[rules-users] Drools Decision Table with no rules matches blank rule

[Michael Anstis]

Providing a XLS exhibiting he problem would be beneficial. A unit test in
drools-decisiontables even more so.

>From what I gather you're saying if the XLS contains no definitions,  I.e.
only keywords, Drools is generating a single empty rule.

Sent on the move
On 30 Oct 2013 22:14, "srtatz" <srtatz at live.com> wrote:

> I have an xls file with the appropriate header lines to make the xls a
> Drools
> Decision Table that I provide to my users.  I validate the content/data
> they
> enter, but do allow it to be "blank", that is, no user data, just the
> Drools
> Decision Table key words, conditions, actions, etc.
>
> When using the stateful knowledge session built using the Drools Decision
> Table, I insert an object implementing AgendaEventListener and override the
> afterActivationEvent method to record on the object which row was hit.  I
> found that it is saying it hit the first row in the Drools Decision Table
> after the header information.  But that corresponds to a blank line, since
> the table is blank.  It seems to have generated a blank drl rule behind the
> scenes with no conditions (so it always succeeds) and no actions.  Since I
> have logic based on whether or not a rule was successfully selected, this
> selection of a non-existent rule breaks my code.
>
> The user won't really be using a blank spreadsheet, but I need to cover the
> situation. The validation is pretty set in stone right now so I don't want
> to force the user to have some data.
>
> Can anyone suggest an easy way to stop it from matching the blank line?
>
> Thanks,
>
> Steve
>
>
>
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