MongoDB shell cheatsheet

gistfile1.js

// A bunch of functions you can use in the MongoDB shell
// taken from http://api.mongodb.org/js/1.8.2/index.html
// amongst other sources

// Used in place of print() to view the contents of objects
printjson(x);
printjsononeline(x);

// File system interaction
ls(...);
pwd();
cd(...);
removeFile(...);
mkdir(...);

// Misc
hex_md5('foo');

//basic query
db.stream_objs.find().sort({created_at: -1}).limit(1)

// advanced queries at http://www.mongodb.org/display/DOCS/Advanced+Queries

// ops
db.currentOp()
db.getLastError()
db.mycollection.runCommand("compact")

//replica set commands
!!!rs.initiate()              // NEVER run this except ONCE when you start your FIRST DB
                              // if one rs adds another machine with its own rs,
                              // it will wreck your life

rs.slaveOK()
rs.status()
var cfg = rs.config()         // gets current replica set configuration
delete cfg.members[0].hidden  // deletes a property from the configuration hash
rs.reconfig(cfg)              // replaces current configuration with cfg