Mongoexport date range query result in Failure parsing - mongodb

Question

Trying to run mongoexport and having problems with my query parameter.
mongoexport -d test-copy -c collection -o /home/ubuntu/mongodb-archiving/mongodump/collection.json --query '{"created_at": {\$lte: new Date(1451577599000) } }'
Collection is:
{"created_at" : ISODate("2014-03-07T06:32:19.172Z")}
To which I can query just fine in Mongo Client.
The result in the following error:
Assertion: 10340:Failure parsing JSON string near: "created_a

Answer 1

You have a \ in your query. Please remove it.
--query '{"created_at": {$lte: new Date(1451577599000)}}'

Answer 2

You should use $date with mongoexport:
mongoexport.exe -h *HOST* -p *PORT* -q "{ 'created_at' : { '$lt' : { '$date' : '2014-03-07T06:32:19.172Z' } } }"

Answer 3

Remove the \$lte and change it to quoted "$lt" in your query, and the mongodump shall work fine.
Tested on mongodb 3.0.8
> use appdb
> db.testcoll.find({})
{ "_id" : 1, "created_at" : ISODate("2016-09-15T08:46:12.272Z") }
{ "_id" : 2, "created_at" : ISODate("2016-09-15T08:46:12.272Z") }
{ "_id" : 3, "created_at" : ISODate("2016-09-16T08:46:30.736Z") }
{ "_id" : 4, "created_at" : ISODate("2016-09-16T08:47:12.368Z") }
{ "_id" : 5, "created_at" : ISODate("2016-09-16T08:47:15.562Z") }
> db.testcoll.find({"created_at":{"$lt":new Date("2016-09-16")}})
{ "_id" : 1, "created_at" : ISODate("2016-09-15T08:46:12.272Z") }
{ "_id" : 2, "created_at" : ISODate("2016-09-15T08:46:12.272Z") }
> db.testcoll.find({"created_at":{"$lt":new Date(1473984000)}})
// make sure you are using millisecond version of epoch
> db.testcoll.find({"created_at":{"$lt":new Date(1473984000000)}})
{ "_id" : 1, "created_at" : ISODate("2016-09-15T08:46:12.272Z") }
{ "_id" : 2, "created_at" : ISODate("2016-09-15T08:46:12.272Z") }
Now the mongodump part :
dp#xyz:~$ mongodump -d appdb -c testcoll --query '{"created_at":{"$lt":new Date(1473984000000)}}'
2016-09-16T14:21:27.695+0530 writing appdb.testcoll to dump/appdb/testcoll.bson
2016-09-16T14:21:27.696+0530 writing appdb.testcoll metadata to dump/appdb/testcoll.metadata.json
2016-09-16T14:21:27.708+0530 done dumping appdb.testcoll (2 documents)

Answer 4

The mongoexport and mongodump tools require a valid JSON object for the --query parameter. From https://docs.mongodb.com/manual/reference/program/mongodump/#cmdoption--query:
--query , -q
Provides a JSON document as a query that optionally limits the documents included in the output of mongodump.
You must enclose the query in single quotes (e.g. ') to ensure that it does not interact with your shell environment.
The command failed due to the query parameter you passed into mongoexport, which is not a valid JSON object due to the existence of new Date() which is a Javascript statement.
The required modification is to simply use the example ISODate() object you provided, .e.g:
mongoexport -d test-copy -c collection -o /home/ubuntu/mongodb-archiving/mongodump/collection.json --query '{"created_at": {$lte: ISODate("2014-03-07T06:32:19.172Z") } }'
You just need to replace the contents of the ISODate() with the date you require.