From be0cfc07ec13d6f72a3ee95999053fe61aa93da1 Mon Sep 17 00:00:00 2001
From: Shutkov Maksim <shutkov.maksim@mail.ru>
Date: Wed, 9 Sep 2015 21:04:34 +0300
Subject: [PATCH] Improved cascade updae tree

---
 Gemfile.lock          | 3 ---
 lib/pg_ltree/ltree.rb | 6 ++++--
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/Gemfile.lock b/Gemfile.lock
index 0e7e4cc..3f72c1b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -106,6 +106,3 @@ PLATFORMS
 DEPENDENCIES
   pg_ltree!
   yard
-
-BUNDLED WITH
-   1.10.5
diff --git a/lib/pg_ltree/ltree.rb b/lib/pg_ltree/ltree.rb
index fc285f7..f9ead46 100644
--- a/lib/pg_ltree/ltree.rb
+++ b/lib/pg_ltree/ltree.rb
@@ -191,8 +191,10 @@ def children
       #
       # @return [ActiveRecord::Relation]
       def cascade_update
-        ltree_scope.where(["#{ltree_path_column} <@ ?", ltree_path_was]).where(["#{ltree_path_column} != ?", ltree_path]).
-        update_all ["#{ltree_path_column} = ? || subpath(#{ltree_path_column}, nlevel(?))", ltree_path, ltree_path_was]
+        if ltree_path_was.include? self.id.to_s
+          ltree_scope.where(["#{ltree_path_column} <@ ?", ltree_path_was]).where(["#{ltree_path_column} != ?", ltree_path]).
+          update_all ["#{ltree_path_column} = ? || subpath(#{ltree_path_column}, nlevel(?))", ltree_path, ltree_path_was]
+        end
       end
 
       # Delete all children for current path