Hi, I have 2 models: Model 1: er, Columns: <er_id, er_name> Model 2: er_process, Columns: <er_id, er_process_name> er_id is a foreign key for Model 2. When I am creating a new er_process or editing an existing one, I have been successful to use collection_select to show the available er''s so that the user can select a particular er by its name (to populate the er_id field of er_process), like this: <% form_tag({:action => ''create''}) do -%> <label for="er_id">ER ID: </label> <%= collection_select ("er_process", "er_id", Er.find(:all), "er_id", "er_name") %> ... <% end %> But I have failed to do a similar thing in my list.rhtml page for er_process. What I need is, provide the user with a ''filter'' so that only the listing (of er_process) with a particular er_id is shown, based on what the user has selected as ''er_id''. I used this in my list.rhtml: <% form_tag({:action => ''search''}) do -%> <%= collection_select ("er_process", "er_id", Er.find(:all), "er_id", "er_name") %> <%= submit_tag(''Filter by ER'') %> ... <% end %> (I have a method ''search'' in my controller that works fine). The above is not working, giving me the error: undefined method `er_id'' for #<Array:0x4a78178> To my surprise, a text_field_tag is working: <%= text_field_tag :er_id, @er_id, :size => 1 %> But this doesn''t fulfill my need as I want the user to select from a drop-down-list (using collection_select). Could anybody please help? Thanks. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Spinoffs" group. To post to this group, send email to rubyonrails-spinoffs-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-spinoffs-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-spinoffs?hl=en -~----------~----~----~----~------~----~------~--~---