Re: Duplicate record
Re: Duplicate record
- Subject: Re: Duplicate record
- From: Nathan Dumar <email@hidden>
- Date: Thu, 22 Jul 2004 18:36:58 -0400
Going back to the original question/problem and re-reading it, I'm
wondering why you're trying to create a duplicate of the record.
You want to modify the record, but keep it from being modified?
If you fetch the record and modify its attributes, but you don't
specifically modify it's relationship to other objects, all of the
references to other objects will stay the same. For example, if you
have a restaurant object with a to-many relationship to 5 chef objects,
you can change the name of the restaurant, the address, etc, and it
will still have references to the same 5 chefs as before. That will
not change unless you specifically assign a new array of chef objects
to the restaurant's chef relationship attribute, or you set a different
restaurant in a chef's restaurant relationship attribute. (Now did
that sound confusing or what?)
If you're worried about the record being deleted, and other objects
trying to refer to a deleted object, then you can set how such a
deletion should be handled, using the Delete Rule. You can set the
Delete Rule using the Advanced Relationship Inspector, in EOModeler.
Here's the description of Delete Rule options, from the document Using
EOModeler:
http://developer.apple.com/documentation/WebObjects/UsingEOModeler/
5WorkingWithRelationships/chapter_5_section_5.html#//apple_ref/doc/uid/
TP30001018-DontLinkChapterID_4-BABCCJCI
I hope that helps.
Nathan
On Jul 20, 2004, at 6:03 PM, A. Uchida wrote:
Hi there,
WO 5.2
Mac OS X10.3.4
Postgresql7.3.4 (pg73jdbc.jar)
When modifying an existing record in a table I want to keep the
existing record as it is,
because it might be used (relationed) to the other records in the
other table.
What I've tried was :
Show details of a record which is going to be modified
Insert new object into the table
Copy the details of record to the inserted object
and saveChanges()
But it gets primary key duplication error.
And I tried search on web/mailing list but I couldn't find any clue.
I even doesn't know what would be the keyword for search this issue.
Any help would be very much appreciated.
A. Uchida
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