Merge pull request #3544 from amatsuda/_field_changed

Rename field_changed? to _field_changed? so that users can create a field named field
Conflicts:

	activerecord/lib/active_record/core.rb
	activerecord/test/cases/dirty_test.rb

1 files changed, 3 insertions, 3 deletions

diff --git a/activerecord/lib/active_record/attribute_methods/dirty.rb b/activerecord/lib/active_record/attribute_methods/dirty.rb
index ed863a9696..9cd8954496 100644
--- a/activerecord/lib/active_record/attribute_methods/dirty.rb
+++ b/activerecord/lib/active_record/attribute_methods/dirty.rb
@@ -55,12 +55,12 @@ module ActiveRecord
         # The attribute already has an unsaved change.
         if attribute_changed?(attr)
           old = @changed_attributes[attr]
-          @changed_attributes.delete(attr) unless field_changed?(attr, old, value)
+          @changed_attributes.delete(attr) unless _field_changed?(attr, old, value)
         else
           old = clone_attribute_value(:read_attribute, attr)
           # Save Time objects as TimeWithZone if time_zone_aware_attributes == true
           old = old.in_time_zone if clone_with_time_zone_conversion_attribute?(attr, old)
-          @changed_attributes[attr] = old if field_changed?(attr, old, value)
+          @changed_attributes[attr] = old if _field_changed?(attr, old, value)
         end
 
         # Carry on.
@@ -77,7 +77,7 @@ module ActiveRecord
         end
       end
 
-      def field_changed?(attr, old, value)
+      def _field_changed?(attr, old, value)
         if column = column_for_attribute(attr)
           if column.number? && (changes_from_nil_to_empty_string?(column, old, value) ||
                                 changes_from_zero_to_string?(old, value))