MongoDB: How to convert an int array to strings

Question

I want to convert an int array to strings. My int:

"key" : 280

If I have only 1 integer to change i can use:

db.collection.find( { 'key' : { $type : 16 } } ).forEach( function (x) { x.key = ""+x.key; db.collection.save(x);});

$type 16 describes an 32-bit integer. With that code all looks fine.

But if I have an array like:

"key" : 280, 193, 213

and I use this code I get:

"key" : "280,193,213"

but I want -> "key" : "280","193","213"

Have anybody an solution ?

Wizard · Accepted Answer · 2014-09-05 09:20:30Z

1

Please try this:

db.collection.find( { 'key.0' : { $type : 16 } } ).forEach( function (x) {
    var arr = [];
    x.key.forEach( function (e) { arr.push("" + e); } );
    x.key = arr;
    db.collection.save(x);
});

answered Sep 5, 2014 at 9:20

Wizard

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