Working With Rails

I’m trying to do a simple general form creator where i can just specify the table to create the form for, the controller/action wich will handle the submit and a small title, so far it works great, but only adds textfields.

My question is, is there a way to know if a column is a foreign key (other than checking if the field ends with ‘_id’. I want this so if the field is a foreign key i can present a drop down menu from the other table instead of the text field.

So far i have this…

Controller

class SharedController < ApplicationController def form_for @for = params:locals.camelize.constantize.new @cols = params:locals.camelize.constantize.column_names @ctrl = params:locals @action = params:locals @title = params:locals render(:partial=>‘form_for’) end
end

The view is actually a partial and looks like this
<%= @title %>

<% form_for @for, :url => { :controller => @ctrl, :action => @action } do |f| %> <% @cols.each do |c| %> <% if c != ‘id’ %> <%= f.label c %> <%= f.text_field c %>
<% end %> <% end %> <= f.submit “Guardar” %>
< end %>

And a example call to it is

<%=link_to_remote(”+”, :update => ‘form_div’, :url => { :controller=> ‘shared’,:action => ‘form_for’, :locals => { :title => ‘Idioma Nuevo’, :for => ‘language’, :ctrl => ‘params’,:action => ‘save_language’, }})%>

wich in that case will put the partial on a div.

any help would be apriciated, or comments on the way i’m doing this, first time using rails ^^