Fix `save` in `after_create_commit` won't invoke extra `after_create_commit`

Since a record is already persisted in `after_create_commit`, so `save`
should invoke only `after_update_commit`.

This bug is caused by depending on `@_start_transaction_state` for
rollback to consider whether it was `new_record` before being committed.

If after commit callbacks caused another commit, the state before
last commit is no longer `new_record`.

Fixes #32831.
Closes #18367.
Closes #31106.

1 files changed, 9 insertions, 0 deletions

diff --git a/activerecord/test/cases/transaction_callbacks_test.rb b/activerecord/test/cases/transaction_callbacks_test.rb
index 7c87030801..c0be45eee7 100644
--- a/activerecord/test/cases/transaction_callbacks_test.rb
+++ b/activerecord/test/cases/transaction_callbacks_test.rb
@@ -147,6 +147,15 @@ class TransactionCallbacksTest < ActiveRecord::TestCase
     assert_equal [:commit_on_destroy], new_record.history
   end
 
+  def test_save_in_after_create_commit_wont_invoke_extra_after_create_commit
+    new_record = TopicWithCallbacks.new(title: "New topic", written_on: Date.today)
+    add_transaction_execution_blocks new_record
+    new_record.after_commit_block(:create) { |r| r.save! }
+
+    new_record.save!
+    assert_equal [:commit_on_create, :commit_on_update], new_record.history
+  end
+
   def test_only_call_after_commit_on_create_and_doesnt_leaky
     r = ReplyWithCallbacks.new(content: "foo")
     r.save_on_after_create = true