in reply to broken twig?

Are you sure $twig->purge in process_attachment doesn't do what you want? In any case purge should be called on the twig object, not on an element.

Just in case you need it (you shouldn't from your description of the problem), you can also use the purge_up_to method.

method

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Re^2: broken twig?
by gregaryh (Novice) on Sep 13, 2005 at 20:51 UTC

    That is the thing that confuses me. $twig->purge in process_attachment() seems to delete the whole record, not just the attachment. What I want to do is purge only the attachment.

    I also call purge in process_record and it seems to do what is expected there (if I comment out the purge in process_attachment that is) Meaning if I have multiple records, each one is purged in turn after processing
    using purge_up_to($attach) does the same. When process_record is called it has no children so it has nothing to process Am I doing something wrong in the way I handle the attachment?

    here is a more faithful view of the xml: 

    <document version="2.2">
    <record>
          <record_id>113082</record_id>
          <creation_ts>2005-09-08 11:53 MDT</creation_ts>
          <short_desc>test</short_desc>
          <delta_ts>2005-09-08 11:58:21 MDT</delta_ts>
          <attachment>
            <attachid>47644</attachid>
            <date>2005-09-08 11:55 MDT</date>
            <desc>diff</desc>
            <data>Large amounts of encoded data 
                  in excess of 5 MB </data>
          </attachment>
          <attachment>
             ....
          </attachment>
    </record>
</document>

    [download]
[reply]
[d/l]

      The twig_purge in attachment will indeed purge everything before that element, meaning that the record_id, creation_ts, short_desc and delta_ts elements will be purged, but the (now empty) record will be kept. Is this what is causing you problems?

      Maybe what you are looking for is just $attach->delete in the attachment handler, then $twig->purge in the record handler. If Scalar::Util is installed, then using delete will release the memory for the attachment (at least so it can be re-used by the Perl process).

[reply]
[d/l]
[select]

        That is exactly what I need ($attach->delete) THANK YOU!!!

        btw, The XML::Twig module is absolutely awsome. It has greatly reduced the amount of work I need to do on this project (we had been using just plain old XML::Parser tree with a load of magic numbers to identify elements)

        Out of curiosity, is Scalar::Util installed with the base perl packages? cause I don't recall installing it separately but it seems to be on my system.

        Thanks again.

[reply]

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