Show by reference

[HenriIV]

Hi,

I'm trying to apply DRY concept so when I want to display an product for example, I have /article/show/2 using the id to retrieve data. But if I want to use the same action with a reference field instead of id, what should I do?

I'm using a form, so I display the ref in the select box sending the id

<%= start_form_tag :controller => 'product', :action => 'show' %>
    <p>Ref.:<%= collection_select("product", "id", @references, "id", "reference") %>
<%= submit_tag "search" %></p> 

the source page seems ok too

<option value="11">IPA235</option> 

but it doesn't work, I still get Couldn't find Product without an ID

Did I forget something?

[HenriIV]

I should have asked differently:

in order to work, my action must look like this

  def show
    @hotel = Hotel.find(params[:hotel][:id])
  end 

because post sends data in an hash

but when I use get method to access the same page, I must use

  def show
    @hotel = Hotel.find(params[:id])
  end 

I would like to avoid to add a different template / action to do exactly the same thing. Is there a smart way to do this?

[HenriIV]

I fixed it doing something like that:

if params[:hotel].nil?
      @id = params[:id]
else
      @id = params[:hotel][:id]
end 

is there a better way to do this?

[Luke Redpath]

Slightly more concise:

@id = params[:hotel] ? params[:hotel][:id] : params[:id]