Mongo import data type - mongodb

Question

I am importing data into mongodb by this command
mongoimport -d dataBase --collection ip2location --type csv --file "/home/oodles/git/csv/IP2LOCATION-LITE-DB11.CSV" --fields _id,ipFrom,ipTo,countryCode,countryName,regionName,cityName,latitude,longitude,zipCode,timeZone
import is successfull
but the problem is
db.ip2Location.find().pretty()
getting
"_id" : ObjectId("52be7f25c80e0735273985bf"), ///here is requirement need "_id" : NumberLong(1)
"ipFrom" : NumberLong(16777216),
"ipTo" : NumberLong(16777471),
"countryCode" : "AU",
"countryName" : "AUSTRALIA",
"regionName" : "QUEENSLAND",
"cityName" : "SOUTH BRISBANE",
"latitude" : -27.48333,
"longitude" : 153.01667,
"zipCode" : 4101,
"timeZone" : "+10:00"
first line is "_id" : ObjectId("52be7f25c80e0735273985bf"),
but I need like this: "id" : NumberLong(1)
cvs data sample
"16777216","16777471","AU","AUSTRALIA","QUEENSLAND","SOUTH BRISBANE","-27.483330","153.016670","4101","+10:00"

Answer 1

csv data sample
"16777216","16777471","AU","AUSTRALIA","QUEENSLAND","SOUTH BRISBANE","-27.483330","153.016670","4101","+10:00"
The sample line doesn't match the list of --fields provided; it has one field less. The first field should be the _id you want to use (or 1 per your example).
Corrected line:
1, "16777216","16777471","AU","AUSTRALIA","QUEENSLAND","SOUTH BRISBANE","-27.483330","153.016670","4101","+10:00"
I tested and this works as expected in MongoDB 2.0.4.
I can't reproduce your results of having the _id added automatically with the first field value missing; when I tried with MongoDB 2.0.4 it assigned values to fields in the order listed so that the _id became 16777216, ipFrom was 16777471, etc. I suspect you may have been viewing a document inserted in an earlier mongoimport run where your --fields list did not include _id.
You should also be aware that mongoimport only inserts data (it does not do updates or upserts). If there is already a document with the given _id than mongoimport will ignore that line of your CSV.
An easier way to keep the fields and CSV data in sync is to have the list of fields as the first line in your CSV and then use mongoimport --headerline ... instead of --fields.