/**
* Deletes this model instance from the database.
*
* @return bool
*/
protected function delete_self()
{
// Create the query and limit to primary key(s)
$query = Query::forge(get_called_class(), static::connection(true))->limit(1);
$primary_key = static::primary_key();
foreach ($primary_key as $pk) {
$query->where($pk, '=', $this->{$pk});
}
// Return success of update operation
return $query->delete();
}
/**
* Delete current object
*
* @param mixed $cascade
* null = use default config,
* bool = force/prevent cascade,
* array cascades only the relations that are in the array
* @return Model this instance as a new object without primary key(s)
*/
public function delete($cascade = null, $use_transaction = false)
{
// New objects can't be deleted, neither can frozen
if ($this->is_new() or $this->frozen()) {
return false;
}
if ($use_transaction) {
$db = \Database_Connection::instance(static::connection());
$db->start_transaction();
}
try {
$this->observe('before_delete');
$this->freeze();
foreach ($this->relations() as $rel_name => $rel) {
$rel->delete($this, $this->{$rel_name}, false, is_array($cascade) ? in_array($rel_name, $cascade) : $cascade);
}
$this->unfreeze();
// Create the query and limit to primary key(s)
$query = Query::forge(get_called_class(), static::connection())->limit(1);
$primary_key = static::primary_key();
foreach ($primary_key as $pk) {
$query->where($pk, '=', $this->{$pk});
}
// Return success of update operation
if (!$query->delete()) {
return false;
}
$this->freeze();
foreach ($this->relations() as $rel_name => $rel) {
$rel->delete($this, $this->{$rel_name}, true, is_array($cascade) ? in_array($rel_name, $cascade) : $cascade);
}
$this->unfreeze();
// Perform cleanup:
// remove from internal object cache, remove PK's, set to non saved object, remove db original values
if (array_key_exists(get_called_class(), static::$_cached_objects) and array_key_exists(static::implode_pk($this), static::$_cached_objects[get_called_class()])) {
unset(static::$_cached_objects[get_called_class()][static::implode_pk($this)]);
}
foreach ($this->primary_key() as $pk) {
unset($this->_data[$pk]);
}
$this->_is_new = true;
$this->_original = array();
$this->observe('after_delete');
$use_transaction and $db->commit_transaction();
} catch (\Exception $e) {
$use_transaction and $db->rollback_transaction();
throw $e;
}
return $this;
}
