[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-3334) Cascading breaks if parent table doesn't have Auto-inc

Cascading breaks if parent table doesn't have Auto-inc ------------------------------------------------------ Key: HHH-3334 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3334 Project: Hibernate Core Issue Type: Bug Components: core Affects Versions: 3.2.4.sp1, 3.2.5, 3.2.6, 3.3.0.CR1 Environment: tested on MySql, and hibernate versions (with annotations) v3.2.4 to 3.3.0CR1 Reporter: Wallace Wadge Attachments: AbstractSaveEventListener.java, brokenCascade.zip (reposting here from forum) Consider: - a table with an assigned PK (i.e. not auto-increment), let's call this "A" - Another table ("B") linked to the table listed above but with it's PK set to auto-increment. Now if you try to save B with cascading switched on, it will break. From the little debugging I've done it looks like: a) hibernate detects that A needs to be saved first, but puts it into some sort of queue. b) when it hits B, it short-circuits this save queue and tries to save B immediately so as to obtain a PK reference for B. This fails since A hasn't been yet been saved so it's link is still null. Schema used is listed below (MySQL): ---- CREATE DATABASE `jira` /*!40100 DEFAULT CHARACTER SET latin1 */; DROP TABLE IF EXISTS `jira`.`parent`; CREATE TABLE `jira`.`parent` ( `parent_id` int(10) unsigned NOT NULL, PRIMARY KEY (`parent_id`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1; DROP TABLE IF EXISTS `jira`.`child`; CREATE TABLE `jira`.`child` ( `child_id` int(10) unsigned NOT NULL auto_increment, `parent_id` int(10) unsigned NOT NULL, PRIMARY KEY (`child_id`), KEY `FK_child_1` (`parent_id`), CONSTRAINT `FK_child_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`parent_id`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1;