harumph, inverse doesn't seem to fix it. :\

Author: mceachen

lib/closure_tree/model.rb

@@ -7,7 +7,8 @@ module Model
     included do
       belongs_to :parent,
         :class_name => _ct.model_class.to_s,
-        :foreign_key => _ct.parent_column_name
+        :foreign_key => _ct.parent_column_name,
+        :inverse_of => :children
 
       attr_accessible :parent if _ct.use_attr_accessible?
 
@@ -16,7 +17,9 @@ module Model
       has_many :children, *_ct.has_many_with_order_option(
         :class_name => _ct.model_class.to_s,
         :foreign_key => _ct.parent_column_name,
-        :dependent => _ct.options[:dependent])
+        :dependent => _ct.options[:dependent],
+        :inverse_of => :parent)
+
 
       has_many :ancestor_hierarchies, *_ct.has_many_without_order_option(
         :class_name => _ct.hierarchy_class_name,

spec/label_spec.rb

@@ -84,6 +84,17 @@ def create_preorder_tree(suffix = "")
     end
   end
 
+  context "Parent/child inverse relationships" do
+    it "should associate both sides of the parent and child relationships" do
+      parent = Label.new(:name => '123')
+      child = parent.children.build
+      parent.should be_root
+      parent.should_not be_leaf
+      child.should_not be_root
+      child.should be_leaf
+    end
+  end
+
   context "DateLabel" do
     it "should find or create by path" do
       date = DateLabel.find_or_create_by_path(%w{2011 November 23})