你会如何做一个带有修改的评论系统？

Question

我需要实施一个经过修订的评论系统。

我正在使用 Doctrine2。

我需要在编辑时存储所有评论，但仅显示最后一条评论，但是我需要能够显示所有旧评论并始终显示评论数

Answer 1

看看DoctrineExtensions中的Versionable

基本上你让你的实体实现Versionable并且添加版本字段。它与 VersionManager 捆绑在一起，允许您回滚到特定版本。

实体上的版本字段将指示修订数量。

Answer 2

像这样的东西......我会让你填空：

<?php

/** @Entity */
class Comment
{

    private $name;

    private $email;

    private $website;

    /** @OneToMany(targetEntity="CommentVersion") */
    private $versions;

    public function __construct($name, $website, $email, $comment)
    {
        $this->name = $name;
        $this->email = $email;
        $this->website = $website;
        $this->setComment($comment);
    }

    public function setComment($text)
    {
        $this->versions->add(new CommentVersion($text));
    }

    public function getComment()
    {
        $latestVersion = false;
        foreach($this->versions as $version){
            if(!$latestVersion){
                $latestVersion = $version;
                continue;
            }

            if($version->getCreatedAt() > $latestVersion->getCreatedAt()){
                $latestVersion = $version;
            }
        }

        return $latestVersion->getComment();
    }

    public function getRevisionHistory()
    {
        return $this->comments->toArray();
    }

}

/** @Entity */
class CommentVersion
{

    /** @Column(type="string") */
    private $comment;

    /** @Column(type="datetime") */
    private $createdAt;

    public function __construct($comment)
    {
        $this->comment   = $comment;
        $this->createdAt = new \DateTime();
    }

    public function getCreatedAt()
    {
        return $this->createdAt;
    }

    public function getComment()
    {
        return $this->comment;
    }

}

用法非常简单：

<?php

$comment = new Comment("Cobby", "http://cobbweb.me", "[email protected]", "Some comment text");
$em->persist($comment);
$em->flush();

$comment->getComment(); // Some comment text

$comment->setComment("Revision 2");
$dm->flush();

$comment->getComment(); // Revision 2

$comment->getRevisionHistory();
// CommentVersion(0): "Some comment text"
// CommentVersion(1): "Revision 2"

我还没有测试过这个，但你明白了......