From cb847b9f2e56eeff737323d9a42a2a0a6c23804d Mon Sep 17 00:00:00 2001 From: Godfrey Chan Date: Mon, 21 May 2012 14:57:04 -0700 Subject: Restore the frozen state on rollback. Fixes #6417. Currently, when saving a frozen record, an exception would be thrown which causes a rollback. However, there is a bug in active record that "defrost" the record as a side effect: >> t = Topic.new => # >> t.freeze => # >> t.save RuntimeError: can't modify a frozen Hash >> t.frozen? => false >> t.save => true This patch fixes the bug by explictly restoring the frozen state on the attributes Hash after every rollback. --- activerecord/lib/active_record/transactions.rb | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'activerecord/lib') diff --git a/activerecord/lib/active_record/transactions.rb b/activerecord/lib/active_record/transactions.rb index 30e1035300..9cb9b4627b 100644 --- a/activerecord/lib/active_record/transactions.rb +++ b/activerecord/lib/active_record/transactions.rb @@ -329,7 +329,8 @@ module ActiveRecord @_start_transaction_state[:level] = (@_start_transaction_state[:level] || 0) - 1 if @_start_transaction_state[:level] < 1 restore_state = remove_instance_variable(:@_start_transaction_state) - @attributes = @attributes.dup if @attributes.frozen? + was_frozen = @attributes.frozen? + @attributes = @attributes.dup if was_frozen @new_record = restore_state[:new_record] @destroyed = restore_state[:destroyed] if restore_state.has_key?(:id) @@ -338,6 +339,7 @@ module ActiveRecord @attributes.delete(self.class.primary_key) @attributes_cache.delete(self.class.primary_key) end + @attributes.freeze if was_frozen end end end -- cgit v1.2.3