Re: Error handling strategies (db related)

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On Tue, Apr 27, 2010 at 03:41:04PM +0200, Peter Lind wrote:

> On 27 April 2010 15:36, Paul M Foster <paulf@xxxxxxxxxxxxxxxxx> wrote:
> > On Tue, Apr 27, 2010 at 10:42:03AM +0200, Gary . wrote:
> >
> >> How do you guys handle errors during, say, db insertions.
> >>
> >> Let's say you have an ongoing transaction which fails on the n-th
> >> insert. Ok, you roll back the transaction, no problem. How do you then
> >> inform the user? Just using the text from pg_result_error  or
> >> something?
> >
> > I use trigger_error() and stop execution at that point. I give the user
> > an error that basically says, "Talk to the admin/programmer". And I send
> > the programmer a message containing a trace of what occurred. The theory
> > is that, all things being equal, such an error should never occur and
> > there is no user recovery. If the user properly entered the data they
> > were asked for, then the transaction should go through without incident.
> > If something prevents the transaction from going through, it's likely a
> > coding problem and up to the programmer or admin to repair.
> >
> 
> Fair reasoning, but it amounts to throwing a bucket of cold water in
> the face of your user. If I was looking at an error like that, I'd get
> mighty annoyed with the software, and after a while would definitely
> look for alternatives. Whether or not there's a coding problem, you
> have to look at the situation from the point of the user: a complete
> failure with no information is like a BSOD/TSOD ... and we all know
> the effect they have on a user.

I assume (1) that I've vetted the user data and given them the option to
repair it if it's faulty; (2) beyond the beta phase, this type of error
should not happen. If it does, it's a coding problem. Given that the
user can do *nothing* about this and it *is* a coding problem, what
would you tell the user?

If I was the user, I'd be cranky as well. But if I were a smart user,
I'd realize that the programmer made a mistake and put the
responsibility firmly on him. And expect him to fix it pronto.

Paul

-- 
Paul M. Foster

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