why can mongoexport not parse this JSON when mongo can? - json

Question

this is the query:
mongoexport --host our.dbhost.com --port 27017 --username peter -p clark --collection sent_mails --db dbname --query '{trigger_id:ObjectId( "50c62e97b9fe6a000200000c"), updated_at: {$lt : ISODate("2013-02-28"), $gte : ISODate("2013-02-01") }}'
when I run this command I get:
assertion: 10340 Failure parsing JSON string near: , updated_
any ideas? (i want all records that match the trigger_id that were updated in February.)

Answer 1

as explained in this issue: Mongoexport using $gt and $lt constraints on a date range, you have to use Unix time stamps for date queries in mongoexport
The time stamps have to be in milliseconds
Invoking this in the bash shell would look like this:
let "date_from=`date --utc --date "2013-02-01" +%s` * 1000"
let "date_to=`date --utc --date "2013-03-01" +%s` * 1000"
mongoexport -d test -c xx --query "{updated_at:{\$gte:new Date($date_from),\$lt:new Date($date_to)}}"> xx.json
> connected to: 127.0.0.1
> exported 1 records
The xx colletion contains:
> db.xx.find().pretty()
{
"_id" : ObjectId("5158f670c2293fc7aadd811e"),
"trigger_id" : ObjectId("50c62e97b9fe6a000200000c"),
"updated_at" : ISODate("2013-02-11T00:00:00Z")
}