Joining collections in Meteor/Mongo

meteor-collection-joins.coffee

# In an Iron Router Route (requires that the below publication is also set up)
# =====================================

Router.configure
  layoutTemplate: 'layout'
  loadingTemplate: 'loading'

Router.map ->
  
  @route 'member_show',
    path: '/members/:_id',
    template: 'members_show',
    waitOn: ->
      return [
        Meteor.subscribe('members'),
        Meteor.subscribe('documents',  @params._id)
      ]
    data: ->
      return {
        member: Members.findOne({_id: @params._id})
        documents: Documents.find()
      }

# In typical publish
# =====================================

Meteor.publish 'documents', (member_id) ->
  return Documents.find() unless member_id?
  member = Members.findOne
    _id: member_id
  return Documents.find
    _id: {$in: member.documents}