Transaction behavior with context

[stasvo]

I have question about transaction with context while use GORM with postgresql.
I didn't found documentation about case if will be created transaction with context and after it will be closed context before make request. In this case will be request executed without errors, or there will happen error and will be need to call rollback in manual way or there will happen auto rollback?

For example in pgx which use gorm in documentation exists information that the context only affects the begin command. i.e. there is no auto-rollback on context cancellation, but how its works in gorm unfortunatelly I didnt found.

Example:

ctx, cancel := context.WithCancel(context.Background())
tx := db.WithContext(ctx).Begin()

err = tx.Create(&user1).Error
if err != nil {
	log.Println(err)
	return
}

cancel()

err = tx.Create(&user2).Error
if err != nil {
	log.Println(err)
	return
}

//some code here