Rails - May 2010 - why story.votes return Array, but story.votes.create works?

In Ruby on Rails, say a Story object can "has_many" Vote objects  (a
story is voted "hot" by many users).

So when we do a

    s = Story.find(:first)

"s" is a Story object, and say

    s.votes

returns "[]"
and

    s.votes.class

returns "Array"

So clearly, s.votes is an empty Array object.

At this time, when

    s.votes.create

is called, it actually invokes a method of the Vote class?  How come an
Array class object can invoke a Vote class method?
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On May 23, 7:10 am, Jian Lin
<li...-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote:
>
> So clearly, s.votes is an empty Array object.
>
Actually it''s not. It''s an AssociationProxy object pretending
to be an
instance of Array

Fred
> At this time, when
>
>     s.votes.create
>
> is called, it actually invokes a method of the Vote class?  How come an
> Array class object can invoke a Vote class method?
> --
> Posted viahttp://www.ruby-forum.com/.
>
> --
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Frederick Cheung wrote:
> On May 23, 7:10�am, Jian Lin
<li...-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote:
> 
>>
>> So clearly, s.votes is an empty Array object.
>>
> 
> Actually it''s not. It''s an AssociationProxy object
pretending to be an
> instance of Array
> 
> Fred
not like this?

irb(main):010:0> class Foo
irb(main):011:1>   def class
irb(main):012:2>     return Fixnum
irb(main):013:2>   end
irb(main):014:1> end
=> nil

irb(main):015:0> f = Foo.new
=> #<Foo:0x4799ce8>

irb(main):016:0> f.class
=> Fixnum

irb(main):017:0>

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