From 64ea41cbcde6a131a6bb589746e8a713fee1879c Mon Sep 17 00:00:00 2001
From: Didier Lafforgue <didier@nocoffee.fr>
Date: Thu, 5 Apr 2012 18:01:16 +0200
Subject: [PATCH] one way to avoid autosave

---
 .../locomotive/extensions/page/fullpath.rb    | 12 +++++++++-
 app/models/locomotive/extensions/page/tree.rb |  4 ++++
 lib/locomotive/mongoid/patches.rb             | 24 +++++++++++++++++++
 3 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/app/models/locomotive/extensions/page/fullpath.rb b/app/models/locomotive/extensions/page/fullpath.rb
index b861c4f3..de6e01d9 100644
--- a/app/models/locomotive/extensions/page/fullpath.rb
+++ b/app/models/locomotive/extensions/page/fullpath.rb
@@ -16,6 +16,7 @@ module Locomotive
           before_validation :get_wildcards_from_parent
           before_validation :add_slug_to_wildcards
           before_save       :build_fullpath
+          before_save       :set_children_autosave
           # before_rearrange  :foo #propagate_fullpath_changes
           # after_save        :propagate_fullpath_changes
 
@@ -61,6 +62,11 @@ module Locomotive
 
         protected
 
+        def set_children_autosave
+          @autosave_for_children = !must_propagate_fullpath_changes?
+          true
+        end
+
         def get_wildcards_from_parent
           return true if self.parent.nil?
 
@@ -88,8 +94,12 @@ module Locomotive
           end
         end
 
+        def must_propagate_fullpath_changes?
+          self.wildcard_changed? || self.slug_changed?
+        end
+
         def propagate_fullpath_changes
-          return true unless self.wildcard_changed? || self.slug_changed?
+          return true unless must_propagate_fullpath_changes?
 
           parent_identities = { self._id => self }
 
diff --git a/app/models/locomotive/extensions/page/tree.rb b/app/models/locomotive/extensions/page/tree.rb
index a1f97fa4..ec765428 100644
--- a/app/models/locomotive/extensions/page/tree.rb
+++ b/app/models/locomotive/extensions/page/tree.rb
@@ -74,6 +74,10 @@ module Locomotive
 
         end
 
+        def autosave_for_children?
+          @autosave_for_children != false
+        end
+
         # Returns the children of this node but with the minimal set of required attributes
         #
         # @return [ Array ] The children pages ordered by their position
diff --git a/lib/locomotive/mongoid/patches.rb b/lib/locomotive/mongoid/patches.rb
index f0ce3fce..a2e43b4f 100644
--- a/lib/locomotive/mongoid/patches.rb
+++ b/lib/locomotive/mongoid/patches.rb
@@ -12,6 +12,28 @@ module Mongoid#:nodoc:
     end
   end
 
+  module Relations #:nodoc:
+    module AutoSave
+      module ClassMethods #:nodoc:
+        def autosave(metadata)
+          if metadata.autosave?
+            set_callback :save, :after do |document|
+              relation = document.send(metadata.name)
+
+              return true if document.try(:"autosave_for_#{metadata.name}?") == false # FIXME (Didier L.) add more control on the document side
+
+              if relation
+                (relation.do_or_do_not(:in_memory) || Array.wrap(relation)).each do |doc|
+                  doc.save
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+
   module Fields #:nodoc:
     module Internal #:nodoc:
       class RawArray < Mongoid::Fields::Internal::Array
@@ -59,3 +81,5 @@ module Mongoid#:nodoc:
   end
 
 end
+
+