File ui/src/Table/Column/NoValue.php

1:	<?php
2:
3:	declare(strict_types=1);
4:
5:	namespace Atk4\Ui\Table\Column;
6:
7:	use Atk4\Data\Field;
8:	use Atk4\Data\Model;
9:	use Atk4\Ui\Table;
10:
11:	/**
12:	* Sometime we need null values in DB. When we display values we have holes
13:	* with NoValue decorator we can show a display value for column null value.
14:	*
15:	* $this->addField('field', [
16:	* [...]
17:	* 'ui' => [
18:	* [...],
19:	* 'table' => [
20:	* 'NoValue', ' if empty display this value '
21:	* ],
22:	* ],
23:	* ]);
24:	*/
25:	class NoValue extends Table\Column
26:	{
27:	/** @var string */
28:	public $noValue = ' --- ';
29:
30:	#[\Override]
31:	public function getHtmlTags(Model $row, ?Field $field): array
32:	{
33:	$actualValue = $field->get($row);
34:
35:	if ($actualValue === null \|\| $actualValue === '') {
36:	return [$field->shortName => $this->noValue];
37:	}
38:
39:	return parent::getHtmlTags($row, $field);
40:	}
41:	}
42: