Crud: Can't edit colums in setupShowOperation

[categoryshell]

Bug report

What I did

I modified a column so it will get its value from an relation

What I expected to happen

The existing column will get a new value

What happened

The column remained unchanged

What I've already tried to fix it

I can add colums, with normal values or values from relations.
I cannot modify or remove existing columns in the show view.

Backpack, Laravel, PHP, DB version

PHP 7.4.3 (cli) (built: Feb 20 2020 21:53:46) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies

mysql Ver 15.1 Distrib 10.4.12-MariaDB, for debian-linux-gnu (x86_64) using rea
dline 5.2

When I run php artisan backpack:version the output is:
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies

LARAVEL VERSION:

v7.3.0@36d8958b5b8058ef0641806e490f91102fdea70d

BACKPACK VERSION:

4.0.58@03432680d8ed839bcbd99ce57aed61bcf7a1b695

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[categoryshell]

Okay, i found a workaround.

In setupShowDefaults() i had to set the operationsetting setFromDb to false:

$this->crud->setOperationSetting('setFromDb', false);

Then in setupShowOperation, re-set it with:

 $this->crud->setFromDb();

After that, i could remove/modify the colums.

[tabacitu]

Thanks for sharing your solution, @categoryshell . Note that if you want that behaviour for all CRUDs, you can add that setting to your config/backpack/crud.php file:

    'operations' => [

        /*
         * Show Operation
         */
        'show' => [
            // Define the size/looks of the content div for all CRUDs
            // To override per Controller use $this->crud->setShowContentClass('class-string')
            'contentClass' => 'col-md-8',
+
+           // Should the Show operation try to add all columns using setFromDb()?
+           'setFromDb' => false,
        ],

[DanielBalsalobre]

I found a problem related to this.
If you include 'model' => in modify/add column on setupShowOperation then ignores the modification.
Removed 'model' attribute on modifyColumn/addColumn and its show the name instead id of relationship.