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