Rails drag and drop with scriptaculous

From here:

View:

<% element_to_drag_id = "item_#{item.id}" %>
<div id=<%= element_to_drag_id %> class='mydrop'>

Whatever
</div>
<%= draggable_element(element_to_drag_id, :revert=>true) %>

<% element_to_drop_id = "receiver" %>
<div id=<%= element_to_drop_id %> >
Whatever else
</div>

<%= drop_receiving_element(element_to_drop_id,  # The id of the receiving element
  :accept => "mydrop",                          # The CSS class of the dropped element
  :with   => "'dropid=' + (element.id.split('_').last())", # The query string parameters
  :url    => {:action=> 'dropped'}              # The action to call
)%> 

Controller:
Do whatever you need. The id is passed in params[:dropid]. See views/keywords/_show_key.html.erb and controllers/keyword_controller.rb for illustration of how to use it.

Note:
There is an issue with dragging and dropping across divs that have overflow:auto on
[1],[2]

This can be fixed by setting :ghosting=>true in the draggable.