Crud: Error on relationship or select columns with custom attribute as value

[bastos71]

Bug report

What I did

Try to use a combined attribute as select or relationship column value

Example :

// MyCrudController.php
$this->crud->addColumn([
    'name' => 'customer',
    'type' => 'relationship',
    'label' => 'Customer Full Name',
    'attribute' => 'full_name',
]);

// Customer.php
public function getFullNameAttribute(): string
{
    return sprintf('%s %s', $this->first_name, $$this->last_name);
}

What I expected to happen

Show me the value :)

What happened

Throwed an error :(

What I've already tried to fix it

Add my custom combined attribute in the $append entitie's property.

// Customer.php
protected $appends = [
    'full_name',
];

Backpack, Laravel, PHP, DB version

When I run php artisan backpack:version the output is:

### PHP VERSION:
PHP 7.3.13 (cli) (built: Dec 18 2019 16:08:06) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.13, Copyright (c) 1998-2018 Zend Technologies
    with Zend OPcache v7.3.13, Copyright (c) 1999-2018, by Zend Technologies

### LARAVEL VERSION:
v6.18.13@39519d03237a81380e2126d667e898e2922db444

### BACKPACK VERSION:
4.1.2@7084182b38bff6b19624788ff143bb249ecdc758

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[pxpm]

Hello @bastos71

Sorry for introducing this change without documenting it. Well, i missed it, that's why it's not documented :disappointed:

It's related to #2810

I'v fixed it with #2815

So I am going to close this.

Thanks for report :)

[bastos71]

Thx for your answer !
My bad, I did not see the previous issue