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Re: Delete rules on flattened relationships
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Re: Delete rules on flattened relationships


  • Subject: Re: Delete rules on flattened relationships
  • From: Paul Hoadley <email@hidden>
  • Date: Thu, 17 Nov 2011 10:18:10 +1030

On 17/11/2011, at 10:08 AM, David Avendasora wrote:

> On Nov 10, 2011, at 5:34 AM, Paul Hoadley wrote:
>
>> Say I have two entities, User and Role, and a joining entity UserRole to create a many-to-many relationship between them.  So I have a relationship 'userRoles' from User to UserRole (and a relationship 'userRoles' from Role back to UserRole).  I flatten the relationship on User, so I also have a 'roles' relationship on that entity.
>
> Wait. "Also"?!? That's insane. That's two distinct relationships representing the same DB information, and one is hiding a huge piece of the action. You are just asking for trouble.

User.userRoles is not a class property.  All that's exposed is the flattened User.roles.

I don't _think_ I'm talking about anything particularly unusual here, just the standard result of creating a many-to-many relationship with Entity Modeler, with a join entity and "Flatten relationships" checked.


--
Paul.

http://logicsquad.net/


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  • Follow-Ups:
    • Re: Delete rules on flattened relationships
      • From: David Avendasora <email@hidden>
References: 
 >Delete rules on flattened relationships (From: Paul Hoadley <email@hidden>)
 >Re: Delete rules on flattened relationships (From: Ramsey Gurley <email@hidden>)
 >Re: Delete rules on flattened relationships (From: Paul Hoadley <email@hidden>)
 >Re: Delete rules on flattened relationships (From: David Avendasora <email@hidden>)

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