how to create an association through a Drag & Drop

rubyonrails-talk
1

I have 3 tables A, B and C

Table A has_many Cs Table B has_many Cs so C contains 2 foreign keys, A_id and B_id)

I have a screen with 2 lists : A list and B list I would like to be able to create a C record by simply dropping an A element on a B element

I tried this :

<ul id="A_list">   <% for A in @As %>   <% draggableA_id = "draggableA_#{A.id}" %>   <li id=<%= draggableA_id %> class="draggableAs">      <% A.name %>         </li>         <%= draggable_element(draggableA_id, :revert=>true) %>   <% end %> </ul>

<ul id="B_list">   <% for B in @Bs %>        <% droppableB_id = "droppableB_#{B.id}" %>        <li id=<%= droppableB_id %> class="droppableBs">            <%= B.name %>       </li>       <%= drop_receiving_element(droppableB_id,       :accept => "draggableAs",       :with => "'draggableA=' + (element.id.split('_').last())",       :url => {:action=>:create_C}       )%>   <% end %> </ul>

It drops OK, but : 1) The problem is, the ":with" parameter takes only one key. How do I convey the second one ? It doesn't seem to accept a hash... 2) When I debug, I see that the draggableA_id that I drop is always the last draggableA_id, whichever draggableA I drag...

2

There's some examples of the usage of :with here:

(it's mostly about link_to_remote but that doesn't matter)

Fred