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-rw-r--r--activerecord/lib/active_record/attribute_methods/time_zone_conversion.rb3
1 files changed, 2 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/attribute_methods/time_zone_conversion.rb b/activerecord/lib/active_record/attribute_methods/time_zone_conversion.rb
index c9b2edbd8c..7abe29c7d5 100644
--- a/activerecord/lib/active_record/attribute_methods/time_zone_conversion.rb
+++ b/activerecord/lib/active_record/attribute_methods/time_zone_conversion.rb
@@ -42,8 +42,9 @@ module ActiveRecord
time = time.is_a?(String) ? Time.zone.parse(time) : time.to_time rescue time
end
time = time.in_time_zone rescue nil if time
+ changed = read_attribute(:#{attr_name}) != time
write_attribute(:#{attr_name}, original_time)
- #{attr_name}_will_change!
+ #{attr_name}_will_change! if changed
@attributes_cache["#{attr_name}"] = time
end
EOV