/**
* Finds field object from relation notation
* @param string $sourceField
* @return Field
*/
protected function fieldLookup($sourceField)
{
if (preg_match("#^(id|pk)\$#i", $sourceField, $_match)) {
if ($this->model->getPrimaryKey() or $this->model->hasField('id')) {
return $_match[1] == 'pk' ? $this->model->getField($this->getModel()->getPrimaryKey()) : $this->model->getField($_match[1]);
} else {
throw new Exception('Model does not have primary key nor id field');
}
} elseif (preg_match("#^[a-z0-9]+(__([a-z0-9_]+))+\$#i", $sourceField, $_match)) {
return $this->getModel()->pathLookup($sourceField);
} elseif (!preg_match("#__#", $sourceField) && $this->getModel()->hasField($sourceField)) {
return $this->getModel()->getField($sourceField, true);
} else {
throw new Exception("Unable to translate field '{$sourceField}'.");
}
}
/**
* @param PerfORM $model
* @param string $from
* @return stdClass
*/
public function getRenameTable($model, $from)
{
$renameSequences = array();
$renameIndexes = array();
if ($pk = $model->getPrimaryKey()) {
$renameIndexes[] = $this->getPrimaryKey($model, $pk, $from);
if (get_class($model->getField($pk)) == 'AutoField') {
$renameSequences[] = (object) array('from' => $from . '_' . $pk . '_seq', 'to' => $model->getTableName() . '_' . $pk . '_seq');
}
}
$dropKeys = array();
foreach ($model->getForeignKeys() as $foreignKey) {
$dropKeys[] = $this->getForeignKey($model, $foreignKey, $from);
}
$addKeys = array();
foreach ($model->getForeignKeys() as $foreignKey) {
$addKeys[] = $this->getForeignKey($model, $foreignKey);
}
return (object) array('table' => $model->getTableName(), 'from' => $from, 'dropKeys' => $dropKeys, 'addKeys' => $addKeys, 'renameSequences' => $renameSequences, 'renameIndexes' => $renameIndexes);
}
