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

[Wolfgang Laun]

Here I was too hasty taking the Document pattern as granted. The
createError only fires if field1 *and* field2 are null/"", but the
initial statement says "...if *any* field is null...".

Therefore, you must use

when
   not Error()
   ( Document( field1== null || == ("") )
     or
     Document( field2 == null || == ("") ) )
then

-W

On 03/02/2012, Wolfgang Laun <wolfgang.laun at gmail.com> wrote:
> rule "createError"
> when
>    not Error()
>    emptyDoc: Document( field1== null || == (""), field2 == null || == ("")
> )
> then
>    Error fact0 = new Error();
>    fact0.setErrorCode( "code1" );
>    insert(fact0);
> end
>
> rule "retractBadDocs"
> when
>    Error()
>    $doc: Document()
> then
>    retract( $doc );
> end
>
> -W
>
>
> On 02/02/2012, 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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>