rails_ext.rb in damagecontrol-0.5.0.1404

- old
+ new

@@ -28,10 +28,17 @@
   #
   def find_selected(name)
     array = instantiate_array_from_hashes(@params[name])
     selected = @params["#{name}_selected"]
     selected_object = array.find { |o| o.class.name == selected }
+    unless selected_object
+      Log.error "No selected object among '#{name}'"
+      Log.error "params: #{@params[name].inspect}"
+      Log.error "array: #{array.inspect}"
+      Log.error "selected: #{selected}"
+      raise "No selected object found. See log for details."
+    end
     def selected_object.selected?
       true
     end
     selected_object
   end
@@ -198,9 +205,12 @@
             html_value = text_or_input(edit, :name => "#{collection_name}[#{o.class.name}][#{attr_name}]", :value => attr_value)
             r << "    <td width='75%'>#{html_value}</td>\n"
             r << "  </tr>\n"
           end
         end
+        # workaround for RoR bug. 'hash' form params must have at least one value.
+        r << "<tr><td></td><td><input type='hidden' name ='#{collection_name}[#{o.class.name}][__dummy]'></td></tr>" if o.instance_variables.empty?
+
         r << "</table>"
         r
       end
     end
 