coffeescript和node中的静态方法

Question

I'm fairly new to using coffeescript and I have the following code

eventBus = require './eventBus'                      

class Aggregate                                       
  constructor(id) ->                                  
    @_id = id                                         

  @find: (id) ->                                                              
    console.log "Find Called"
    new Aggregate(id)                                                 

  @apply: (event) ->                                                          
    @_total += event.attribute.amount                                         

  @emit: (event) ->                                                           
     EventBus.store event                                                     

module.Aggregate = Aggregate

The problem I have is I want to call Aggregate.find 20 which in turn will return a new aggregate with that ID. Any advice on how to get this module to work like this would be greatly appreciated.

Cheers Mike.

Answer 1

Your code should work fine, except that you have a syntax error in your constructor.

Change:

constructor(id) ->

to:

constructor: (id) ->

Answer 2

Append this somewhere:

Aggregate.find = (id) ->                                                              
  console.log "Find Called"
  new Aggregate(id)                                                 

And it would be "static" method.