/**
* Creates a view with name $viewID based on $refType bean type
* and then left-joining the specified types in $types in the given
* order.
*
* @param string $viewID desired name of the view
* @param string $refType first bean type to be used as base
* @param array $types array with types to be left-joined in view
*
* @return boolean $success whether we created a new view (false if already exists)
*/
public function createView($viewID, $refType, $types)
{
if ($this->oodb->isFrozen()) {
return false;
}
$history = array();
$tables = array_flip($this->writer->getTables());
$refTable = $refType;
//$this->writer->safeTable($refType, true);
$currentTable = $refTable;
$history[$refType] = $refType;
foreach ($types as $t) {
if (!isset($history[$t])) {
$history[$t] = $t;
$connection = array($t, $currentTable);
sort($connection);
$connection = implode("_", $connection);
$connectionTable = $this->writer->safeTable($connection, true);
if (isset($tables[$connectionTable])) {
//this connection exists
$srcPoint = $this->writer->safeTable($connection) . "." . $this->writer->safeColumn($currentTable . "_id");
//i.e. partic_project.project_id
$dstPoint = $this->writer->safeTable($currentTable) . "." . $this->writer->safeColumn($this->writer->getIDField($currentTable));
//i.e. project.id
$joins[$connection] = array($srcPoint, $dstPoint);
//now join the type
$srcPoint = $this->writer->safeTable($connection) . "." . $this->writer->safeColumn($t . "_id");
$dstPoint = $this->writer->safeTable($t) . "." . $this->writer->safeColumn($this->writer->getIDField($t));
$joins[$t] = array($srcPoint, $dstPoint);
} else {
//this connection does not exist
$srcPoint = $this->writer->safeTable($t) . "." . $this->writer->safeColumn($currentTable . "_id");
$dstPoint = $this->writer->safeTable($currentTable) . "." . $this->writer->safeColumn($this->writer->getIDField($currentTable));
$joins[$t] = array($srcPoint, $dstPoint);
}
}
//now set the new refTable
$currentTable = $t;
}
try {
$rs = (bool) $this->writer->createView($refType, $joins, $viewID);
} catch (Exception $e) {
throw new RedBean_Exception_SQL('Could not create view, types does not seem related (yet)..');
}
return $rs;
}