Initialising an object with dynamic name - coffeescript/node.js/javaScript

Question

I am attempting to build a plugin system where I do not know the plugins beforehand. Initialising an object using 'require' from browserify. As follows:

class.coffee:

   class MyClass
    name: "my-class"
    constructor: ->

    @getName: ->
        return @name

  exports.plugin = new MyClass

Then from the calling file I have:

pluginName = # from a config file
{ plugin } = require './#{pluginName}.coffee'
console.log plugin
console.log plugin.getName()

The first logger call gives me:

MyClass{ name="my-class" }

The second one fails however with plugin.getName is not a function.

Any help/guidance appreciated. I'm not a JS developer and am new to coffeescript/node.js as well.

Thanks.

loganfsmyth · Accepted Answer · 2012-05-21 16:35:16Z

1

You should not have the @ before getName.

Having the @ is equivalent to this in JS

MyClass.getName = function(){
  return this.name;
};

But in this case, getName is a function on the class itself, not the MyClass instance.

Without the @, like this, getName: -> the JS is like this:

MyClass.prototype.getName = function(){
  return this.name;
}

answered May 21, 2012 at 16:35

loganfsmyth

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1 Comment

Lloyd Watkin Over a year ago

Thanks, I'd been playing around with that and obviously left it the wrong way around. I've marked your answer as accepted answer, thanks.

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