[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-3334) Cascade-save breaks if parent ID is assigned (delays insert) and child has identity ID (early insert)

[Gail Badner (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-3334?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=37846#action_37846 ] 

Gail Badner commented on HHH-3334:
----------------------------------

I've added a FailureExpected test that reproduces this issue in Branch_3_5 and trunk:
org.hibernate.test.cascade.CascadeTestWithAssignedParentIdTest.testSaveChildWithParentFailureExpected()

> Cascade-save breaks if parent ID is assigned (delays insert) and child has identity ID (early insert)
> -----------------------------------------------------------------------------------------------------
>
>                 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
>            Assignee: Gail Badner
>         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;

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