Rails - Jan 2006 - problem with options_for_select

Hi All,

I am having a little difficulty using the options_for_select forms  
helper method. I have a form for an active record object book, which  
belongs to a publisher. Using the options_for_select is working fine  
as far as creating the various options, but it will not output the  
"selected=''selected''" bit of html needed to identify
which publisher
is associated with a give book in the database. In order to so so I  
am passing it the @book.publishers array, but I suppose I am missing  
something. The docs say that the selected element may be an array of  
values, but I can''t get it to work. Any ideas? My code is below.  
Thanks in advance.

Sean

<select name="publisher_ids[]">
<%= options_for_select (@publishers.map {|p| [truncate 
(p.publisher_name, length = 30, truncate_string = "..."), p.id]},  
@book.publishers )%>
</select>

You need to give it an id (or perhaps array of ids), so as your second 
parameter try @book.publishers.map {|p| p.id}
(I think...)

Michael


Alien8 Recordings wrote:
> Hi All,
> 
> I am having a little difficulty using the options_for_select forms
> helper method. I have a form for an active record object book, which
> belongs to a publisher. Using the options_for_select is working fine
> as far as creating the various options, but it will not output the
> "selected=''selected''" bit of html needed to
identify which publisher
> is associated with a give book in the database. In order to so so I
> am passing it the @book.publishers array, but I suppose I am missing
> something. The docs say that the selected element may be an array of
> values, but I can''t get it to work. Any ideas? My code is below.
> Thanks in advance.
> 
> Sean
> 
> <select name="publisher_ids[]">
> <%= options_for_select (@publishers.map {|p| [truncate
> (p.publisher_name, length = 30, truncate_string = "..."), p.id]},
> @book.publishers )%>
> </select>

-- 
Posted via http://www.ruby-forum.com/.

Hi Michael,

I guess that was quite obvious, but thank you, working like a charm!

Sean

On 24-Jan-06, at 2:53 AM, Michael Bannister wrote:
> You need to give it an id (or perhaps array of ids), so as your second
> parameter try @book.publishers.map {|p| p.id}
> (I think...)
>
> Michael
>
>
> Alien8 Recordings wrote:
>> Hi All,
>>
>> I am having a little difficulty using the options_for_select forms
>> helper method. I have a form for an active record object book, which
>> belongs to a publisher. Using the options_for_select is working fine
>> as far as creating the various options, but it will not output the
>> "selected=''selected''" bit of html needed to
identify which publisher
>> is associated with a give book in the database. In order to so so I
>> am passing it the @book.publishers array, but I suppose I am missing
>> something. The docs say that the selected element may be an array of
>> values, but I can''t get it to work. Any ideas? My code is
below.
>> Thanks in advance.
>>
>> Sean
>>
>> <select name="publisher_ids[]">
>> <%= options_for_select (@publishers.map {|p| [truncate
>> (p.publisher_name, length = 30, truncate_string = "..."),
p.id]},
>> @book.publishers )%>
>> </select>
>
>
> -- 
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
>