/**
* Determine if a given value is unique within the metamodel.
*
* @param string $strField the attribute name.
*
* @param mixed $varNew the value that shall be checked.
*
* @param int $intId the (optional) id of the item currently in scope - pass null for new items.
*
* @return bool true if the values is not yet contained within the table, false otherwise.
*/
public function isUniqueValue($strField, $varNew, $intId = null)
{
$objFilter = $this->objMetaModel->getEmptyFilter();
$objAttribute = $this->objMetaModel->getAttribute($strField);
if ($objAttribute) {
$this->calculateSubfilter(array('operation' => '=', 'property' => $objAttribute->getColName(), 'value' => $varNew), $objFilter);
$arrIds = $objFilter->getMatchingIds();
return count($arrIds) == 0 || $arrIds == array($intId);
}
return false;
}
/**
* Prepare the rendering
*/
public function prepare()
{
if ($this->objItems) {
return $this;
}
// create an empty filter object if not done before
if (!$this->objFilter) {
$this->objFilter = $this->objMetaModel->getEmptyFilter();
}
if ($this->objFilterSettings) {
$this->objFilterSettings->addRules($this->objFilter, $this->arrParam);
}
$this->modifyFilter();
$intTotal = $this->objMetaModel->getCount($this->objFilter);
$this->calculatePagination($intTotal);
$this->objItems = $this->objMetaModel->findByFilter($this->objFilter, $this->strSortBy, $this->intOffset, $this->intLimit, $this->strSortDirection, $this->getAttributeNames());
return $this;
}
