2
因此,假设我有3个博客作者。他们每个人都有很多帖子。为集合中的每个博客选择最新帖子
我想选择每个人的最新帖子。
目前我有这样的伪代码:
Bloggers.find({name: {$in: ['John','Mike','Arny']}}, (err, bloggers) => {
bloggers.forEach(blogger => {
blogger.latest_post = Posts.find({author: blogger.name}).sort({date: -1}).limit(1);
})
displayItSomehow(bloggers);
})
这里,博客的名字是一组名称。每个组都有很多文档,但我只需要一个相应的标准。
博客收集这样的:
{name: 'John', id: 1},
{name: 'Mike', id: 2},
{name: 'Arny', id: 3}
帖子集合:
{ title: 'title1', text: 'blablabla', date: 111, author: 1 },
{ title: 'Nowadays football became...', text: 'blablabla', date: 112, author: 1 },
{ title: 'title1', text: 'blablabla', date: 113, author: 2 },
{ title: 'The story of my neighbor starts when...', text: 'blablabla', date: 114, author: 2 },
{ title: 'title1', text: 'blablabla', date: 115, author: 3 },
{ title: 'title1', text: 'blablabla', date: 116, author: 3 },
{ title: 'Business and success are always were...', text: 'blablabla', date: 117, author: 3 }
结果应该是这样的:
John: 'Nowadays football became...'
Mike: 'The story of my neighbor starts when...'
Arny: 'Business and success are always were...'
所以,我怎么能真正解决我的问题在猫鼬?一个查询可能吗?
请将样本集合添加到博客和帖子的帖子 – Veeram
是t帽子更好?) –