Http Request - Should I reload the eloquent model information inside a Http Request Life Cycle?-CodePudding

https://laravel.com/docs/9.x/eloquent#refreshing-models

If you already have an instance of an Eloquent model that was retrieved from the database, you can "refresh" the model using the fresh and refresh methods. The fresh method will re-retrieve the model from the database. The existing model instance will not be affected:

$flight = Flight::where('number', 'FR 900')->first();
$freshFlight = $flight->fresh();

The refresh method will re-hydrate the existing model using fresh data from the database. In addition, all of its loaded relationships will be refreshed as well:

$flight = Flight::where('number', 'FR 900')->first();
$flight->number = 'FR 456';
$flight->refresh();
$flight->number; // "FR 900"

All the time (regularly) I make my requests by querying the models and relations only once for a normal http request (e.g. post-redirect-get or simply for a get).

When should I reload the relation or model information?

I feel that I have done my requests wrong after seeing this part of the Laravel documentation.

Could you give me some use cases for fresh()/refresh()? Please

Is there something that escapes my knowledge?

CodePudding user response：

Fresh and refresh are used when your model might have been change since it's first query

exemple :

// The passenger is in the FR 900 Flight
$passenger = Passenger::with('flight')->find(1);

// dd($passenger->flight->number); => FR 900

$flight = Flight::where('number', 'FR 900')->first();
$flight->number = 'FR 456';
$flight->save();

// dd($passenger->flight->number); => FR 900


$passenger->flight->fresh(); // Refresh Only the flight
// OR
$passenger->refresh(); // Refresh The Passenger AND ALL his relationships (his flight)

// dd($passenger->flight->number); => FR 456

The fresh method will get only the model it's been called The refresh method will make a fresh() on the model and all it's loaded relationships