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HomeBackend DevelopmentPHP Tutorial类似QQ空间的评论表是怎么设计的。


如果是存在一张表里,能只使用一条语句就可以查询处理的吗?难道只能分两次查询?


回复讨论(解决方案)

一条可以,php处理无限分类就是了。

一次就OK,结构自己组装

一次就OK,结构自己组装


带有分页功能。。。

一条可以,php处理无限分类就是了。


带有分页功能。


一次就OK,结构自己组装


带有分页功能。。。 暂时能想到的就是一次读取所有,程序自己分页。为防止出现错乱,每页最后的ID作为参数传出,请求下一页时作为分页依据



一次就OK,结构自己组装


带有分页功能。。。 暂时能想到的就是一次读取所有,程序自己分页。为防止出现错乱,每页最后的ID作为参数传出,请求下一页时作为分页依据
每分一次页,全部取出来会不会太坑了。。




一次就OK,结构自己组装


带有分页功能。。。 暂时能想到的就是一次读取所有,程序自己分页。为防止出现错乱,每页最后的ID作为参数传出,请求下一页时作为分页依据
每分一次页,全部取出来会不会太坑了。。
要么取出来的时候麻烦,要么存进去的时候更麻烦,选一样。主要是这种评论本来就不是绝对顺序的。对于QQ这种评论来说很难有超长的评论,一次全取没有问题





一次就OK,结构自己组装


带有分页功能。。。 暂时能想到的就是一次读取所有,程序自己分页。为防止出现错乱,每页最后的ID作为参数传出,请求下一页时作为分页依据
每分一次页,全部取出来会不会太坑了。。
要么取出来的时候麻烦,要么存进去的时候更麻烦,选一样。主要是这种评论本来就不是绝对顺序的。对于QQ这种评论来说很难有超长的评论,一次全取没有问题
是每一页都一次取,而且QQ还可以支持二级里收起展开评论






一次就OK,结构自己组装


带有分页功能。。。 暂时能想到的就是一次读取所有,程序自己分页。为防止出现错乱,每页最后的ID作为参数传出,请求下一页时作为分页依据
每分一次页,全部取出来会不会太坑了。。
要么取出来的时候麻烦,要么存进去的时候更麻烦,选一样。主要是这种评论本来就不是绝对顺序的。对于QQ这种评论来说很难有超长的评论,一次全取没有问题
是每一页都一次取,而且QQ还可以支持二级里收起展开评论
我的意思是每次请求都把数据全读出来分页,每次点下一页都要请求一次读一次数据库。至于收起展开二级评论只是前端的小把戏

现在的网速都很快,ajax 技术也很成熟。没有必要再去纠结了
首次读取主贴一页,回复按需用 ajax 加载。简洁明了,算法简单

基于这中架构,只需按邻接列表组织数据即可

现在的网速都很快,ajax 技术也很成熟。没有必要再去纠结了
首次读取主贴一页,回复按需用 ajax 加载。简洁明了,算法简单

基于这中架构,只需按邻接列表组织数据即可


版大的意思采用两次去读取吗,第一次先读取一级评论,第二次再去读取二级评论也就是回复的意思吗?

是的,第一次先读取一级评论,第二次再去读取一级评论的二级评论
即开始是全部折叠的,点击才展开

是的,第一次先读取一级评论,第二次再去读取一级评论的二级评论
即开始是全部折叠的,点击才展开


那不就是在一级评论集下面foreach循环再去读取,这样会不会太慢了。。。我默认是会显示出两条二级评论。

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