public function belongsToMany($model, $table = '', $foreignKey = '', $localKey = '', $alias = [])
{
// 记录当前关联信息
$model = $this->parseModel($model);
$name = Loader::parseName(basename(str_replace('\\', '/', $model)));
$table = $table ?: $this->db()->getTable(Loader::parseName($this->name) . '_' . $name);
$foreignKey = $foreignKey ?: $name . '_id';
$localKey = $localKey ?: Loader::parseName($this->name) . '_id';
return $this->relation()->belongsToMany($model, $table, $foreignKey, $localKey, $alias);
}