Re: Displaying Primary Keys
Re: Displaying Primary Keys
- Subject: Re: Displaying Primary Keys
- From: Chuck Hill <email@hidden>
- Date: Fri, 26 Dec 2003 11:47:47 -0800
Drew,
There is no need to exclude a primary key from the class in order to have
EOF manage the relations. EOF simply removes the need to manage these
yourself.
There are two schools of thought on this, one is wrong ;-) and the other
maintains that primary key values should be meaningless. As meaningless
values, there is never any need nor use to display them in the UI. Thus,
the should not be included in the public (class) attributes in the EOModel.
If your userID is what the user types when they login, then it should *not*
be the PK. Add another column to serve as the key. This way if a userID
ever needs to be changed (e.g. for a legal name change, marriage, whatever)
then the update can be made to the information (what the user types)
without affecting the validity of the relationships. A rose by any other
name...
Chuck
At 08:54 AM 26/12/2003 -0500, Drew Thoeni wrote:
>public void newbieProblem() {
>I read (and have found) that if I want to properly used object
>references between enterprise objects that I must not include the
>primary key in the class (i.e., I click the diamond off in EO Modeler).
>However, there are times I want to display the primary key. For
>example, in administration pages, I like to display the userID. Or when
>editing code tables, the primary key would be useful to display.
>}
>
>public Answer newbieQuestion() {
>What is the proper way to do this? Any references out there you suggest.
>}
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--
Chuck Hill email@hidden
Global Village Consulting Inc. http://www.global-village.net
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