Rails - Jun 2006 - DRY up selects in view

Here''s what I''ve got:

<% @fields.each do |field_name| %>
  <tr>
    <td>
      <%= field_name.humanize %>
    </td>
    <td>
    <% unless field_name =~ /_id$/ %>
      <%= form.text_field field_name, :size => 40 %>
    <% else %>
      <%= select(:vendor,
            field_name,
            State.find(:all, :order => ''name'').collect {|p|
[ p.name,
p.id ] },
            :selected => @vendor.state.id ) %>
    <% end %>
    </td>
  </tr>
</end>

Right now this works great if I only have "state_id" as the related 
field_name.  I could repeat this for every field_name ending in "_id",
but that''s not DRY.

I''d like to allow this to work for any field_names ending in
"_id" but I
need to use the field_name without the "_id" and capitalized as the 
class name.  I know I''m thinking about this from a scripting POV, but 
can I get this done?

Is there a better way to do this?

Thanks,
Bill

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

Hello Bill,
> Here''s what I''ve got:
>
> <% @fields.each do |field_name| %>
>   <tr>
>     <td>
>       <%= field_name.humanize %>
>     </td>
>     <td>
>     <% unless field_name =~ /_id$/ %>
>       <%= form.text_field field_name, :size => 40 %>
>     <% else %>
>       <%= select(:vendor,
>             field_name,
>             State.find(:all, :order => ''name'').collect
{|p| [ p.name,
> p.id ] },
>             :selected => @vendor.state.id ) %>
>     <% end %>
>     </td>
>   </tr>
> </end>
>
> Right now this works great if I only have "state_id" as the
related
> field_name.  I could repeat this for every field_name ending in
"_id",
> but that''s not DRY.
>
> I''d like to allow this to work for any field_names ending in
"_id" but I
> need to use the field_name without the "_id" and capitalized as
the
> class name.  I know I''m thinking about this from a scripting POV,
but
> can I get this done?
# field_name = "state_id"
...
class_name = field_name.gsub(/_id$/, '''').camelcase
# => "State"
...
class_name.constantize.find :all ...
# => State.find :all ...
...
@vendor.send(class_name.underscore.to_sym)
# => @vendor.state
> Is there a better way to do this?
Not tested, but you get the idea to create your helper.

bye,

   -- Jean-Fran?ois.

-- 
? la renverse.

Tested and works.  Thanks for the help.  I''m not sure about the last 
step though.    Why class_name.underscore ?

Bill

-- 
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