Javascript feetor.users.findOne（）返回未定义的，但它'；他还在工作

我正在接触meteor.js，我对一些事情很困惑

我写了一个新的收藏：

sendEmailAfterNotification = function(comment) {

  var post = Posts.findOne(comment.postId);

  if (comment.userId !== post.userId) {

    Meteor.call('sendEmail',
                Meteor.users.findOne(post.userId).emails[0].address,
                'automailer@yourdomain.com',
                comment.author + ' answered on your post : ' + post.title,
                'random bodytext');

  }
};

我的meteor控制台输出完全正常，我将获得：

I20160424-16:00:54.758(2)? ====== BEGIN MAIL #0 ======
I20160424-16:00:54.766(2)? (Mail not sent; to enable sending, set the MAIL_URL environment variable.)
I20160424-16:00:54.767(2)? MIME-Version: 1.0
I20160424-16:00:54.767(2)? From: automailer@yourdomain.com
I20160424-16:00:54.767(2)? To: test@testdomain.com
I20160424-16:00:54.767(2)? Subject: testuser answered on your post : foobar
I20160424-16:00:54.767(2)? Content-Type: text/plain; charset=utf-8
I20160424-16:00:54.767(2)? Content-Transfer-Encoding: quoted-printable
I20160424-16:00:54.767(2)? 
I20160424-16:00:54.768(2)? random body text
I20160424-16:00:54.768(2)? ====== END MAIL #0 ======

但在我的浏览器中，我仍然得到一个错误代码：

模拟调用“commentInsert”TypeError的效果时出现异常：无法读取未定义（…）TypeError的属性“emails”：无法读取未定义的属性“emails”

在此处调用该函数： comments.js

Comments = new Mongo.Collection('comments');

Meteor.methods({
  commentInsert: function(commentAttributes) {
  check(this.userId, String);
  check(commentAttributes, {
  postId: String,
  body: String
});

var user = Meteor.user();
var post = Posts.findOne(commentAttributes.postId);

if (!post)
  throw new Meteor.Error('invalid-comment', 'You must comment on a post');

comment = _.extend(commentAttributes, {
  userId: user._id,
  author: user.username,
  submitted: new Date()
});

// update the post with the number of comments
Posts.update(comment.postId, {$inc: {commentsCount: 1}});

// create the comment, save the id
comment._id = Comments.insert(comment);

// now create a notification, informing the user that there's been a comment
createCommentNotification(comment);

// send an email to the post owner - if it's not the owner
sendEmailAfterNotification(comment);

return comment._id;
}
});

---

Meteor.users.findOne（post.userId）

在客户端不起作用，因为客户端在

Meteor.users

集合中只有当前用户的数据。确保您的服务器端

sendmail

是查询

Meteor.users

，而不是客户端。

Meteor.users在客户端工作，只需确保您已发布并订阅了

Meteor.users。手动查找（{}，{}）

。

它返回未定义，因为您试图从尚未订阅的源获取数据并发布所有用户的数据，所以并不建议您发布所有用户的数据（出于安全和性能目的）。他可以只发布所需的用户或基于必要的条件发布