Re: database concept help
Re: database concept help
- Subject: Re: database concept help
- From: Pascal Robert <email@hidden>
- Date: Wed, 29 Sep 2010 06:47:48 -0400
Le 2010-09-29 à 06:42, Theodore Petrosky a écrit :
> I am altering a project (adding a relation) and I don't understand the "Flatten relationship" option.
>
> this will be a many to many. I just don't understand what flattening does. I started googling and so far the answers don't click.
>
> what's happening in a flattened vs an un-flattened relationship.
Flattened means that the table in the middle (that only holds the keys to join the two other tables) is "hidden" in the EOs, and when you create a new object in one of the two tables, the join table will automatically be populated.
So let's say you have a People and a Job tables, and the join table is People_Job, to add a new job to a person, you do :
aPerson.setRelationJob(newJob)
No need to do aPerson.setRelationshipPeopleJob(new PeopleJob). _______________________________________________
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