Rails - Feb 2009 - collection_select :selected (to get a default value into <se

I''m getting murdered by this thing!  For the life of me, I
can''t figure
it out.  I''ve spent literally days on google.

Here''s what I would like to do (in rails 2.2.2):


<% if params[:cruise_info] %>
<%= collection_select :cabin_type, :cabin_type_id,
CabinType.find_by_status(1).collect {|ct| ct}, :id, :name, {:selected =>
params[:cruise_info][:cabin_type_id]}%>
<% end %>

The intent here is, on re-rendering the page (after a validation
failure), I don''t want the end-user to be required to make the
selection
again.  I have half a dozen collection_selects in this form that are
being returned from partials and are embeded with :fields_for, so
they''re not automatically retaining their selections.

Most of my search results are Bug reports for this, but they''re more
than 2 years old.  It''s gotta be fixed by now right? I have to be doing
something wrong?  I just can''t see it.  I''ve tried using
select,
options_from_collection_for_select, and have the same issue with all of
them.  I''ve tried different variations, like putting it in the options
=> {} and in html_options => {}...and nothing.  I''ve tried
:selected,
:selected_value, I even tried using :include_blank => {...}, which i
knew wouldn''t work, but thought it worth a try.  I''ve tried
to_s on the
params (which btw are an integer), but i''m not even seeing the
"selected" option showing up in the html source.

Sorry for being so long winded, I want to insure I include enough
information to get this solved.

Any advice?

Thanks in advance
-- 
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On 6 Feb 2009, at 16:35, Steve Davie wrote:
>
> I''m getting murdered by this thing!  For the life of me, I
can''t
> figure
> it out.  I''ve spent literally days on google.
>
> Here''s what I would like to do (in rails 2.2.2):
>
>
> <% if params[:cruise_info] %>
> <%= collection_select :cabin_type, :cabin_type_id,
> CabinType.find_by_status(1).collect {|ct| ct}, :id, :name,  
> {:selected =>
> params[:cruise_info][:cabin_type_id]}%>
> <% end %>
collection_select ignore the :selected option.

Fred
>
>
> The intent here is, on re-rendering the page (after a validation
> failure), I don''t want the end-user to be required to make the  
> selection
> again.  I have half a dozen collection_selects in this form that are
> being returned from partials and are embeded with :fields_for, so
> they''re not automatically retaining their selections.
>
> Most of my search results are Bug reports for this, but they''re
more
> than 2 years old.  It''s gotta be fixed by now right? I have to be
> doing
> something wrong?  I just can''t see it.  I''ve tried using
select,
> options_from_collection_for_select, and have the same issue with all  
> of
> them.  I''ve tried different variations, like putting it in the
options
> => {} and in html_options => {}...and nothing.  I''ve tried
:selected,
> :selected_value, I even tried using :include_blank => {...}, which i
> knew wouldn''t work, but thought it worth a try.  I''ve
tried to_s on
> the
> params (which btw are an integer), but i''m not even seeing the
> "selected" option showing up in the html source.
>
> Sorry for being so long winded, I want to insure I include enough
> information to get this solved.
>
> Any advice?
>
> Thanks in advance
> -- 
> Posted via http://www.ruby-forum.com/.
>
> >

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On 6 Feb 2009, at 16:47, Frederick Cheung wrote:
>
> On 6 Feb 2009, at 16:35, Steve Davie wrote:
>
>>
>> I''m getting murdered by this thing!  For the life of me, I
can''t
>> figure
>> it out.  I''ve spent literally days on google.
>>
>> Here''s what I would like to do (in rails 2.2.2):
>>
>>
>> <% if params[:cruise_info] %>
>> <%= collection_select :cabin_type, :cabin_type_id,
>> CabinType.find_by_status(1).collect {|ct| ct}, :id, :name,  
>> {:selected =>
>> params[:cruise_info][:cabin_type_id]}%>
>> <% end %>
>
> collection_select ignore the :selected option.
>
should add that this will change in 2.3

Fred

> Fred
>
>>
>>
>> The intent here is, on re-rendering the page (after a validation
>> failure), I don''t want the end-user to be required to make the
>> selection
>> again.  I have half a dozen collection_selects in this form that are
>> being returned from partials and are embeded with :fields_for, so
>> they''re not automatically retaining their selections.
>>
>> Most of my search results are Bug reports for this, but
they''re more
>> than 2 years old.  It''s gotta be fixed by now right? I have to
be
>> doing
>> something wrong?  I just can''t see it.  I''ve tried
using select,
>> options_from_collection_for_select, and have the same issue with  
>> all of
>> them.  I''ve tried different variations, like putting it in the
>> options
>> => {} and in html_options => {}...and nothing.  I''ve
tried :selected,
>> :selected_value, I even tried using :include_blank => {...}, which i
>> knew wouldn''t work, but thought it worth a try.  I''ve
tried to_s on
>> the
>> params (which btw are an integer), but i''m not even seeing the
>> "selected" option showing up in the html source.
>>
>> Sorry for being so long winded, I want to insure I include enough
>> information to get this solved.
>>
>> Any advice?
>>
>> Thanks in advance
>> -- 
>> Posted via http://www.ruby-forum.com/.
>>
>> >>
>

