Meteor.users.findOne() 返回 undefined 但它仍在工作

Question

我开始接触meteor.js，我对一些事情感到很困惑。

我写了一个新合集：

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');

  }
};

我的流星控制台输出完全没问题，我会得到：

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收到错误代码：

模拟调用“commentInsert”的效果时出现异常 TypeError: Cannot read property 'emails' of undefined(...) TypeError: Cannot read property 'emails' of undefined

函数在这里被调用： cmets.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;
}
});

Answer 1

Meteor.users.findOne(post.userId) 在客户端上不起作用，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 sendEmail 是查询 Meteor.users 的那个，而不是客户端。

Answer 2

Meteor.users 在客户端工作，只需确保您已手动发布和订阅Meteor.users.find({},{})。