/**
* gc
*
* @param string $past
*
* @return bool
*/
public function gc($past)
{
$query = $this->db->getQuery(true);
$query->delete($this->db->quoteName($this->options['table']))->where($this->db->quoteName($this->options['time_col']) . ' < ' . $this->db->quote((int) $past));
// Remove expired sessions from the database.
$this->db->setQuery($query);
return (bool) $this->db->execute();
}
/**
* Do delete action, this method should be override by sub class.
*
* @param string $table The table name.
* @param mixed $conditions Where conditions, you can use array or Compare object.
*
* @throws \Exception
* @return boolean Will be always true.
*/
public function delete($table, array $conditions = array())
{
$query = $this->db->getQuery(true);
// Conditions.
QueryHelper::buildWheres($query, $conditions);
$query->delete($table);
return $this->db->setQuery($query)->execute();
}
/**
* Validate that the primary key has been set.
*
* @return boolean True if the primary key(s) have been set.
*
* @since 2.0
*/
public function hasPrimaryKey()
{
if ($this->autoIncrement) {
$empty = true;
foreach ($this->keys as $key) {
$empty = $empty && !$this->{$key};
}
} else {
$query = $this->db->getQuery(true);
$query->select('COUNT(*)')->from($this->table);
$this->appendPrimaryKeys($query);
$this->db->setQuery($query);
$count = $this->db->loadResult();
if ($count == 1) {
$empty = false;
} else {
$empty = true;
}
}
return !$empty;
}
/**
* Batch update some data.
*
* @param string $table Table name.
* @param array $data Data you want to update.
* @param mixed $conditions Where conditions, you can use array or Compare object.
* Example:
* - `array('id' => 5)` => id = 5
* - `new GteCompare('id', 20)` => 'id >= 20'
* - `new Compare('id', '%Flower%', 'LIKE')` => 'id LIKE "%Flower%"'
*
* @return boolean True if update success.
*/
public function updateBatch($table, $data, $conditions = array())
{
$query = $this->db->getQuery(true);
// Build conditions
$query = QueryHelper::buildWheres($query, $conditions);
// Build update values.
$fields = array_keys($this->db->getTable($table)->getColumns());
$hasField = false;
foreach ((array) $data as $field => $value) {
if (!in_array($field, $fields)) {
continue;
}
$query->set($query->format('%n = %q', $field, $value));
$hasField = true;
}
if (!$hasField) {
return false;
}
$query->update($table);
return $this->db->setQuery($query)->execute();
}
