Re: Handeling DB Unique Constraints
Re: Handeling DB Unique Constraints
- Subject: Re: Handeling DB Unique Constraints
- From: Chuck Hill <email@hidden>
- Date: Tue, 24 Nov 2009 14:21:03 -0800
On Nov 24, 2009, at 2:17 PM, Anjo Krank wrote:
Not really sure of the messages can be useful, tough, as they use
the name of the constraint:
ERROR: duplicate key value violates unique constraint "bb"
and not the key (postgres). So the end user probably won't know
about this. But it may still be better than a real exception.
Run the constraint name + entity name through the "validation
exception to nice message" part of Wonder.
e.g.
LoginUser.uniqueUserName = "You have already registered under this
user name."
Where uniqueUserName is the constraint name.
Chuck
Am 24.11.2009 um 22:18 schrieb Anjo Krank:
Am 24.11.2009 um 21:27 schrieb Chuck Hill:
The last I found about it (from May, 2008) was a discussion about
using an ERXEC delegate, which in turn would use the DB specific
ERXSQLHelper.
Did anyone ever actually implement this?
Yes.
What he said :P
But there are no implementations for subclasses so far. Patches and
ideas welcome.
Cheers, Anjo
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--
Chuck Hill Senior Consultant / VP Development
Practical WebObjects - for developers who want to increase their
overall knowledge of WebObjects or who are trying to solve specific
problems.
http://www.global-village.net/products/practical_webobjects
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