access-mongo

Simple MongoDB wrapper. Will present a consistent promised API for both MongoDB and NEDB databases.

This will be incredibly useful for testing using local files rather than actual MongoDB instances. This will also be very useful for using a MongoDB-like database for work that can use simple flat files. In this case your fixtures can just be the NEDB files, which are an extended form of JSON.

Installation

npm install --save access-mongo

Usage

var AccessMongo = require('access-mongo');

AccessMongo.connect('mongodb://foo:[email protected]:1234/mydb').then(function() {
  // create a model for collection users
  var User = AccessMongo.createModel('users');

  User.where({name: 'Matt'}).then(function(user) {
    console.log(user);
  });
});

// connect to multiple databases
AccessMongo.connect({
  foo: 'mongodb://foo:[email protected]:1234/mydb',
  bar: 'mongodb://foo:[email protected]:1234/otherdb'
}).then(function() {
  var FooUser = AccessMongo.createModel('users', {connection: 'foo'});
  var BarUser = AccessMongo.createModel('users', {connection: 'foo'});
});

// override query parameters of all connections
AccessMongo.connect({
  foo: 'mongodb://foo:[email protected]:1234/mydb',
  bar: 'mongodb://foo:[email protected]:1234/otherdb'
}, {
  maxPoolSize: 3
});

// create an nedb database
AccessMongo.connect('test.db').then(function() {
  var User = AccessMongo.createModel('users');

  User.where({name: 'Matt'}).then(function(user) {
    console.log(user);
  });
});

Primary API

AccessMongo

AccessMongo is a singleton that manages the connection state to each database you connect to. You can connect to one or multiple databases. Each connection has a name that you can use to refer to it later. If you don't specify a name the connection name will be default.

Connecting to a single database

Returns a promise that resolves to the instance of AccessMongo.

AccessMongo.connect('mongodb://localhost:27017/test-db');

Connecting to a multiple databases

Returns a promise that resolves to the instance of AccessMongo.

AccessMongo.connect({
  default: 'mongodb://localhost:27017/test-db',
  foo: 'mongodb://foo:[email protected]:27019/some-db'
});

Disconnecting from all databases

Returns a promise that resolves to the instance of AccessMongo.

AccessMongo.disconnect();

Creating a model

Returns a Model object.

// create a model stored in the 'users' collection
var User = AccessMongo.createModel('users');

// create a model stored in the 'users' collection, 'foo' connection, default database
var User = AccessMongo.createModel('users', {connection: 'foo'});

// create a model stored in the 'users' collection, 'default' connection, 'other-db' database
var User = AccessMongo.createModel('users', {database: 'other-db'});

// create a model stored in the 'users' collection, 'foo' connection, 'other-db' database
var User = AccessMongo.createModel('users', {connection: 'foo', database: 'other-db'});

Model

Creating a query

// create a query
var query = User.where({name: 'Matt Insler'});

// add to a query
query.where({email: '[email protected]'});

Modifying a query

// skip
User.skip(5);
User.where({...}).skip(5);

// limit

// fields
User.fields({name: 1, address});        // only include name and address
User.where({...}).fields({timestamp: 0}); // omit timestamp

// sort
User.sort({name: 1});             // sort by name ascending
User.where({...}).sort({name: -1}); // sort by name descending

Fetching data from a query

// fetch the first document matching this query
User.first().then(function(user) {

});
User.where({...}).then(function(user) {

});

// fetch all documents matching this query
User.array().then(function(users) {

});
User.where({...}).array().then(function(users) {

});

// Create a cursor for this query
var cursor = User.cursor();
var cursor = User.where({...}).cursor();

// Count the documents matching this query
User.count().then(function(count) {

});
User.where({...}).count().then(function(count) {

});

// Get a list of distinct values of the field matching this query
User.distinct('name').then(function(distinctNames) {

});
User.where({...}).distinct('name').then(function(distinctNames) {

});

Inserting/updating documents

// Insert a document, will not update
User.create({...}).then(function(savedDocument) {

);
// Insert multiple documents, will not update
User.create([{...}, {...}]).then(function(arrayOfSavedDocuments) {

);

// Save a document, doing an update if the document has an '_id' field, and an insert if not
User.save({...}).then(function(savedDocument) {

});

// Update a single document matching the query
// options: http://mongodb.github.io/node-mongodb-native/1.4/api-generated/collection.html#update
User.update(query, update, options).then(function(numDocumentsChanged, details) {
  // check details.updatedExisting to see if objects were inserted or updated (when using {upsert: true})
});
// Update a single document matching the query from the where({...})
User.where({...}).update(update, options).then(function(numDocumentsChanged, details) {

});


User.where({...}).firstAndUpdate(update, options).then(function(fetchedDocument) {

});

Removing documents

// To prevent you from removing all documents by accident, this will throw an Error
User.remove();

// To remove all documents you can override this failsafe
User.remove({ override: true });

// Remove all documents matching this query
User.where({...}).remove().then(function(numDocumentsRemoved) {

});

Lower-level API

AccessMongo

Get the default connection

Returns the default connection object if there is a one or null.

This is the equivalent of AccessMongo.getConnection('default').

var connection = AccessMongo.getDefaultConnection();

Get a connection by name

Returns the connection object by name or null.

var connection = AccessMongo.getConnection('foo');

Connection

Get the default database

var db = connection.getDefaultConnection();

Get a database by name

var db = connection.getDatabase('my-db');

Disconnect this connection

connection.disconnect();

Database

Get a collection from the database

var collection = db.getCollection('users');

License

Copyright (c) 2015 Matt Insler Licensed under the MIT license.