如何从find方法返回Mongoose结果？ [英] How to return Mongoose results from the find method?

问题描述

我可以找到的任何可以使用mongoose结果重绘页面的内容都可以这样做：

  users.find（{ }，function（err，docs）{
 res.render（'profile / profile'，{
 users：docs 
}）; 
}）; 
  

如何从查询中返回结果，更像这样？

  var a_users = users.find（{}）; //非工作示例
  

所以我可以在页面上获得多个结果发布？ p>

喜欢：

  / *非工作示例* / 
 var a_users = users.find（{}）; 
 var a_articles = articles.find（{}）; 
 
 res.render（'profile / profile'，{
 users：a_users 
，articles：a_articles 
}）; 
  

可以这样吗？

解决方案

你试图强制一个同步的范例。不行在大多数情况下，node.js是单线程的，当io完成时，执行上下文被生成。信令由回调管理。这意味着你有嵌套回调，命名函数或流控制库，使事情更好看。

https://github.com/caolan/async#parallel

  async.parallel（[
 function（cb）{
 users.find（{}，cb）; 
}，
 function（cb）{
 articles.find（{}，cb）; 
} 
]，function（results）{
 //结果包含用户和文章
}）; 
  

Everything I can find for rending a page with mongoose results says to do it like this:

users.find({}, function(err, docs){
    res.render('profile/profile', {
        users:     docs
    });
});

How could I return the results from the query, more like this?

var a_users = users.find({}); //non-working example

So that I could get multiple results to publish on the page?

like:

/* non working example */
var a_users    = users.find({});
var a_articles = articles.find({});

res.render('profile/profile', {
      users:    a_users
    , articles: a_articles
});

Can this be done?

解决方案

You're trying to force a synchronous paradigm. Just does't work. node.js is single threaded, for the most part -- when io is done, the execution context is yielded. Signaling is managed with a callback. What this means is that you either have nested callbacks, named functions, or a flow control library to make things nicer looking.

https://github.com/caolan/async#parallel

async.parallel([
   function(cb){
      users.find({}, cb);
   },
   function(cb){
      articles.find({}, cb);
   }
], function(results){
   // results contains both users and articles
});

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