您好，我的mongo集合包含以下文档:{"_id":ObjectId("539efd5b254bb5f65c9da94e"),"iInfo":[{"ifout":0,"iferror":0,"ifdes":"N/A","ifin":0},{"ifout":0,"iferror":10,"ifdes":"N/A","ifin":0},{"ifout":0,"iferror":4,"ifdes":"N/A","ifRemotePort":"0","ifin":0},{"ifout":0,"iferror":0,"ifdes":"N/A","ifin":0}]}{"_id":ObjectId