• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
Re: database concept help
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: database concept help


  • Subject: Re: database concept help
  • From: Theodore Petrosky <email@hidden>
  • Date: Wed, 29 Sep 2010 06:14:37 -0700 (PDT)

so I am creating a little test.

I have a People and a Job entity.
attributes:

People has a personName attribute
and
Job has a jobtitle

I created the many to many selecting the Flatten Relationship option.

I get a new entity:   PeopleJob

so far so good.

I see in _Job.java a method:

addToPeoplesRelationship but no 'set'. Was that a typo on your part?

I am going to continue playing with my test app and see where it leads me.

thanks for the help.

Ted

--- On Wed, 9/29/10, Pascal Robert <email@hidden> wrote:

> From: Pascal Robert <email@hidden>
> Subject: Re: database concept help
> To: "Theodore Petrosky" <email@hidden>
> Cc: email@hidden
> Date: Wednesday, September 29, 2010, 6:47 AM
>
> 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).



 _______________________________________________
Do not post admin requests to the list. They will be ignored.
Webobjects-dev mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:

This email sent to email@hidden

  • Follow-Ups:
    • Re: database concept help
      • From: Paul D Yu <email@hidden>
References: 
 >Re: database concept help (From: Pascal Robert <email@hidden>)

  • Prev by Date: Re: REST routes in JavaMonitor
  • Next by Date: UNIQUE constraint on Entity Modeler
  • Previous by thread: Re: database concept help
  • Next by thread: Re: database concept help
  • Index(es):
    • Date
    • Thread