Re: [Rdfapi-php-interest] using replace, bug?

[Jonathan H. <hen...@ya...>]

I can achieve the desired results  - which is an update using

      $model3->remove(new Statement($subject , $predicate, $object));
       $model3->add(new Statement($subject , $predicate, $newObject));


Of course this is not handled as a complete transaction, and it could remove
without adding, or visa versa. No way to add a rollback, or undo (which would
be nice)


So, is replace functionally equivilent? It appears not because the $newObject
will replace anything unless it is null. It correctly finds the objects I am
seeking, but replaces $subject and $predicate too.

perhaps another handy function would only replace the object


in mem model for example (untested)

foreach($this->triples as $key => $value) {
    if (
         ($this->triples[$key]->subj->equals($subject)) and
         ($this->triples[$key]->pred->equals($predicate)) and
         ($this->triples[$key]->obj->equals($object)) 
       )
			$this->triples[$key]->obj = $replacement;

}












--- Jonathan Hendler <hen...@ya...> wrote:
> Why is the replace function disabled in the INF modes?
> 
> I also get an error when using replace on a DB model - 
> 
> "Fatal error: RDFAPI error (class: DbModel; method: find): Parameter
> mismatch
> in [my include path]/rdfapi-php/api/model/DbModel.php on line 669"
> 
> occurs with :
> 
> foreach ($result as $object)
> {
>   
>    $subject = $object['?subject']->uri;
>    $predicate = $object['?predicate']->uri;
>    $object = $object['?object']->label; // (assuming this is a literal)
>      
>      $newObject = $model->createLiteral(5); 
>      $dbModel->replace($subject , $predicate, $object, $newObject);
>       
> } 
> 
> 
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