Re: circular relationships ok?
From: Marshall Spight <marshall.spight_at_gmail.com>
Date: 2 Mar 2006 14:23:49 -0800
Message-ID: <1141338229.205016.317760_at_i39g2000cwa.googlegroups.com>
> For example, suppose I want to implement a constraint that each Order
> must have exactly one Invoice and each Invoice must have exactly one
> Order. That seems like a reasonable business rule, even if it's a
> slightly unusual one.
Date: 2 Mar 2006 14:23:49 -0800
Message-ID: <1141338229.205016.317760_at_i39g2000cwa.googlegroups.com>
David Portas wrote:
>
> For example, suppose I want to implement a constraint that each Order
> must have exactly one Invoice and each Invoice must have exactly one
> Order. That seems like a reasonable business rule, even if it's a
> slightly unusual one.
If that is the business rule, then are not Invoices and Orders the same entity?
Marshall Received on Thu Mar 02 2006 - 23:23:49 CET