MongoQ

Use mongoDB like this:

mongoq("testdb").collection("users").find().toArray().done( function(docs){} ).fail( function(err){} );

Base on node-mongodb-native

Features

• Standard [connection string format][connection string]
• Full node-mongodb-native methods supports
• Chainable api
• Introduce into jQuery Deferred which is based on the CommonJS Promises/A design. => v0.2
• Control-flow => v0.2

Installation

npm install mongoq

Example

var assert = require("assert")
	, mongoq = require("../index.js")
	, db = mongoq("mongodb://127.0.0.1:27017/mongoqTest")
	, User = db.collection("users");

User.remove() //clear test date
	.done( function() {
		User.insert( [{ _id: 1, name: "Jack", age: 22 }, { _id: 2, name: "Lucy", age: 20 }] ) //Add Jack and Lucy
			.and( User.insert( { _id: 3, name: "Mike", age: 21 } ) ) //Add Mike synchronous
			.and( function(u1, u2) {
				// Will find after add Jack, Lucy and Mike
				return User.findOne( { name: u2[0]["name"] } )
			} )
			.done( function(u1, u2, u3) { //All be done
				assert.deepEqual( u1, [{ _id: 1, name: "Jack", age: 22 }, { _id: 2, name: "Lucy", age: 20 }], "Insert first" );
				assert.deepEqual( u2, [{ _id: 3, name: "Mike", age: 21 }], "insert second" );
				assert.deepEqual( u3, { _id: 3, name: "Mike", age: 21 }, "Find after insert" );
				db.close();
			} )
			.fail( function( err ) { // Any error occur
				console.log( err );
			} );
	} )
	.fail( function( err ) { // Faild to remove
		console.log( err );
	} );

Work like node-mongodb-native

Mongoq bridge all the methods and events from mongodb native database and mongodb native collections, and make it chainable.

###Access BSON

var mongoq = require("mongoq");

var BSON = mongoq.BSON;
var ObjectID = BSON.ObjectID;

###Database

Provide a simple [connection string][connection string]

var mongoq = require("mongoq");

//use default server localhost:27017, poolSize 1
var db = mongoq("testdb"); 

//use options
db = mongoq("testdb", {host: "127.0.0.1", port: "27017"}); 

//connection string
db = mongoq("mongodb://localhost/testdb"); 

// Connect and login to the "testdb" database as user "admin" with passowrd "foobar"
db = mongoq("mongodb://admin:foobar@localhost:27017/testdb?poolSize=2");

//Repl set servers
db = mongoq("mongodb://admin:foobar@localhost:27017,localhost:27018/testdb?reconnectWait=2000;retries=20");

//Add user
db.addUser("admin", "foobar", function(err) {});

methods

• close(callback)
• admin(callback)
• collectionNames(collectionName?, callback)
• collection(collectionName, options?, callback)
• collections(callback)
• dereference(dbRef, callback)
• logout(options, callback) Logout user from server, Fire off on all connections and remove all auth info
• authenticate(username, password, callback)
• addUser(username, password, callback)
• removeUser(username, callback)
• createCollection(collectionName, options?, callback)
• dropCollection(collectionName, callback)
• renameCollection(fromCollection, toCollection, callback)
• lastError(options, connectionOptions, callback)
• error(options, callback)
• lastStatus(callback)
• previousErrors(callback)
• executeDbCommand(commandHash, options?, callback)
• executeDbAdminCommand(commandHash, callback)
• resetErrorHistory(callback)
• createIndex(collectionName, fieldOrSpec, options?, callback) Create an index on a collection
• ensureIndex(collectionName, fieldOrSpec, options?, callback) Ensure index, create an index if it does not exist
• dropIndex(collectionName, indexName, callback) Drop Index on a collection
• indexInformation(collectionName, options..., callback)
• dropDatabase(callback)
• cursorInfo(callback) Fetch the cursor information
• executeCommand(dbCommand, options, callback)

