Rails - Feb 2010 - help decoupling models with a foreign key relationship

Recently started working with rails; I''m very impressed so far, but I
do have a question -

Say I''m running a blog-type application.  I''ve got a Users
table, and
a Posts table.  Each post on the blog is made by a user.  The Post
table has an FK user_id that keeps track of the author of the post.
This is all well and good, but I''ve found myself doing this a lot:

class Post
	def get_author_name
		user = User.find(user_id)
		user.name
	end
end

which definitely works for retrieving the author name when I''m
rendering my view, but I''m worried I''m going to be weaving my
classes
too tightly, especially given how often this type of scenario can come
up.

Does anyone have a better approach?

Thanks!

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class Post
  belongs_to :user
end


Then you can do post.user.name retrieve the name of the author of the 
post
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That''s handy!  Does that work too if I say

class Post
  has_one :user
end

I guess the real question is - what''s the difference between has_one
and belongs_to?

On Feb 10, 4:44 am, Sharagoz --
<li...-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:
> class Post
>   belongs_to :user
> end
>
> Then you can do post.user.name retrieve the name of the author of the
> post
> --
> Posted viahttp://www.ruby-forum.com/.
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robo wrote:
> That''s handy!  Does that work too if I say
> 
> class Post
>   has_one :user
> end
> 
> I guess the real question is - what''s the difference between
has_one
> and belongs_to?
The location of the foreign key.  Go read the Associations docs.

Best,
-- 
Marnen Laibow-Koser
http://www.marnen.org
marnen-sbuyVjPbboAdnm+yROfE0A@public.gmane.org
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belongs_to means the foreign key is an attribute of this model.
has_one/has_many means it''s an attribute of the associated model.

On Feb 10, 2010 8:47 AM, "robo"
<chase.delanguillette-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:

That''s handy!  Does that work too if I say

class Post
 has_one :user
end

I guess the real question is - what''s the difference between has_one
and belongs_to?


On Feb 10, 4:44 am, Sharagoz --
<li...-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:
> class Post
>   belongs_to :user
> e...
> Posted viahttp://www.ruby-forum.com/.

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