[rules-users] how to retract all documents created in the following scenario

[Wolfgang Laun]

The rule shown below isn't correct. It will create an Error, but it
won't retract *all* Document facts as there may be some that do not
have field1 or field2 set to null/"".
-W

On 02/02/2012, Esteban Aliverti <esteban.aliverti at gmail.com> wrote:
> You could do something like this:
>
> rule 'empty documents'
> ...
> when
>   $emptyDocs: List(size>0) from collect ( Document( field1== null || == (
> "" ) , field2 == null || == ( "") ) )
> then
>     //insert an error
>     Error fact0 = new Error();
>     fact0.setErrorCode( "code1" );
>     insert(fact0 );
>
>     //retract empty documents
>     for (int i=0; i < $emptyDocs.size(); i++){
>         retract( $emptyDocs.get(i));
>     }
>
> end
>
>
> Best Regards,
>
> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>
> Esteban Aliverti
> - Developer @ http://www.plugtree.com
> - Blog @ http://ilesteban.wordpress.com
>
>
> On Thu, Feb 2, 2012 at 9:59 PM, vadlam
> <sreeram.vadlamudi at wellsfargo.com>wrote:
>
>> Hi All,
>>
>> we have a scenario whereby, several documents are created as part of the
>> ruleflow. at the end of the ruleflow, if any of the fields in the document
>> is empty or null, we would like to create a error (only one error) and
>> retract all the documents so far.
>>
>> rule "createError"
>>            ruleflow-group "mrHardErrors"
>>            no-loop true
>>            dialect "mvel"
>>
>>            when
>>
>>
>> emptyDoc : Document( field1== null || == ( "" ) , field2 == null || == (
>> ""
>> )  )
>>                doc : Document( )
>>            then
>>
>>                Error fact0 = new Error();
>>                fact0.setErrorCode( "code1" );
>>                insert(fact0 );
>>                retract( emptyDoc);
>>
>> end
>>
>> I see that error is created more than once ( as many as matching documents
>> )
>>
>> How do we ensure that all documents are retracted and also the error is
>> created only once ?
>>
>> --
>> View this message in context:
>> http://drools.46999.n3.nabble.com/how-to-retract-all-documents-created-in-the-following-scenario-tp3711226p3711226.html
>> Sent from the Drools: User forum mailing list archive at Nabble.com.
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>>
>