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Re:Why we moved from NodeJS to Ruby on Rails by andypants on Monday May 14, 2012 @07:40PM (#3973974)
It's not JSON, it's BSON. BSON supports more data types, which are needed for a proper database (such as object IDs, longs, doubles, binary data, references, etc.)

You still need a driver and a bson serializer if you use node.js.

Re:Why we moved from NodeJS to Ruby on Rails by viscanti on Tuesday May 15, 2012 @12:10AM (#3974843)
Sure. But it's certainly easier than most other languages. It's not a great reason to switch for that, but working with Mongo is fairly trivial in Node.