Temukan &kembalikan subdokumen pertama yang cocok dari array (Meteor / Mongo)

Pengguna meteor:pada saat penulisan (versi 1.0.4.1), agregasi pada klien tidak didukung.

Saya ingin menyimpan kode di klien, dan juga ingin reaktivitas, jadi inilah solusi saya:

db.projects

// simplified structure

{
      title: 'awebsite.com'
      company: 'a company'
      companyID: Random.id()
      category: 'website'
      starred: false
      tasks: [
          {
            completed: true
            name: 'task1'
            category: 'ideas'
            todos: [
              {todo: 'something', completed: false, todoID: Random.id()}
              {todo: 'something', completed: false, todoID: Random.id()}
              {todo: 'something', completed: false, todoID: Random.id()}
            ]
          }
          {
            completed: false
            name: 'task2'
            category: 'ideas'
            todos: [
              {todo: 'something', completed: false, todoID: Random.id()}
              {todo: 'something', completed: false, todoID: Random.id()}
              {todo: 'something', completed: false, todoID: Random.id()}
            ]
          }
        ]
    }

../projects.coffee

Meteor.subscribe 'projects'
Tasks = new (Mongo.Collection)(null)   //use (null) to create client-only collection

Template.projects.rendered = ->
  results = Projects.findOne { title: 'awebsite.com' },
    fields: tasks: 1

  _.each results.tasks, (task) ->
    Tasks.insert (task)

Template.projects.helpers
  currentTask: ->
    Tasks.findOne completed: false