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From "Clinton Begin" <clinton.be...@gmail.com>
Subject Re: Question on doing things the "Flat" way
Date Sun, 16 Nov 2008 14:27:36 GMT
I'd use 3 separate classes whether it was flat or not:  Person, Car,
CarRanking

I'd add the collection (and the back reference) as necessary (i.e. where it
made sense for my application).

Clinton

On Sat, Nov 15, 2008 at 6:43 AM, Rick <rickcr@gmail.com> wrote:

> I was going to mail this directly to a few of my buds, but figured
> whatever the response is, it could be useful for others...
>
> First the business requirements:
> //hypothetical example for sake of this email:
>
> 1) Show a single person and their favorite cars and display the
> person's rank of each car
>
> 2) Show multiple persons and their favorite cars and for each person
> display the person's rank of their cars
>
> The data model looks like:
>
> Person
> ---------
> id
> name
> //etc
>
>
> Car
> -----
> id
> name
> make
> color
> //etc
>
>
> Person_Car
> --------------
> person_id
> car_id
> Integer rank
>
>
>
> So how do you guys  like to set up you value objects to represent the
> scenarios in 1 and 2?
>
> Some of you I know wouldn't like to have a
> Collection<Car> favoriteCars in the Person object
>
> Also, what do you do about the "Integer rank?"
>
> Since "rank" is only one field, I'd consider adding it as a property
> on Car. If there were a lot of properties (like imagine Date rankDate
> , etc.) I might make a "CarRank" value object. Lets say you had the
> latter (a "CarRank" object) - for you guys that do things flat how do
> you return your object graph?  Would you return a Map with Person as
> key, and the value as a List of Maps where "Car" is key and "CarRank"
> object as value?
>
> I tend to think in terms of adding collections to my objects as
> properties, so this 'flat' concept is new to me, but I really want to
> nail down this "flat" way of thinking so I can consider using it
> myself.
>
> Thanks for any feedback.
>

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