mongodb print json without whitespace i.e. unpretty json

Question

I\'m using mongodb 2.2.0 and am trying to print json in a single line as opposed to \"pretty\" printing using printjson() or find().pretty(). i.e.

Answer 1

Here is what I use from the command line

mongoexport -d $dbname -c $collection -q '{ "id" : -1 }'

Not sure you can /sort /limit it

Answer 2

var cursor = db.collection.find().sort({_id:-1}).limit(10000);
while(cursor.hasNext()){
    printjsononeline(cursor.next());
}

Answer 3

You can always do a JS hack for this:

> db.tg.find().forEach(function(doc){ print(tojson(doc).replace(/(\r\n|\n|\r|\s)/gm, '')); })
{"_id":ObjectId("511223348a88785127a0d13f"),"a":1,"b":1,"name":"xxxxx0"}

Not pretty but works

Answer 4

Try print(tojson()) - there's an example of printing using a cursor in the MongoDB docs.

    var myCursor = db.inventory.find( { type: 'food' } );
    var myDocument = myCursor.hasNext() ? myCursor.next() : null;

    if (myDocument) {
        var myItem = myDocument.item;
        print(tojson(myItem));
    }

Answer 5

if each item has {} brackets and there are no others then split it up on the brackets using a regular expression.

This would split it up into {..} {..} items. But if there are nested {} it would not work.

var res = s.match(/\{(.|\s)*?\}/g);
if(res) for(var x=0;x<res.length;x++){
    // print  res[x].replace(/\s+/g," ");// w/o spaces
}

Answer 6

With "sort" and "limit" , results can be customised. with mongoexport --type=csv , result can be printed into csv file, which can be read in xls or in one line.