Dirty solution for active model 4.1

Gemfile

@@ -3,6 +3,7 @@ source "http://rubygems.org"
 
 gem 'rake', '~> 0.8.7'
 gem 'rspec', '~> 2.4.0'
-gem 'activesupport', '~> 3.2.0'
-gem 'activemodel', '~> 3.2.0'
+gem 'activesupport', '~> 4.1.0'
+gem 'activemodel', '~> 4.1.0'
+gem 'method_source'
 # gem 'ruby-debug'

lib/grouped_validations.rb

@@ -1,5 +1,6 @@
 require 'active_model/validations'
 require 'grouped_validations/active_model'
+require 'grouped_validations/callback'
 
 module GroupedValidations
   extend ActiveSupport::Concern
@@ -29,7 +30,7 @@ def validate(*args, &block)
     end
 
     def _define_group_validation_callbacks(group)
-      define_callbacks :"validate_#{group}", :scope => 'validate'
+      define_callbacks :"validate_#{group}", scope: :callback_method, callback_method: :validate
     end
 
   end
@@ -45,9 +46,11 @@ def valid?(context=nil)
   def groups_valid?(*groups)
     options = groups.extract_options!
     errors.clear
-    groups.each do |group|
-      raise "Validation group '#{group}' not defined" unless validation_groups.include?(group)
-      _run_group_validation_callbacks(group, options[:context])
+    with_validation_context(options[:context]) do
+      groups.each do |group|
+        raise "Validation group '#{group}' not defined" unless validation_groups.include?(group)
+        run_callbacks("validate_#{group}")
+      end
     end
     errors.empty?
   end
@@ -59,12 +62,12 @@ def grouped_errors(context=nil)
     grouped = {}
 
     with_validation_context(context) do
-      _run_validate_callbacks
+      run_callbacks(:validate)
       grouped[nil] = errors
 
       validation_groups.each do |group|
         @errors = nil
-        send(:"_run_validate_#{group}_callbacks")
+        run_callbacks("validate_#{group}")
         grouped[group] = errors
       end
     end
@@ -75,7 +78,7 @@ def grouped_errors(context=nil)
 
   def _run_group_validation_callbacks(group, context=nil)
     with_validation_context(context) do
-      send(:"_run_validate_#{group}_callbacks")
+      run_callbacks("validate_#{group}")
     end
   end
 

lib/grouped_validations/callback.rb

@@ -0,0 +1,5 @@
+class ActiveSupport::Callbacks::Callback
+  def callback_method
+    chain_config[:callback_method]
+  end
+end