working ember... again

app/models/table.rb

@@ -12,7 +12,7 @@ class Table
   has_many :lists
 
   attr_protected :supplier_id
-  attr_accessor :active_list_id
+  attr_accessor :active_list_id, :active_list
 
   validates :supplier_id, presence: true
   #validates :list_id, presence: true
@@ -68,9 +68,20 @@ class Table
   end
 
   def active_list
+    # nil memoizing
+    return @active_list if @active_list_is_set
     @active_list ||= self.class.database.view(List.active_by_table_id_view(key: id, include_docs: true, reduce: false, limit: 1)).try(:first)
   end
 
+  def active_list=(val)
+    @active_list_is_set = true
+    @active_list = val
+  end
+
+  def active_list_id
+    @active_list_id || active_list.try(:id)
+  end
+
   def reserved?
     false
   end