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From: Pete Ford on 28 Apr 2010 04:28
On 27/04/10 16:37, tedd wrote:
> Error handling is almost an art form.
>

More like a black art - voodoo perhaps...
From: viraj on 28 Apr 2010 09:27
On Tue, Apr 27, 2010 at 7:34 PM, Gary . <php-general(a)garydjones.name> wrote:
> On Tue, Apr 27, 2010 at 10:46 AM, Peter Lind wrote:
>> On 27 April 2010 10:42, 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?
>>>
>>
>> If it's a normal user, give them some info about what went wrong but
>> not the specific error returned.
>
> Yeah. I know :( Originally I couldn't find a "nice" way of translating
> between db errors and "user" errors. The only interface to the db
> errors that I could find was the error messages returned from
> pg_last_error. Yes, I could have used an array translating between the
> the strings returned by pg_last_error or whatever, but *gag* it would
> not only have made the code look horrible but would also have been
> susceptible to changes in the error messages returned by the db
> interface. In the end I changed tack slightly and used pg_send_* and
> pg_result_error_field to get a short code I could use as a reference
> into an array.

thought of adding few extra things i do.

i keep a constant to check the running environment. before i do the
'trigger_error' with pg/mysql raised error, i conditionally check
whethr it's 'live', 'beta' or 'dev' environment and use different
error_handlers. if it's 'production' environment, the error handler
will write the detail error with all back-trace and possible sql
queries and data into a log file with a unique id, and displays a
friendly message with that reference id, so the user can report to sys
admin if he/she wishes.

~viraj




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