Rails - Sep 2006 - Problems with select pulldowns combined with has_many :through

I''m having problems with the above.  For description purposes,
let''s
just assume I have 3 models:  User, Movie and Viewings, with the
following obvious fields:

users - name
movies - name
viewings - user_id, movie_id

I''m trying to use collection_select to create the appropriate pulldown,
but the following isn''t working:

collection_select("user", "viewings.movie_id", @movies,
"id", "name")

When I run it, I''m getting the following:

undefined method `viewings.movie_id'' for #<User:0x23a32b8>

What am I missing?

- Andy


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mrmarkham wrote:
> I''m having problems with the above.  For description purposes,
let''s
> just assume I have 3 models:  User, Movie and Viewings, with the
> following obvious fields:
> 
> users - name
> movies - name
> viewings - user_id, movie_id
> 
> I''m trying to use collection_select to create the appropriate
pulldown,
> but the following isn''t working:
> 
> collection_select("user", "viewings.movie_id", @movies,
"id", "name")
> 
> When I run it, I''m getting the following:
> 
> undefined method `viewings.movie_id'' for #<User:0x23a32b8>
> 
> What am I missing?
At present, such chained method parameters in Active Record form
helpers won''t work. You have to set @viewings = @user.viewings
and call collection_select(:viewings, :movie_id, @movies, :id, :name)

-- 
We develop, watch us RoR, in numbers too big to ignore.


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