function delete() {
Recipe::requirePermission("DELETE");
$query = "DELETE FROM recipe WHERE id=".Database::sqlValue($this->id);
Database::query($query);
$this->deletePhoto();
}
function update() {
Recipe::requirePermission("ADD");
$this->last_update_date = time();
$query = "UPDATE rating SET value=".Database::sqlValue($this->value);
$query .= ", comment=".Database::sqlValue($this->comment);
$query .= ", last_update_date=FROM_UNIXTIME(".Database::sqlValue($this->last_update_date).")";
$query .= " WHERE id=".Database::sqlValue($this->id);
Database::query($query);
//print $query."<p>";
}