Re: How to get the failing EO when a unique constraint violation occurs?
Re: How to get the failing EO when a unique constraint violation occurs?
- Subject: Re: How to get the failing EO when a unique constraint violation occurs?
- From: Amiel Montecillo <email@hidden>
- Date: Tue, 12 Jan 2010 16:23:55 +0800
Yeah, I hope some freaky DBA won't change the constraint name.
If only EOF could spurt out the EO that caused the violation and that works with all supported DBs I'd be happier, but this will do for now.
Thanks again Chuck!
On Tue, Jan 12, 2010 at 3:33 PM, Chuck Hill
<email@hidden> wrote:
On Jan 11, 2010, at 10:26 PM, Amiel Montecillo wrote:
Hi Chuck,
I'm not sure if I got you correctly (english is not my natural language).
But this what I am doing:
1. Determine the unique constraint violation exception
2. Get the table and constraint name
Next exception:SQL State:23000 -- error code: 1 -- msg: ORA-00001: unique constraint (WATCHLISTDEV.WATCHLISTUSER_CON_UEMAIL) violated
3. throw new ERXValidationException(constraintName, null, null);
4. In ValidationTemplate.strings:
WATCHLISTDEV.WATCHLISTUSER_CON_UEMAIL = "This email address is already taken.";
It works, but I am not sure this is the best way.
I think that might be the best you can do with Wonder validation. Mike was adding something a while back, but I think you are doing it "right". Is does not feel very satisfactory, does it?
Chuck
On Tue, Jan 12, 2010 at 2:07 PM, Chuck Hill <chill@global-village.net> wrote:
Hi Amiel,
You can only get it if you are not using deferred constraints. If you are using deferred constraints, the exception is only thrown at the end of the transaction and EOF has no way of knowing which EO caused the error. The best solution that I have found is to parse out the table name and use that to infer the entity. If you are using single table inheritance, this is not perfect, but as all entities in the inheritance hierarchy will have to have the same constraint the error is probably also consistent. If you can get the entity name, you can then form a reasonable error message.
Chuck
On Jan 11, 2010, at 9:56 PM, Amiel Montecillo wrote:
Hi Everyone,
Is it possible to get the failed EO instance when an unique constraint violation occurs? I have been digging in EOGeneralAdaptorException but I couldn't figure out how to get the instance of the EO that has failed.
Rgds,
Amiel
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Chuck Hill Senior Consultant / VP Development
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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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