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JavaRanch » Java Forums » Databases » Object Relational Mapping
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Whats wrong with the code ?

Nikhil Jain
Ranch Hand

Joined: May 15, 2005
Posts: 385


What is the problem with the above code? The enties works well when I try to persist them in isolation. I am trying to persister these objects in a single trasaction.

There is no problem with the database, as it works well when executed by persisting the objects one by one ...


SCJP 1.4, SCWCD 1.4, SCBCD 1.5
Mike Keith
author
Ranch Hand

Joined: Jul 14, 2005
Posts: 304
1) Bad karma to access the EM from within the entity class.

2) Your relationship is not properly mapped. Try this:


3. You should probably set the id in employee to not be generated so you can assign it when you create one and then use the assigned id value to find it later on. Otherwise you won't know what id value got assigned to the employee unless you hold on to it, etc.


-Mike
Pro JPA 2: Mastering the Java Persistence API
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: Whats wrong with the code ?
 
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