使用流星方法传递用户数组

Question

I have this Meteor method on my server:

returnUsers: function(){
        console.log(Meteor.users.find());
}

And the following call on my client:

'click #share_button': function(ev){
        ev.preventDefault();
        Meteor.call('returnUsers');
 }

But it returns an empty array:

LocalCollection.Cursor {collection: LocalCollection, sorter: null, _selectorId: undefined, matcher: Minimongo.Matcher, skip: undefined…}

How do I return an array of all users?

Answer 1

You need to fetch the documents in order to return an array from your method. Something like this:

returnUsers: function() {
  var selector = {};
  var options = {fields: {username: 1}};
  return Meteor.users.find(selector, options).fetch();
}

Note that it's critical that you filter the fields in order to avoid sending all of your users' secrets to the client. For more information see the "published secrets" section in my common mistakes article.

It's hard to say without knowing your use case, but instead of using a method, it may make more sense to publish some subset of users to your client, rather than fetching all of them on an event.

---

In order to get the result back from the server, you should invoke the method like this:

Meteor.call('returnUsers', function(err, users) {
  console.log(users);
});