From: Ehsanul Hoque <ehsanul_g3@...>
Date: 2009-09-28T00:17:30+09:00
Subject: Re: More than one initializer

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Hi

> Hi all=2C
>=20
> I have a module containing two classes the first is 'item' the second is
> 'search'. Lets use twitter as an example:
> module MyTwitter
>   class Item
>     attribute_reader :id=2C :tweet
>     def initialize(text)
>       @tweet =3D text
>       # Post to twitter
>       @id =3D id_from_post_operation
>     end
>   end
>=20
>   class Search
>     def self.do(q)
>       # perform search
>       out =3D []
>       results.each do |hit|
>         # This is the problem point:
>         out << Item.new_from_data(hit.id=2Chit.text)
>       end
>       return out
>     end
>   end
> end
>=20
> When I create a new Item object I have code that creates a new tweet
> however I'd like my Search to return an array of Item objects=2C but if I
> use the standard MyTwitter::Item.new I'll be posting a new item=2C
> not simply creating an object with the id I have from my search.
>=20
> Is there a way to create an object with a given attribute without
> calling .new?

You're probably better off by not making Item.new post a tweet. Instead=2C =
have your initialize method only create an object with id/text attributes s=
et if they are passed in. Then=2C create a self.post method to actually pos=
t tweets. It could look like this:

class Item
attribute_reader :id=2C :tweet
def initialize(id=2C text)
@id=2C @tweet =3D id=2C text
end
def self.post(text)
# Post to twitter
self.new(id_from_post_operation=2C text)
end

That'll solve it I hope. By the way=2C if your items are tweets=2C it makes=
 more sense to call the class Tweet rather than Item. And then the @tweet a=
ttribute could be @text=2C to make it clear as to what it is. the Search cl=
ass probably should just be incorporated into the Tweet class=2C rather tha=
n in a separate class=2C unless you're using search across a number of thin=
gs and not just tweets. But if your items aren't tweets=2C well I'm just be=
ing silly :)

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