On Tuesday, August 7, 2018 at 12:15:22 PM UTC-7, Alexander Popov wrote:
>
> OK.
>
> So, if I want to:
>
> - Get result of transaction if everything is OK
> - Get result of `after_rollback` block if there is `Sequel::Rollback`
> - And get raised any other exception
>
> I should use local variables like:
>
> def foo
> result = nil
> DB.transaction do
> DB.after_rollback { result = validation_errors }
> raise Sequel::Rollback unless entity.valid?
> result = entity.save
> end
> result
> end
>
> Right? There is no more compact way?
>
That should work if you want to return the entity if the transaction
commits, the validation errors if it is not, and any exceptions to be
raised.
Your particular example could be made simpler, relying on the fact that
Sequel::Model uses transactions when saving:
def foo
entity.save(raise_on_failure: false) || validation_errors
end
However, if you are doing other things in your transaction block, you may
need your more elaborate construction. Note that in your code, validations
are run twice (once in valid? and once in save).
Thanks,
Jeremy
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