Many-to-many w/ one entity
Many-to-many w/ one entity
- Subject: Many-to-many w/ one entity
- From: Clark Mueller <email@hidden>
- Date: Sat, 22 Jul 2006 22:20:06 -0500
All,
I'm trying to create a many-to-many relationship with a single
entity. Essentially, what I'm doing is trying to show "related
products" for a Product entity. EOModeler certainly won't model this
one. I have tried to model it myself (both in OpenBase directly, and
in EOModeler) mimicking the way EOModeler builds one with two
entities... but this breaks down a little bit when I try to sort out
the relationships from the intermediate table, so I haven't had a lot
of success. I am hoping that's just because I've never done it
before, and that someone can talk me through it. :-)
I've also seen this implemented in some cases by adding an attribute
(e.g. "related_products") to the entity containing data like this:
pk_1|pk_2|pk_3
pointing to the related items. But I am sure that this is a pain in
the butt to use with EO, to actually fetch those related objects.
Can someone suggest the best way to model this relationship?
Thanks & regards,
Clark
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