javascript - bluebird的populateAsync怎么使用呢？

问题描述

问 题

这样写代码会报错：

 PostModel.findAsync({author:author}).populateAsync('author')
            .then(function (posts) {
                res.render('posts', {
                    posts: posts
                });
            })
            .catch(next);

错误为：

bluebird这个库的populate是怎么用的呢？

解决方案

• PostModel.find is not a callback method or even asynchronous so PostModel.findAsync doesn't make sense. You shouldn't need to promisify your own classes you should just have your clasess to return promises to begin with.

• If you have promisified mongoose somewhere:

Promise.promisifyAll(require("mongoose"));

You can do

PostModel.find({author: author })
    .populate("author")
    .execAsync()
    .then(function(posts) {
        res.render('posts', { posts: posts  });
    })
    .catch(next);

• populate is not a function of bluebird, it's one of mongoose

• Reference from here

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