show default object from model if table is empty

I have 2 models named setting and settings one controller settingController

following is database table name setting

id key    Value      created_at       updated_at

if this table is empty then I want to show some default values. following my model codes

namespace App;

use IlluminateDatabaseEloquentModel;

class Setting extends Model
{
protected $fillable = ['key', 'value'];
}

and settings model

namespace App;

use IlluminateDatabaseEloquentModel;

class Settings extends Model
{
const options = [
'key' => 'some_val',
'value' => 0
];

public function __construct()
{

foreach (self::options as $option => $default_value) {
$this->{$option} = $default_value;
}

$settings = Setting::all();
foreach ($settings as $setting) {
$this->{$setting->key} = $setting->value;
}
}

}

Now while model call in controller

public function getEdit()
{
$settings = Settings::all();
dd($settings);
return view::make('admin/settings', compact('settings'));
}

If there is data in the table then it should show the table data. if no data then it should show the default options.

Now I am only getting empty while there is no data in a table. How can i solve above issue?

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