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Re: Limiting number of assignments in a many-to-many relationship
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Re: Limiting number of assignments in a many-to-many relationship


  • Subject: Re: Limiting number of assignments in a many-to-many relationship
  • From: Alexander Spohr <email@hidden>
  • Date: Mon, 12 Jan 2004 22:44:45 +0100

steve,

- There are many persons
- There are many organisations
- Many persons can be assigned to an organisation
- A person can be assigned to one and only one organisation

this is a 1:n relationship. you just add the primary key of a organisation to the person entity. from organisation ->> person it's to n (NSArray), from person -> organisation it's to one.


throw away the many to many entity.

	atze
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References: 
 >Limiting number of assignments in a many-to-many relationship (From: Steve Sharman <email@hidden>)

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