this.userId returns undefined inside Meteor.publish

Question

In one of my Meteor.publish() functions, this.userId has the value of undefined . I can't call Meteor.userId() because it's not available inside a publish function . How are you supposed to get userId now?

Answer 1

There are four possibilities:

1. There is no user logged in.

2. You're calling the method from the server, and there will thus be no user associated with the call ( unless you're calling it from another function which will have a user bound to its environment, like another method or a subscribe function).

3. You don't even have the accounts-base package (or any of the add-ons) installed. I'm only including this for completeness.

4. You are using an arrow function in ES6. Meteor.publish('invoices', function() { return invoices.find({by: this.userId}); }); will work just fine, whilst Meteor.publish('invoices', () => { return invoices.find({by: this.userId}); }); will return an empty cursor, because this will have no userId property. This happens because an arrow function does not bind its own this , arguments , super , or new.target .

If it's definitely not (2), what happens when you log Meteor.userId() immediately before you make the method call on the client?

Answer 2

FIXED:

import { Meteor } from 'meteor/meteor';
import { Roles } from 'meteor/alanning:roles';
import _ from 'lodash';

import { check } from 'meteor/check';


import Corporations from '../corporations';

Meteor.publish('corporations.list', () => {
  const self = this.Meteor; // <-- see here 
  const userId = self.userId();
  const user = self.user();

  let filters = {};

  if (user) {
    if (!Roles.userIsInRole(userId, ['SuperAdminHolos'])) { // No Está en el Rol SuperAdminHolos
      filters = { adminsEmails: { $in: _.map(user.emails, 'address') } };
    }
    return Corporations.find(filters);
  } else return;
});

Answer 3

您应该使用Meteor.userId（）。