mysql Posts，comments，replies，and likes数据库模式[关闭]

b4wnujal 于 2023-10-15 发布在 Mysql

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我有一个网站，用户可以评论帖子或回复评论。用户也可以喜欢回复或评论。但是，在应答表中还有另一个名为reply_to的字段。以下是我当前的schema：

Comment
id
user (foreign key)
post (foreign key)
comment

Reply
id
user (foreign key)
reply_to (who the user is replying to)
comment (foreign key)
reply

CommentLike (Table that shows which user liked which comments)
id
comment (foreign key)
user (foreign key)
like (1 = likes, 0 = dislikes)

ReplyLike (Table that shows which user liked which replies)
id
reply (foreign key)
user (foreign key)
like (1 = likes, 0 = dislikes)

这看起来像是一个很好的模式，或者有更好的方法来创建这种结构吗？

mysql

来源：https://stackoverflow.com/questions/55074867/posts-comments-replies-and-likes-database-schema

1条答案

按热度按时间

qjp7pelc1#

我建议的结构如下，只有两个表：

Comment:
id
user (foreign key)
post (foreign key)
comment_text
parent_comment_id (null or -1 if a new comment and comment_id of the parent if a reply)

CommentLike (Table that shows which user liked which comments):
id
comment (foreign key)
user (foreign key)
like (1 = likes, 0 = dislikes)

这样做的原因是因为reply本身就是一个comment，只是父注解的子注解。因此，我不会把它作为一个单独的实体。
请注意，您需要注意删除操作，并删除所有将当前评论作为parent_id删除的评论。您可以使用ON DELETE CASCADE来实现这一点。

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mysql Posts，comments，replies，and likes数据库模式[关闭]

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