Do those imports!

client/components/cards/attachments.js

@@ -1,3 +1,5 @@
+import Attachments from '../../../models/attachments';
+
 Template.attachmentsGalery.events({
   'click .js-add-attachment': Popup.open('cardAttachments'),
   'click .js-confirm-delete': Popup.afterConfirm(

client/components/main/editor.js

@@ -1,3 +1,5 @@
+import Attachments from '../../../models/attachments';
+
 Template.editor.onRendered(() => {
   const textareaSelector = 'textarea';
   const mentions = [

client/components/users/userAvatar.js

@@ -1,3 +1,4 @@
+import Avatars from '../../../models/avatars';
 Template.userAvatar.helpers({
   userData() {
     // We need to handle a special case for the search results provided by the

models/activities.js

@@ -1,3 +1,5 @@
+import Attachments from './attachments';
+
 // Activities don't need a schema because they are always set from the a trusted
 // environment - the server - and there is no risk that a user change the logic
 // we use with this collection. Moreover using a schema for this collection

models/boards.js

@@ -1,3 +1,5 @@
+import Attachments from './attachments';
+
 Boards = new Mongo.Collection('boards');
 
 /**

models/cards.js

@@ -1,3 +1,5 @@
+import Attachments from './attachments';
+
 Cards = new Mongo.Collection('cards');
 
 // XXX To improve pub/sub performances a card document should include a

models/exporter.js

@@ -1,3 +1,5 @@
+import Attachments from './attachments';
+
 //const stringify = require('csv-stringify');
 
 // exporter maybe is broken since Gridfs introduced, add fs and path

server/publications/boards.js

@@ -1,3 +1,5 @@
+import Attachments from '../../models/attachments';
+
 // This is the publication used to display the board list. We publish all the
 // non-archived boards:
 // 1. that the user is a member of