AlithAnar / my-mongo

my-mongo is a Node.js module that handles MongoDb connections (via the connect function). If a connection exist, use it, otherwise create a new connection. You can define your own functions and redefine existing functions.

Introduction

my_mongo handles MongoDb connections (via the connect function). If a connection exist, use it, otherwise create a new connection. You can define your own functions and redefine existing functions.

Installation

npm install my-mongo

Work in progress, current implemented functions :

mongo.setDebug
mongo.doit
mongo.connect        (uses MongoClient.connect)
mongo.disconnect     (uses db.close)
mongo.insert         (uses db.collection(c).insert)
mongo.update         (uses db.collection(c).update)
mongo.remove         (uses db.collection(c).remove)
mongo.removeById     (uses mongo.remove)
mongo.findOne        (uses db.collection(c).findOne)
mongo.find           (uses db.collection(c).find)
mongo.findById       (uses mongo.findOne)
mongo.dropCollection (uses db.collection(c).drop)

Example :

var my_mongo = require('my-mongo')
var mongo = new my_mongo("mongodb://localhost:27017/db_name", "collection_name");
mongo.setDebug(true);

doc1 = { "name": "doc1", "text": "", "left": 10, "top": 10};
doc2 = { "name": "doc2", "text": "", "left": 20, "top": 20};
doc3 = { "name": "doc3", "text": "", "left": 30, "top": 30};

mongo.insert([doc1, doc2, doc3], function(err, results){
  assert.equal(null, err);
  console.log(results);

  mongo.update({"name": "doc1"}, { "left": 11, "top": 11}, function(err, results){
    console.log(results.result);
  });

  mongo.remove({"name": "doc2"}, function(err, results){
    console.log(results.result);
  });

  mongo.find({}, {}, function(err, results){
    console.log(results);

    mongo.dropCollection(function(err, results){

      mongo.disconnect(function(err){
      })
    });
  });
});

Results :

Connecting to db
Connecting to db
{ result: { ok: 1, n: 3 },
  ops:
   [ { name: 'doc1',
       text: '',
       left: 10,
       top: 10,
       _id: 568a95850e1ae43c1b4be215 },
     { name: 'doc2',
       text: '',
       left: 20,
       top: 20,
       _id: 568a95850e1ae43c1b4be216 },
     { name: 'doc3',
       text: '',
       left: 30,
       top: 30,
       _id: 568a95850e1ae43c1b4be217 } ],
  insertedCount: 3,
  insertedIds:
   [ 568a95850e1ae43c1b4be215,
     568a95850e1ae43c1b4be216,
     568a95850e1ae43c1b4be217 ] }
{ ok: 1, nModified: 1, n: 1 }
{ ok: 1, n: 1 }
[ { _id: 568a95850e1ae43c1b4be215,
    name: 'doc1',
    text: '',
    left: 11,
    top: 11 },
  { _id: 568a95850e1ae43c1b4be217,
    name: 'doc3',
    text: '',
    left: 30,
    top: 30 } ]
Closing connection to db

How-to redefine a function :

mongo.insert = function (docs)
{
  mongo.doit(
    function (db, c, criteria, update, options, callback) {
      db.collection(c).insert(docs, function(err, result) {});
    },    // the "real" function
    null, // selection criteria (inadequate here)
    docs, // update data
    null, // options
    null  // callback function
  );
}
/* No more callback needed for the insert function */
mongo.insert ({"name": "doc4"})