heh, I made a mistake with the rule
( Location(z, y;) and ?hasFood(x, z;) )
should be
( Location(z, y;) and hasFood(x, z;) )
Otherwise it's not reactive, and then ordering matters.
With that change I can do the insertions in any order and all is fine.
Mark
On 22/06/2011 19:30, Mark Proctor wrote:
> ok I managed to re-create the test with:
> "package org.drools.test \n" +
>
> "import java.util.List\n" +
> "import java.util.ArrayList\n" +
>
> "global List list\n" +
>
> "dialect \"mvel\"\n" +
>
> "declare Person\n" +
> " name : String\n" +
> " likes : String\n" +
> "end\n" +
> "\n" +
> "declare Location\n" +
> " thing : String \n" +
> " location : String \n" +
> "end\n" +
> "\n" +
> "declare Edible\n" +
> " thing : String\n" +
> "end\n" +
> "\n" +
> "\n" +
> "query hasFood( String x, String y ) \n" +
> " Location(x, y;) " +
> " or \n " +
> " ( Location(z, y;) and ?hasFood(x, z;) )\n"+
> "end\n" +
> "\n" +
> "rule look when \n" +
> " Person( $l : likes ) \n" +
> " hasFood( $l, 'kitchen'; )\n" +
> "then\n" +
> " list.add( 'kitchen has ' + $l );" +
> "end\n" +
> "rule go1 when\n" +
> " String( this == 'go1') \n" +
> "then\n" +
> " insert( new Person('zool', 'peach') );\n" +
> " insert( new Location(\"table\", \"kitchen\") );\n" +
> " insert( new Location(\"peach\", \"table\") );\n" +
> "end\n" +
> "\n";
>
> On 22/06/2011 18:25, Mark Proctor wrote:
>> On 22/06/2011 16:39, Wolfgang Laun wrote:
>>> This is related to the example in 2.1.2.8., Backward Chaining.
>>>
>>> Using the same rules and queries given there, the sequence of fact
>>> insertions
>>>
>>> insert( new Here( "table" ) );
>>> insert( new Edible( "peach" ) );
>>> insert( new Location( "peach", "table" ) );
>>>
>>> results in nothing being seen and nothing being edible, whereas
>>>
>>> insert( new Edible( "peach" ) );
>>> insert( new Location( "peach", "table" ) );
>>> insert( new Here( "table" ) );
>>>
>>> results in the obvious and expected result.
>>>
>>> There is no difference w.r.t. using '?' in front of query names.
>> Take a look at the tests here, see if you can add the logic that you
>> think should works and doesn't and let us know. As far as I know
>> insertion order should not matter:
>> https://github.com/droolsjbpm/drools/blob/master/drools-compiler/src/test/java/org/drools/integrationtests/BackwardChainingTest.java
>>
>> Mark
>>> -W
>>>
>>> _______________________________________________
>>> rules-dev mailing list
>>> rules-dev@lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/rules-dev
>>>
>>>
>> _______________________________________________
>> rules-dev mailing list
>> rules-dev@lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-dev
>>
>>
>
> _______________________________________________
> rules-dev mailing list
> rules-dev@lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-dev
>
>
_______________________________________________
rules-dev mailing list
rules-dev@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-dev
