Here's how I solved this, because callback( ['name', 'type'] -- with two values, in postgres doesn't work.

I will share the error. I didn't save it, but I'm going to try and update. Here is an example though, I think it should be in the documentation. because I was unable to pass two fields through a calback.

This produces a row with an image, a row with an external link that has an svg link image, and an internal link with the slug. I couldn't use the name because of that issue of passing two fieleds through. Also, there didn't seem to be an easy way to render an image.

-- LET ME NOTE: Callback functions are amazing, I just hope I can figure out how to pass a couple fields through. Also, I'm pretty sure that the query builder is broken for Postgres, but I'll update that in another issue.

I've tried 3 tables systems now. This has been the easiest to use so far.

`<?php

namespace App\Http\Livewire\Tables;

use App\Models\SiteAppCounts;
use Mediconesystems\LivewireDatatables\Http\Livewire\LivewireDatatable;
use Mediconesystems\LivewireDatatables\Column;
class SiteAppCountsTable extends LivewireDatatable
{
public $model = SiteAppCounts::class;
public $hideable = 'select';
public $exportable = true;

  public function columns()
  {
      //INSERT INTO "table_schema"."table_name" ("name", "count", "website", "slug", "icon", "categories") VALUES

      return [

          // Name column basic sortable

          // Name column basic sortable

          //column icon tyep ::callback return image from icons in /images/app_icons/icons folder
          Column::callback(['icon'], function ($icon) {
              return "<img src='/images/app_icons/icons/$icon' width='50px' height='50px'/>";
          }),

          Column::callback([ 'slug'], function ($slug) {
              $slug2 = $slug ;
              // name = remove - and upper case first letter
              // link = slug with - and /siteapp/sites/
              $slugrpl = str_replace('-', ' ', $slug2);
              $slugrpl = ucwords($slugrpl);

// return ''.$slugrpl.'';
// link color blue
return ''.$slugrpl.'';

              return $slug2;

          }),

         // SortBy this row and show counts as number with commas
         Column::callback(['count'], function ($count) {
             // make this 30000 to 30,000
             $count = number_format($count);
             return $count;
         })
          ->label('Count')
          ->sortBy('count', 'desc')
          ->filterable(),

          //website with link but exclude from export
          Column::callback(['website'], function ($website) {
             /* using tailwinds icons here
              convert website to a link open in a new tab
              use this svg icon next to the website */
              $svg = '<svg xmlns="http://www.w3.org/2000/svg" class="h-6 w-6 inline" fill="none" viewBox="0 0 24 24" stroke="currentColor">
              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 6H6a2 2 0 00-2 2v10a2 2 0 002 2h10a2 2 0 002-2v-4M14 4h6m0 0v6m0-6L10 14" />
              </svg>';
              $website = "<a href='$website' target='_blank'> $svg   $website</a>";
              return $website;
               })
          ->label('Website')
          ->excludeFromExport()
          ->filterable(),

          //Hide in table but show in export.
          Column::name('website')
          ->label('Website')
          ->hide(),

          Column::callback(['categories'], function ($categories) {

           //   [{"id": 79, "name": "Geolocation", "slug": "geolocation"}, {"id": 80, "name": "Geolocation2", "slug": "geolocation2"}]
              $categories = json_decode($categories);
              $categories = array_map(function ($category) {
                  return $category->name;
              }, $categories);
              $categories = implode(', ', $categories);
              return $categories;  // return categories as a comma separated lists

          })
          ->filterable(),
          
          ];
  }

}
`

Start with the PHP example in issue #357 and inspect the Column::callback entry point, especially callbacks receiving multiple fields and the reported PostgreSQL behavior. Confirm the expected syntax and image-rendering guidance, then document a working example; no documentation file or test is named in the issue.