */)
       ->setParameter('true', true);

    $query = $qb->getQuery();
    return $query->getResult();
}

This is the error I get:

Attempted to load class "Constants" from namespace "App".
Did you forget a "use" statement for another namespace?

Am I not allowed to just use the "App" namespace?

When you say "root folder" do you mean under the src directory? — Cerad, Jan 15 '19 at 21:17
Hi Cerad, no it is outside the src directory. Literally the root folder of the project. — Brent Heigold, Jan 15 '19 at 22:32
Hi Cerad, I see what you are getting at. Moving the Constants.php to inside the src folder fixed it. Thank you, much appreciated. — Brent Heigold, Jan 15 '19 at 22:36
@revengeance As of 7.1, both public and private constants are supported. So while I agree that public is redundant it does help to make things clear. — Cerad, Jan 16 '19 at 13:31
@Cerad Didn't actually know this, as I haven't yet migrated to 7.1, thanks. — revengeance, Jan 16 '19 at 14:10

score 1 · Accepted Answer · answered Jan 15 '19 at 22:39

This is cerad's solution, not mine.

My problem was that my Constants.php was in the root folder of the project.

I had to move the Constants.php file to inside the src folder, so putting it at the root of src (as opposed to the root of the project) fixed it.

score 0 · Answer 2 · answered Jan 16 '19 at 02:53

0

You can try to put the class file into 'src/Utilities' and symfony will auto load it.

answered Jan 16 '19 at 02:53

AntmadDG

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(Symfony 4) How to implement a constants class

2 Answers2