Hi,
i have 2 dropdowns which are dependent from each other: ItemCategory has many ItemGroups
if u use the same code in a form where i specify the action within the form header, everything is good and i recieve the id from the params-tag. But it is no tworking out of that observer - WHY? params is always NIL!!! If i debug it in FFBug, i can see the correct POST-Value...
I expect you'll find that the parameter simply doesn't have the name you expect. Look at the api examples and you'll see that if you pass :with => 'something' to observe_field then the observed value is stored at params[:something]. Can't remember off the top of my head what the parameter name will be if you don't specify :with (possibly just params[:value], but definitely not params[:x][:id])
Fred