Метод 1: использование метода find

$id = 1; // Replace with the desired ID
$model = App\Models\YourModel::find($id);
if ($model) {
    // The model with the given ID exists
    // Code logic for existing model
} else {
    // The model with the given ID does not exist
    // Code logic for non-existing model
}

Метод 2. Использование метода exists

$id = 1; // Replace with the desired ID
$exists = App\Models\YourModel::where('id', $id)->exists();
if ($exists) {
    // The model with the given ID exists
    // Code logic for existing model
} else {
    // The model with the given ID does not exist
    // Code logic for non-existing model
}

Метод 3. Использование метода findOrFail

$id = 1; // Replace with the desired ID
try {
    $model = App\Models\YourModel::findOrFail($id);
    // The model with the given ID exists
    // Code logic for existing model
} catch (\Illuminate\Database\Eloquent\ModelNotFoundException $exception) {
    // The model with the given ID does not exist
    // Code logic for non-existing model
}

Метод 4. Использование метода count

$id = 1; // Replace with the desired ID
$count = App\Models\YourModel::where('id', $id)->count();
if ($count > 0) {
    // The model with the given ID exists
    // Code logic for existing model
} else {
    // The model with the given ID does not exist
    // Code logic for non-existing model
}

Метод 5: использование статического метода exists

$id = 1; // Replace with the desired ID
$exists = App\Models\YourModel::exists($id);
if ($exists) {
    // The model with the given ID exists
    // Code logic for existing model
} else {
    // The model with the given ID does not exist
    // Code logic for non-existing model
}