Rails - Oct 2010 - How to Pass a Selected Option Value of select_tag from One Partial to Another

Hi,

I''m running Rails 2.3.5 & Ruby 1.8.7 on Windows XP.

I have two partials:
1. File app\views\warehousing\_index.html.erb has
      .....
      <%= select_tag(:filter_by_category, "<option>-Select a
category-
</option>" +
 
options_from_collection_for_select(Categories.find(:all, :order =>
''name''), :name, :name)) %>
      .....
      <%= render :partial => ''warehousing/entry'',
:locals =>
{:filter_by_category => "Hello World"} %>
      .....
2. File app\views\warehousing\_entry.html.erb has
      .....
      <div>Selected category is <%= filter_by_category
%></div>
      .....

On the displayed page, it shows:

      Selected category is Hello World

That means the string "Hello World" in variable filter_by_category is
indeed passed from one partial to the other.  For my project, I want
to pass the selected option value from the select_tag to partial
_entry.html.erb, i.e. in file _entry.html.erb, for line
    <%= render :partial => ''warehousing/entry'', :locals
=>
{:filter_by_category => ???} %>
what should I put in for "???".

Thanks for any help that you could offer.
Hoca

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Hoca wrote in post #955056:
> Hi,
>
> I''m running Rails 2.3.5 & Ruby 1.8.7 on Windows XP.
Why on earth are you doing Rails development on Windows?  At least get a 
*nix VM.
>
> I have two partials:
> 1. File app\views\warehousing\_index.html.erb has
>       .....
>       <%= select_tag(:filter_by_category, "<option>-Select a
category-
> </option>" +
>
> options_from_collection_for_select(Categories.find(:all, :order =>
> ''name''), :name, :name)) %>
>       .....
>       <%= render :partial => ''warehousing/entry'',
:locals =>
> {:filter_by_category => "Hello World"} %>
>       .....
> 2. File app\views\warehousing\_entry.html.erb has
>       .....
>       <div>Selected category is <%= filter_by_category
%></div>
>       .....
>
> On the displayed page, it shows:
>
>       Selected category is Hello World
>
> That means the string "Hello World" in variable
filter_by_category is
> indeed passed from one partial to the other.  For my project, I want
> to pass the selected option value from the select_tag to partial
> _entry.html.erb, i.e. in file _entry.html.erb, for line
>     <%= render :partial => ''warehousing/entry'',
:locals =>
> {:filter_by_category => ???} %>
> what should I put in for "???".
It''s not possible, because at the time the partial is rendered, the
user
has not yet had a chance to select anything -- that is, by the time the 
user sees the page in the browser, _entry has already been rendered and 
it is now too late to change it.

Therefore, you''d need to use Ajax to send a request to the server which
would re-render _entry when a new category is selected.
>
> Thanks for any help that you could offer.
> Hoca
Best,
--
Marnen Laibow-Koser
http://www.marnen.org
marnen-sbuyVjPbboAdnm+yROfE0A@public.gmane.org

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Hi Marnen,

Thanks so much for your suggestion.  I''ll try another approach then.

Hoca.

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