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Wednesday 05 May 2010 8:38:22 pm
Hi folks, What's the best way to query the ezcontentobject_attribute table and fetch an attribute's contentobject_id using only a ezcontentobject_attribute.id as a 'key'? I have a method as part of a mod to an extension that parses the eZ contentobject_attribute ID from an <img> element (in ezxmlexport) and returns its contentobject_id. But it's just a plain DB query (see below) So is there a more robust way to perform these queries? eZ Components maybe? Here is the method:
/*
* @desc Fetch ezcontentobject_id FROM ezcontentobject_attribute TABLE given an id
*/
function fetchContentObjectFromCOAID($id)
{
$query = '';
$db =& eZDB::instance();
// Multiple version will be returned unless we restrict the version to latest:
$query .= 'SELECT contentobject_id FROM ezcontentobject_attribute WHERE id = '.$id;
$query .= ' AND version = (SELECT MAX(version) FROM ezcontentobject_attribute WHERE id = '.$id.')';
$rows = $db->arrayQuery($query);
if($rows)
{
return $rows;
}
}If you're interested - here is the other custom method I wrote for the ezxmlexport extension - used with fetchContentObjectFromCOAID() above - to parse exported XML for <img> elements and replace with <embed> elements so they get imported correctly by the data_import extension:
/*
* @desc Replace "faulty" <img> tags which don't play well with data_import extension
* This method converts <img> elements to <embed> elements, which _do_ import
* @ToDo Is there some XSL magic that could do this as this would be the correct tier to perform this dort of task
* @author Russell Michell April/May 2010
* @param str $xmlstring the string converted via eZXMLTextType::domString()
* @return str $xmlstring to be passed to custom source handler for data_import
*/
function imgToEmbed($xmlstring)
{
// Get the string nmerical identifier from the URL path of the <img> tag's src attribute:
preg_match_all('#<img src=".*/([0-9]{1,9})-.*".*>#',$xmlstring,$matches);
$treeData = array();
foreach($matches[1] as $key=>$contentobject_attribute_id)
{
$treeData[] = $this->fetchContentObjectFromCOAID($contentobject_attribute_id);
}
// use $val[$i] notation as retured array from DB query uses a numeric index as does $treeData
$replacement = array();
$i=0;
foreach($treeData as $key=>$val)
{
$replacement[] = '<embed href="ezobject://'.$val[$i]['contentobject_id'].'" size="standard"
/>';
}
$pattern = array();
foreach($matches[0] as $match)
{
// Create an array so we can use array:array replacement in preg_replace()
$pattern[] = '#'.preg_quote($match).'#';
}
$retstring = preg_replace($pattern,$replacement,$xmlstring);
return $retstring;
}Any help on this would be very gratefully received as I'm pretty much poking about in the dark otherwise! Oh and if you know anything more about importing/exporting content objects like 'images' - that would be very helpful.
Many thanks,
Russ
Russell Michell, Wellington, New Zealand.
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