more work to make nested sortable forms work, can now sort forms within forms

app/assets/javascripts/cocoon.js

@@ -7,6 +7,9 @@
     content.replace(reg_exp, with_str);
   }
 
+  $.fn.parentSiblings = function(selector) {
+    return $(this).parent().siblings(selector);
+  }
 
   $('.add_fields').live('click', function(e) {
     e.preventDefault();

app/assets/javascripts/cocoon/ordered.js

@@ -1,29 +1,88 @@
 //= require jquery-ui
 //
 (function($) {
-  $(function() {
-    $('li[data-ordered_by]').each(function(index, element) {
-      var field = $(element).data('ordered_by');
-      var fieldSearch = "[name*='[" + field + "]']"
-
-      $(element).sortable({
-        items: '.nested-fields',
+  $.cocoon = {
+    ordered: {
+      options: {
+        items: '> .nested-fields',
         stop: function(e, ui) {
-          $(element).find(fieldSearch).each(function(index, element) {
-            $(element).val(index);
-          });
+          if (window.CKEDITOR) {
+            var editors = $(ui.item).data('cocoon_ckeditors');
+            var i, j;
+
+            for (i = 0, j = editors.length; i < j; ++i) {
+              var id = editors[i];
+              var editor = CKEDITOR.instances[id];
+
+              if (editor) {
+                editor.destroy(true);
+                CKEDITOR.remove(id);
+              }
+
+              CKEDITOR.replace(id);
+            }
+
+            $(ui.item).data('cocoon_ckeditors', []);
+          }
+
+          $.cocoon.ordered._updateFields(this)
+        },
+        start: function(e, ui) {
+          if (window.CKEDITOR) {
+            var editors = [];
+
+            $(ui.item).find('textarea').each(function(index, element) {
+              var id = $(element).attr('id');
+              var editor = CKEDITOR.instances[id];
+              if (editor) {
+                editors.push(id);
+
+                editor.destroy();
+                CKEDITOR.remove(id);
               }
             });
 
-      $(element).bind('cocoon:after-insert', function(e, node) {
+            $(ui.item).data('cocoon_ckeditors', editors);
+          }
+        }
+      },
+      _updateFields: function(element) {
+        console.log(element)
+        console.log($(element).data('fieldSearch'))
+        console.log($(element).find($(element).data('fieldSearch')))
+
+        $(element).find($(element).data('fieldSearch')).each(function(index, element) {
+          $(element).val(index);
+        });
+      },
+      setup: function() {
+        $('li[data-ordered_by]').each(function(index, element) {
+          var field = $(element).data('ordered_by');
+          var fieldSelector = "[name*='[" + field + "]']"
+          var fieldGroupSelector = "> .forms > .nested-fields"
+          var orderFieldSelector = "> .nested-fields " + fieldSelector;
+          var fieldSearch = "> .forms " + orderFieldSelector;
+
+          $(element).find('.forms').data('fieldSearch', orderFieldSelector).sortable($.cocoon.ordered.options);
+
+          $(element).unbind('cocoon:after-insert').bind('cocoon:after-insert', function(e, node) {
             var nextOrder = 0;
 
+            if ($(element).find(fieldGroupSelector).is(node)) {
               $(element).find(fieldSearch).each(function() {
-          nextOrder = Math.max(nextOrder, Number($(this).val()) + 1);
+                nextOrder = Math.max(nextOrder, Number($(this).val()));
               });
 
-        $(node).find(fieldSearch).val(nextOrder)
-      });
+              $(node).find(fieldSelector).val(nextOrder + 1)
+            }
           });
         });
+
+        $(document).on('cocoon:after-insert', function() { $.cocoon.ordered.setup(); });
+      }
+    },
+  };
+
+  $(function() { $.cocoon.ordered.setup(); });
 })(jQuery);
+

app/assets/stylesheets/cocoon/active_admin.css.scss

@@ -19,7 +19,7 @@ li.cocoon {
     @extend .button;
   }
 
-  &.ui-sortable {
+  .forms.ui-sortable {
     fieldset {
       border-top: solid #777 12px;
       cursor: move;

lib/cocoon/formtastic/cocoon_input.rb

@@ -4,7 +4,7 @@ class CocoonInput
   include ::Formtastic::Inputs::Base
 
   def to_html
-    output = label_html << semantic_fields_for << links
+    output = label_html << wrapped_semantic_fields << links
 
     template.content_tag(:li, output.html_safe, wrapper_html_options)
   end
@@ -26,10 +26,22 @@ class CocoonInput
     end
   end
 
+  def wrapped_semantic_fields
+    template.content_tag(:div, semantic_fields_for, :class => 'forms')
+  end
+
   def links
     template.content_tag(:div, :class => 'links') do
       template.link_to_add_association template.t('.add'), builder, method, input_html_options
     end
   end
+
+  def input_html_options
+    super.merge(
+      'data-association-insertion-node' => '.forms',
+      'data-association-insertion-traversal' => 'parentSiblings',
+      'data-association-insertion-method' => 'append'
+    )
+  end
 end