###Collection

var mongoq = require("mongoq");
var db = mongoq("mongodb://localhost/testdb"); 
var users = db.collection("users");
users.insert({name: "Jack", phone: 1234567, email: "[email protected]"});

methods

• insert (docs, options?, callback?)
• remove (selector?, options?, callback?)
• rename (newName, callback)
• insertAll (docs, options?, callback?)
• save (doc, options?, callback?)
• update (selector, document, options?, callback?) // options:upsert,multi,safe
• distinct (key, query?, callback?)
• count (query?, callback)
• drop (callback)
• findAndModify (query, sort, doc, options?, callback?) // options: remove,unshift,new
• find () //return Cursor
• findOne (queryObject, options?, callback)
• createIndex (fieldOrSpec, options, callback?)
• ensureIndex (fieldOrSpec, options, callback?)
• indexInformation (options, callback)
• dropIndex (name, callback)
• dropIndexes (callback)
• mapReduce (map, reduce, options, callback)
• group (keys, condition, initial, reduce, command, callback)
• options (callback)

###Cursor

var mongoq = require("mongoq");
var db = mongoq("mongodb://localhost/testdb"); 
var users = db.collection("users");
var cursor = users.find();
cursor.toArray(function(err, users){
	db.close();
});

methods

• toArray(callback)
• each(callback)
• count(callback)
• sort(keyOrList, direction) //=> this
• limit(limit) //=> this
• skip(limit) //=> this
• batchSize(limit) //=> this
• nextObject(callback)
• getMore(callback)
• explain(callback)

MongoQ style

###Deferred Object

MongoQ introduce into jQuery Deferred since v0.2, you can find more documents about jQuery Deferred Object at here.

MongoQ make all mongodb asynchronous processes to return with a Promise Object.

var mongoq = require("mongoq");
var db = mongoq("mongodb://localhost/testdb"); 
var users = db.collection("users");
users.find().toArray()
    .done( function( docs ) { 
        //=> users
    } )
    .done( function( docs ) { 
        //=> users
    } )
    .fail( function( error ) { 
        //=> error
    } )
    .then( function( docs ) { 
        //=> users
    }, function( error ) { 
        //=> error
    } );

methods

• done( doneCallbacks [, doneCallbacks] ) //=> Add handlers to be called when the Deferred object is resolved.
• fail( failCallbacks [, failCallbacks] ) //=> Add handlers to be called when the Deferred object is rejected.
• then( doneCallbacks, failCallbacks ) //=> Add handlers to be called when the Deferred object is resolved or rejected.
• always( alwaysCallbacks ) //=> Add handlers to be called when the Deferred object is either resolved or rejected.

Notice: Please don't use find().each().done(..., the callbacks will be called only once.

###Control-flow

MongoQ add two methods called and and next to the Promise Object for the mongodb's parallel execution, serial execution and error handling painless.

and: run promise object series or parallel and then serialize the result

var mongoq = require("mongoq");
var db = mongoq("mongodb://localhost/testdb"); 
var users = db.collection("users");
var messages = db.collection("messages");
users.count()
    .and( users.findOne() ) // parallel
    .and( function( user ) { // serial when in function
        return user ? messages.find({ user: user._id }).toArray() : [];
    } )
    .done( function( num, user, msgs ) {
        //num from users.count
        //user from users.findOne
        //msgs from messages.find
    } )
    .fail( function( err ) {} );

next: run promise object series then give the result to the next

var mongoq = require("mongoq");
var db = mongoq("mongodb://localhost/testdb"); 
var users = db.collection("users");
var messages = db.collection("messages");
users.findOne()
    .next( function( user ) { // serial when in function
        return user ? messages.find({ user: user._id }).toArray() : [];
    } )
    .done( function( msgs ) {
        //msgs from messages.find
    } )
    .fail( function( err ) {} );

Contributor

• Caio Ribeiro Pereira ([email protected])

License

(The MIT License)

Copyright (c) 2011 hidden <[email protected]>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.