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Re: 3 way Many to many
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Re: 3 way Many to many


  • Subject: Re: 3 way Many to many
  • From: Arturo PĂ©rez <email@hidden>
  • Date: Mon, 27 Jan 2003 23:44:44 -0500

On Monday, January 27, 2003, at 11:38  AM, Jevon Hills wrote:


Here is my attempt to send an ascii ER model of what we're thinking of.




+==========+ +console + +----------------- + -------+consoleID + | +==========+ | | | +========================+ | +ConsolePersonPermission + | +========= + +------------------------------------------+ | +person + +consoleID +---------- | +-----------------+ +personID +----------------- +personID + +permissionID +---------- | +==========+ +========================+ | | +=============+ | +permission + | +----------------------+ |-------+permissionID + +=============+





This way you can circumvent the model.  You must link
	People to Consoles to Permissions
all at once.


Jevon


On Friday, January 24, 2003, at 03:06 PM, Art Isbell wrote:

On Friday, January 24, 2003, at 06:23  AM, Jevon Hills wrote:

We now wish to set up a 3 way (Many to Many to Many) relation ship.
For Example a Person has a set of permissions on a console. We want to
model a person having different sets of permissions for different
consoles.


[demime 0.98b removed an attachment of type multipart/appledouble]
In the old way of doing this I would just acquire the 3 id's I needed
and create a new row. How do I set this up in EOModeler so that I can
create/use the technology to my advantage.



I'm trying to understand what your issue is. I have in my models relationships like these.
I just do a


consoleEO. addObjectToBothSidesOfRelationshipWithKey(permissionEO, "permission");
Person.addObjectToBothSidesOfRelationshipWithKey(consoleEO, "ConsolePersonPermission");
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References: 
 >Re: 3 way Many to many (From: Jevon Hills <email@hidden>)

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