将字段转换为整数以在Mongo中执行比较

  • Z时代
  • 2024-01-10
  • 分类：问答

我正在尝试在mongo中编写一个查询，它将Totalfleetunits转换为一个整数，然后选择Totalfleetunits大于1000的所有文档。一些Totalfleetunit字段中包含字符，所以它应该忽略这些文档，只考虑可以转换为整数的字段。我遇到了很多问题：将字段转换为整数以在Mongo中执行比较

这是我的代码到目前为止。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:).

这里是我的MongoDB

 "_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" : "?" 
}

我想输出是它产生有超过1000加总船队的所有经销店的总数中的一些文件的例子单位。

回答：

感谢您的所有建议。我解决了我的问题。我写了一个for循环将所有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()

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