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Frederick Cheung wrote:
> On 6 Feb 2009, at 16:47, Frederick Cheung wrote:
> 
>>>
>>> <% if params[:cruise_info] %>
>>> <%= collection_select :cabin_type, :cabin_type_id,
>>> CabinType.find_by_status(1).collect {|ct| ct}, :id, :name,  
>>> {:selected =>
>>> params[:cruise_info][:cabin_type_id]}%>
>>> <% end %>
>>
>> collection_select ignore the :selected option.
>>
> should add that this will change in 2.3
> 
> Fred
Thanks for the info Fred, but do you know of any convention for handling 
this kind of problem now?
-- 
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On 6 Feb 2009, at 16:55, Steve Davie wrote:
>
> Frederick Cheung wrote:
>> On 6 Feb 2009, at 16:47, Frederick Cheung wrote:
>>
>>>>
>>>> <% if params[:cruise_info] %>
>>>> <%= collection_select :cabin_type, :cabin_type_id,
>>>> CabinType.find_by_status(1).collect {|ct| ct}, :id, :name,
>>>> {:selected =>
>>>> params[:cruise_info][:cabin_type_id]}%>
>>>> <% end %>
>>>
>>> collection_select ignore the :selected option.
>>>
>> should add that this will change in 2.3
>
> Thanks for the info Fred, but do you know of any convention for  
> handling
> this kind of problem now?
You could just use a regular select. Or if the cabin_type_id attribute  
of the corresponding model object is set to params[:cruise_info] 
[:cabin_type_id] then it will just work.

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

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Frederick Cheung wrote:
> On 6 Feb 2009, at 16:55, Steve Davie wrote:
> 
>>>>> <% end %>
>>>>
>>>> collection_select ignore the :selected option.
>>>>
>>> should add that this will change in 2.3
>>
>> Thanks for the info Fred, but do you know of any convention for  
>> handling
>> this kind of problem now?
> 
> You could just use a regular select. Or if the cabin_type_id attribute
> of the corresponding model object is set to params[:cruise_info]
> [:cabin_type_id] then it will just work.
> 
> Fred
Thanks again Fred, I think I''ll have to just write out the selects.  I 
was hoping that maybe this was more common and there would be a
"rails"
solution for it.  The engineering of my forms must be out of whack with 
convention.  I''ll swing over to railscasts for a re-review of complex 
forms.
-- 
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I''m a little unsure as to what you want to do? Is it that you want a  
default value and then to retain their selected value? Or something  
else. I remember understanding collection select took me a while. It  
helps if you can do the HTML long hand once through to get clear about  
exactly what behaviour you want at first.

Blog: http://random8.zenunit.com/
Learn rails: http://sensei.zenunit.com/

On 07/02/2009, at 3:55 AM, Steve Davie <rails-mailing-list@andreas- 
s.net> wrote:
>
> Frederick Cheung wrote:
>> On 6 Feb 2009, at 16:47, Frederick Cheung wrote:
>>
>>>>
>>>> <% if params[:cruise_info] %>
>>>> <%= collection_select :cabin_type, :cabin_type_id,
>>>> CabinType.find_by_status(1).collect {|ct| ct}, :id, :name,
>>>> {:selected =>
>>>> params[:cruise_info][:cabin_type_id]}%>
>>>> <% end %>
>>>
>>> collection_select ignore the :selected option.
>>>
>> should add that this will change in 2.3
>>
>> Fred
>
> Thanks for the info Fred, but do you know of any convention for  
> handling
> this kind of problem now?
> -- 
> Posted via http://www.ruby-forum.com/.
>
> >
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if you have a form you can do:

f.collection_select :cabin_type_id, CabinType.find_by_status
(1).collect {|ct| ct}, :id, :name, :prompt => " -- Select -- "

and it should mantain the selected values.

Other way (because collection_select ignore the :selected option) I
would sugest you to use a select_tag in conjunction with options_for
select.
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I suggest that you buy and watch Forms screencasts by Ryan Bates
published by Pragmatic Programmers.  He explains proper use of
collection_select.  I have learned a lot by watching the screencasts.

http://www.pragprog.com/screencasts/v-rbforms/mastering-rails-forms

As per answering your question, I am also not sure of what is it that
you are trying to do?  If you are simply trying to set initial/
selected default value when creating/editing a record, then you should
be doing that in the controller action and not in the view.  Ryan
explains it very clearly in his screencasts.
Bharat

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