Laravel 5.7: A facade root has not been set

Question

I'm trying to get sitewide global settings from the database and use those settings in my controllers.

In order to do this I've created a custom global.php file under config directory.
Defined key=>value pairs.
Tried to get values using DB::table(....) facade.

But it returns this error:

A facade root has not been set .

I cannot get past beyond this.

config.php file as follows:

use Illuminate\Support\Facades\DB;

return [ 

    'image_resize' => DB::table('settings')->where('id', 1)->value('image_resize'),
    'popup' => DB::table('settings')->where('id', 1)->value('popup'),
    'site_on' => DB::table('settings')->where('id', 1)->value('site_on')

];

Answer 1

You can use it

use Illuminate\Support\Facades\Config;

class AppServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
        //
    }

    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
        Config::set('global', [
            'image_resize' => DB::table('settings')->where('id', 1)->value('image_resize'),
            'popup' => DB::table('settings')->where('id', 1)->value('popup'),
            'site_on' => DB::table('settings')->where('id', 1)->value('site_on')
        ]);
    }

Then in controller you can use config('global.site_on')

Also you can use one query not three

public function register()
{
    $setting = DB::table('settings')
        ->where('id', 1)
        ->first(['popup', 'image_resize', 'site_on']);
    Config::set('global', [
        'image_resize' => $setting->image_resize,
        'popup' => $setting->popup,
        'site_on' => $setting->site_on
    ]);
}

Or more shortly code is

public function register()
{
    $setting = DB::table('settings')
        ->where('id', 1)
        ->first(['popup', 'image_resize', 'site_on']);
    Config::set('global', get_object_vars($setting));
}

Answer 2

I ran into this problem after I was fiddling with my app/config.php file. I added some options and accidentally put a semi-colon instead of a comma after it. I had:

'vapid_public_key'   => env('VAPID_PUBLIC_KEY'); <--- offending semi-colon
'vapid_private_key'  => env('VAPID_PRIVATE_KEY'),

Changed it to the proper comma and everything works as expected.