Importing & Exporting JSON Data To mongoDB!

mongoimport imports JSON, CSV or TSV data to mongoDB. If You are importing JSON data from a file to db, the file should have only one document per line and there shouldn't be any delimiters at the end of file. If You have a file sample.json like this

{"num":1,"status":"ok"}
{"num":2,"status":"ok"}
{"num":3,"status":"ok"}
{"num":4,"status":"ok"}

You can directly import it into db using

mongoimport --db <db> --collections <collection> --file sample.json

This is straight forward and works well. But some third party services provide data in the form of JSON array like this

[
    {"num":1,"status":"ok"},
    {"num":2,"status":"ok"},
    {"num":3,"status":"ok"},
    {"num":4,"status":"ok"},
]

If You try to import it, it throws FailedToParse error. For this, You need to pass additional param jsonArray.

mongoimport --db <db> --collections <collection> --file sample.json --jsonArray

If You want to export Your collection as a json dump, You can use mongoexport command

mongoexport --db <db> --collections <collection> --out sample.json

This exports data into JSON format with one document in a row.

If You pass jsonArray as an optional parameter, it will export the collection as a jsonArray

mongoexport --db <db> --collections <collection> --out sample.json --jsonArray

If You are lazy to type, You can use

mongoexport --d <db> --c <collection> --o sample.json --jsonArray

References:: mongoDB docs - mongoimport, mongoexport