如何查询下面的文件，找到所有ev = 1

Question

我想在下面的文档中查询以查找email_info子集的所有ev

{ 
    "_id" : ObjectId("56e13dc9abdb1c233db92dff"), 
    "customer_id" : NumberInt(8383), 
    "customerdetails" : {
        "name" : "Myth 2016", 
        "email_info" : {
            "email" : "myth1926@gmail.com", 
            "ev" : NumberInt(1)
        }, 
        "mobile_userid" : "3#102103293090775998087", 
        "usertype" : "non-anon", 
        "loginmode" : "GooglePlus"
    }
}

我正在使用

db.customer_detail.find({"email_info.ev":1});

但它没有给我结果。

Answer 1

您必须包含所有路径：

db.customer_detail.find({"customerdetails.email_info.ev":1});