How can I detect changes to Laravel's auth()->user() Object-CodePudding

How can I detect a change to a specific element in the auth()->user() object?

The general scenario is:

user is logged-in and the auth()->user() contains a copy of the User model
A field in the User database table is updated by another (CMS) application
When the auth()->user() object is next updated, I need to compare the previous value of the field to the current value that was retrieved from the database

I think the easiest solution is to assign the field's value to a session variable BEFORE the auth()->user() is updated, but I cannot figure out where to insert such a session var assignment.

CodePudding user response：

If your problem is update the user model with the data modified, you can rehidrate the model instance by using

auth()->user()->fresh();

additionally you can eager loads any relation in the model.

auth()->user()->fresh('comments');

In the case you need to compare if any property in the instance have changed making a copy of the original before calling fresh method, you will have to compare properties, unless exists a method which could compare both instances directly, which I don´t know

CodePudding user response：

It looks like adding an event listener to my User model will do the trick:

/**
 * MODEL EVENTS:
 */
public static function boot() {
    parent::boot();

    // extra actions when retrieving
    static::retrieved(function($model)  {
        if (Session::get('member_type') != $model->member_type) {
            Session::put('previous_member_type', Session::get('member_type'));
            Session::put('member_type', $model->member_type);
        }
    });
}

Each time the User model is retrieved, I update 2 session variables, one containing the current value, the other containing the previous value.