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-rw-r--r--activerecord/lib/active_record/integration.rb2
-rw-r--r--activerecord/lib/active_record/timestamp.rb6
2 files changed, 7 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/integration.rb b/activerecord/lib/active_record/integration.rb
index 32d35f0ec1..48c73d7781 100644
--- a/activerecord/lib/active_record/integration.rb
+++ b/activerecord/lib/active_record/integration.rb
@@ -49,7 +49,7 @@ module ActiveRecord
case
when new_record?
"#{self.class.model_name.cache_key}/new"
- when timestamp = self[:updated_at]
+ when timestamp = max_updated_column_timestamp
timestamp = timestamp.utc.to_s(cache_timestamp_format)
"#{self.class.model_name.cache_key}/#{id}-#{timestamp}"
else
diff --git a/activerecord/lib/active_record/timestamp.rb b/activerecord/lib/active_record/timestamp.rb
index 8ded6d4a86..ae99cff35e 100644
--- a/activerecord/lib/active_record/timestamp.rb
+++ b/activerecord/lib/active_record/timestamp.rb
@@ -98,6 +98,12 @@ module ActiveRecord
timestamp_attributes_for_create + timestamp_attributes_for_update
end
+ def max_updated_column_timestamp
+ if (timestamps = timestamp_attributes_for_update.map { |attr| self[attr] }.compact).present?
+ timestamps.map { |ts| ts.to_time }.max
+ end
+ end
+
def current_time_from_proper_timezone
self.class.default_timezone == :utc ? Time.now.utc : Time.now
end