Re: Defining child Entities.
Re: Defining child Entities.
- Subject: Re: Defining child Entities.
- From: Gustavo Pizano <email@hidden>
- Date: Tue, 11 Aug 2009 12:42:55 +0200
sorry keepin gin the lsit.
On Tue, Aug 11, 2009 at 12:41 PM, Gustavo Pizano
<email@hidden> wrote:
Ahmm so I can relate Area to itslef?
interesting.. well I guess in the java class will be something like \
public Area ....
private NSArray <Area> areas...
or something like that.
another thing, but in the db I will need 2 tables isn't it? one area and anotherone SubAreas, I hadn't made such a inheritance in a relational world.
G.On Tue, Aug 11, 2009 at 12:38 PM, Stefan Klein
<email@hidden> wrote:
Hi Gustavo,
you need only one entity.
Area:
area_pk
parent_area_fk
foo
Now you build a relationship area_pk <->> parent_area_fk.
So each area can have many 'subareas' while one are has only one parent
area.
Stefan
Gustavo Pizano schrieb:
Hello Im doing an eomodel.. .and I have an entity called
Area, and SubArea, for me an area can have many subareas, but subarea
its an area itself also..
so its like Area <- >>SubArea.
Now what are the implications of defyning Area with its properties, and
then SubArea and put as parent Area?... I see that inside Area Entity
there is SubArea Entity also... but I guess this doesn't guaranties me
the to-many relationship between the 2 entities isn't it?do I still
have t defying the relationship?
Thanks
Gustavo
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