On Aug 2, 2009, at 9:35 AM, Miguel Lopes wrote:
>> Generally you want to catch errors in your saves, and when an
>> error
>> is encountered, rollback everything. Only if no errors occur do you
>> call commitTransaction.
>
> How can I catch errors in saves?
> I've checked the API and bizobj methods save() and saveAll() do not
> raise errors.
Yes, they do. If the bizobj in question is controlling the
transaction, it will handle the rollback on such errors, and then re-
raise the exception for the UI (or any other calling object) to
respond to. In Dabo, we define our own exceptions that are used when
certain problems are encountered; in the save() method alone, the
following exception classes are used:
dException.BusinessRuleViolation
dException.MissingPKException
dException.ConnectionLostException
dException.NoRecordsException
dException.DBQueryException
dException.dException
These different exception classes allow us to handle different
situations appropriately; all Dabo exception classes inherit from
dException.dException. In your code you could do something simple like:
try:
self.save()
except dException.dException, e:
dabo.errorLog.write("Save failed with error: %s" % e)
self.rollbackTransaction()
-- Ed Leafe
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