Question

我正在尝试在mongo中编写一个查询，将Totalfleetunits转换为整数，然后选择Totalfleetunits大于1000的所有文档。其中一些Totalfleetunit字段中包含字符，因此它应忽略这些文档并仅考虑可以转换为整数的字段。我遇到了很多问题：

到目前为止，这是我的代码。我错过了什么？

 db.car.find($and: [{parseInt(Totalfleetunits) : {$gte: 1000} }, {Totalfleetunits : {$type: 16}}])

这些是我收到的错误。

Error at line 1, position 16: :.
Error at line 1, position 20: parseInt.
Error at line 1, position 28: <missing ')'>.
Error at line 1, position 46: :.
Error at line 1, position 61: }.
Error at line 1, position 62: ,.
Error at line 1, position 95: ].
Error at line 1, position 96: ).

以下是我的mongodb

中的一些文档的示例

        "_id" : ObjectId("5a22c8e562c2e489c5df7186"),
        "2016rank" : 141,
        "Dealershipgroupname" : "Prestige Automotive Group",
        "Address" : "20200 E. Nine Mile Road",
        "City/State/Zip" : "Saint Clair Shores, MI 48080",
        "Phone" : "(586) 773-2369",
        "Companywebsite" : "www.prestigeautomotive.com",
        "Topexecutive" : "Gregory Jackson",
        "Topexecutivetitle" : "president & CEO",
        "Totalnewretailunits" : "6,094",
        "Totalusedunits" : "1,910",
        "Totalfleetunits" : "4,062",
        "Totalwholesaleunits" : 44,
        "Total_units" : "12,110",
        "Total_number_of _dealerships" : 4,
        "Grouprevenuealldepartments*" : "$360,658,677",
        "2015rank" : "?"
}
{
        "_id" : ObjectId("5a22c8e562c2e489c5df7187"),
        "2016rank" : 142,
        "Dealershipgroupname" : "Bowers Automotive Group",
        "Address" : "2146 Chapman Road",
        "City/State/Zip" : "Chattanooga, TN 37421",
        "Phone" : "(423) 664-5790",
        "Companywebsite" : "bowersag.com",
        "Topexecutive" : "Bradley Cobb",
        "Topexecutivetitle" : "president",
        "Totalnewretailunits" : "6,073",
        "Totalusedunits" : "5,518",
        "Totalfleetunits" : "-",
        "Totalwholesaleunits" : "2,360",
        "Total_units" : "13,951",
        "Total_number_of _dealerships" : 10,
        "Grouprevenuealldepartments*" : "$337,435,813",
        "2015rank" : "?"
}

我想要的输出是产生超过1000个总车队单位的所有经销商的总数。

Answer 1

感谢所有建议。我解决了我的问题。我编写了一个for循环来将所有Totalfleetunits解析为整数。然后我的查询工作正常。

//Do conversion first
db.car.find().forEach( function (x) {
x.Totalfleetunits = parseInt(x.Totalfleetunits, 20); 
db.car.save(x);
}); 

//Then run query    
 db.car.find({ $and: [{Totalfleetunits : {$gte: 1000} }, {Totalfleetunits : {$type: 16}}] }).count()

将字段转换为整数以在Mongo中执行比较

1 个答案: