/**
* Gets the length of the value in a particular field. This can be especially
* useful for blob and longtext fields that aren't loaded into memory. It allows
* you to see if there is indeed a value there.
*
* @param string $fieldname The name of the field to check.
* @param integer $index If this is a related field then this is the index offset.
* @param string $where If this is a related field this is a where clause to filter the results.
* @param string $sort If this is a related field then this is a sort clause to sort the results.
* @return integer The length of the specified field's value in bytes.
*/
function getLength($fieldname, $index = 0, $where = 0, $sort = 0)
{
if (strpos($fieldname, '.') !== false) {
list($relname, $localfieldname) = explode('.', $fieldname);
$record =& $this->getRelatedRecords($relname, false, $index, null, $where, $sort);
$relatedRecord = new Dataface_RelatedRecord($this, $relname, $record);
$relatedRecord->setValues($this->_relatedMetaValues[$relname][0][0][$index]);
return $relatedRecord->getLength($localfieldname);
//$key = '__'.$localfieldname.'_length';
//if ( isset($record[$key]) ){
// return $record[$key];
//} else {
// return null;
//}
} else {
$key = '__' . $fieldname . '_length';
if (isset($this->_metaDataValues[$key])) {
return $this->_metaDataValues[$key];
} else {
return strlen($this->getValueAsString($fieldname));
}
}
}
