when(isset($params['id']) && $params['id'] !== '',function($query) use ($params){ $query->where('id',(int)$params['id']); }) ->when(isset($params['mer_id']) && $params['mer_id'] !== '',function($query) use ($params){ $query->where('mer_id',(int)$params['mer_id']); }) ->with([ 'merchant' => function($query){ $query->field('mer_id,mer_name,mer_avatar'); }, ]) ->order('create_time DESC,id DESC'); } }