How to export JSON from MongoDB using Robomongo

Question

So I do not know much about MongoDB. I have RoboMongo using which I connect to a MongoDB. What I need to do is this - there is a collection in that Mon

Answer 1

An extension to Florian Winter answer for people looking to generate ready to execute query.

drop and insertMany query using cursor:

{
    // collection name
    var collection_name = 'foo';

    // query
    var cursor = db.getCollection(collection_name).find({});

    // drop collection and insert script
    print('db.' + collection_name + '.drop();');
    print('db.' + collection_name + '.insertMany([');

    // print documents
    while(cursor.hasNext()) {
        print(tojson(cursor.next()));

        if (cursor.hasNext()) // add trailing "," if not last item
            print(',');
    }

    // end script
    print(']);');
}

Its output will be like:

db.foo.drop();
db.foo.insertMany([
{
    "_id" : ObjectId("abc"),
    "name" : "foo"
}
,
{
    "_id" : ObjectId("xyz"),
    "name" : "bar"
}
]);

Answer 2

You can use tojson to convert each record to JSON in a MongoDB shell script.

Run this script in RoboMongo:

var cursor = db.getCollection('foo').find({}, {});
while(cursor.hasNext()) {
    print(tojson(cursor.next()))
}

This prints all results as a JSON-like array.

The result is not really JSON! Some types, such as dates and object IDs, are printed as JavaScript function calls, e.g., ISODate("2016-03-03T12:15:49.996Z").

Might not be very efficient for large result sets, but you can limit the query. Alternatively, you can use mongoexport.

Answer 3

Expanding on Anish's answer, I wanted something I can apply to any query to automatically output all fields vs. having to define them within the print statement. It can probably be simplified but this was something quick & dirty that works great:

var cursor = db.getCollection('foo').find({}, {bar: 1, baz: 1, created_at: 1, updated_at: 1}).sort({created_at: -1, updated_at: -1});

while (cursor.hasNext()) {
    var record = cursor.next();
    var output = "";
    for (var i in record) {
      output += record[i] + ",";
    };
    output = output.substring(0, output.length - 1);
    print(output);
}

Answer 4

There are a few MongoDB GUIs out there, some of them have built-in support for data exporting. You'll find a comprehensive list of MongoDB GUIs at http://mongodb-tools.com

You've asked about exporting the results of your query, and not about exporting entire collections. Give 3T MongoChef MongoDB GUI a try, this tool has support for your specific use case.

Answer 5

Robomongo's shell functionality will solve the problem. In my case I needed couple of columns as CSV format.

var cursor = db.getCollection('Member_details').find({Category: 'CUST'},{CustomerId :1,Name :1,_id:0})

while (cursor.hasNext()) {
    var record = cursor.next();   
    print(record.CustomerID + "," + record.Name)
}

Output : -------

334, Harison
433, Rechard
453, Michel
533, Pal

Answer 6

you say "export to file" as in a spreadsheet? like to a .csv?

IMO this is the EASIEST way to do this in Robo 3T (formerly robomongo):

1. In the top right of the Robo 3T GUI there is a "View Results in text mode" button, click it and copy everything

2. paste everything into this website: https://json-csv.com/

3. click the download button and now you have it in a spreadsheet.

hope this helps someone, as I wish Robo 3T had export capabilities