Ruby on rails 如何在散列的余烬数组中生成

我是新来的

我有这个函数

producerTypes: ( ->
  types = @get('model.registrations').mapBy('type').compact().uniq()
  //Here array of hashes to types and another model call requirements
).property('model.registrations')

如何在余烬中生成哈希数组

谢谢’：）

  producerRequirements: ( ->
    documentation = []
    types = @get('model.registrationsDocumentations').
              mapBy('producerType').compact().uniq()  //first map by type
    for producerType in types
      requirements = @get('model.registrationsDocumentations').
                          filterBy('producerType', producerType)   //second filter by producerType
      documentation.addObject(               //add to the array
        producerType: producerType,
        requirements: requirements
      )
    documentation
  ).property('model.registrationsDocumentations.@each')