帖子、评论、回复和点赞数据库模式

我有一个网站，用户可以在那里评论帖子或回复评论。用户还可以喜欢回复或评论。但是，在REPLY表中还有另一个名为REPLY_TO的字段。以下是我当前的架构：

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)

这看起来是一个可以使用的好架构，还是有更好的方法来创建这种结构？

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解决方案

我建议如下结构，只有2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本身只是一个comment，只是某个父注释的子级。因此，我不会将其作为单独的实体。
• 请注意，您需要注意删除操作，并删除当前评论被删除的所有评论，因为它是parent_id。为此，您可以借助ON DELETE CASCADE。