diff --git a/app/assets/javascripts/backbone-nested-attributes/model.js b/app/assets/javascripts/backbone-nested-attributes/model.js
index 7a7554c..8f275ea 100644
--- a/app/assets/javascripts/backbone-nested-attributes/model.js
+++ b/app/assets/javascripts/backbone-nested-attributes/model.js
@@ -47,6 +47,8 @@
       nested.set(value)
     }
 
+    nested.parentModel = model
+
     if (deletedValue) {
       delete attributes['deleted_' + key]
 
@@ -67,7 +69,7 @@
     _(model.relations).each(function (relation) {
       var collectionOrModel = model.get(relation.key)
 
-      if (collectionOrModel.each) {
+      if (collectionOrModel && collectionOrModel.each) {
         collectionOrModel.each(function (nestedModel) {
           clearDeletedModelsFor(nestedModel)
         })
@@ -200,6 +202,10 @@
     clear: function (options) {
       clearNestedEvents(this)
       return BackboneModelPrototype.clear.apply(this, arguments)
-    }
+    },
+
+    parentModel: function() {
+       return this.collection.parentModel
+    },
   })
 })(Backbone, _)
diff --git a/backbone-nested-attributes.gemspec b/backbone-nested-attributes.gemspec
index cf0d455..20593df 100644
--- a/backbone-nested-attributes.gemspec
+++ b/backbone-nested-attributes.gemspec
@@ -16,5 +16,5 @@ Gem::Specification.new do |gem|
   gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})
   gem.require_paths = ["lib"]
 
-  gem.add_dependency "rails", "~> 3.2.8"
+  gem.add_dependency "rails", ">= 3.2.8"
 end