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@JanMikes
Last active November 28, 2016 21:36
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Draft of possible immutable append-only entities
<?php
class Article
{
/** @var \DateTime */
private $createdAt;
/** @var ArticleHistory[] */
private $historyChanges;
public function __construct($text)
{
$this->createdAt = new \DateTime;
$this->updateText($text);
}
public function updateText($text)
{
$this->historyChanges[] = new ArticleHistory($this, $text);
}
public function text()
{
// případně jiná logika, na vytáhnutí poslední změny
return $this->historyChanges->last()->text();
}
}
class ArticleHistory
{
/** @var Article */
private $article;
/** @var \DateTime */
private $createdAt;
/** @var string */
private $text;
public function __construct(Article $article, $text)
{
$this->createdAt = new \DateTime;
$this->article = $article;
$this->text = $text;
}
public function text()
{
return $this->text;
}
}
<?php
class Article
{
/** @var UuidInterface */
private $id; // primary key
/** @var UuidInterface */
private $articleId; // non-unique
/** @var string */
private $text;
public function __construct($text, $articleId = NULL)
{
$this->id = Uuid::uuid4();
$this->articleId = $articleId ? $articleId : Uuid::uuid4();
$this->text = $text;
}
public function updateText($text)
{
return new Article($text, $this->articleId);
}
public function text()
{
return $this->text;
}
}
Possible solution - dispatch domain event, something like "ArticleEdited" every time any editation happens -> this domain event could be persisted and saved into other persistence storage type (nosql etc.).
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