bedrock-mongodb
A bedrock module that creates a simple MongoDB database and provides an easy API for creating and working with its collections.
Requirements
- npm v3+
Quick Examples
npm install bedrock-mongodb
Below is an example that simply opens a collection when the database is ready
and then runs a query and prints the result. A more common use case for a
module that uses bedrock-mongodb
would be to expose its own API that hides
the details of using whatever collections it has opened.
var bedrock = require('bedrock');
var database = require('bedrock-mongodb');
// custom configuration
bedrock.config.mongodb.name = 'my_project_dev'; // default: bedrock_dev
bedrock.config.mongodb.host = 'localhost'; // default: localhost
bedrock.config.mongodb.port = 27017; // default: 27017
bedrock.config.mongodb.username = 'my_project'; // default: bedrock
bedrock.config.mongodb.password = 'password'; // default: password
// the mongodb database 'my_project_dev' and the 'my_project' user will
// be created on start up following a prompt for the admin user credentials
// alternatively, use `mongodb` URL format:
bedrock.config.mongodb.url = 'mongodb://localhost:27017/my_project_dev';
// enable local collection if a local database is available
// the local database has similar options to primary database
// see lib/config.js for details
// bedrock.config.mongodb.local.enable = true; // default: false
// open some collections once the database is ready
bedrock.events.on('bedrock-mongodb.ready', function(callback) {
database.openCollections(['collection1', 'collection2'], function(err) {
if(err) {
return callback(err);
}
// do something with the open collection(s)
database.collections.collection1.find({id: 'foo'}, function(err, result) {
if(err) {
return callback(err);
}
console.log('result', result);
callback();
});
});
});
bedrock.start();
Configuration
For documentation on database configuration, see config.js.
Connecting and Authenticating
MongoDB's documentation offers tons of great examples on how to authenticate using a myriad number of connection strings.
Mongo Node 3.5 Driver connect docs
Mongo Node 3.5 Driver atlas docs
You can also connect to access-enabled mongo servers using some small changes to the
config.mongodb.connectOptions
:
const {config} = require('bedrock');
config.mongodb.username = 'me';
config.mongodb.password = 'password';
const {connectOptions} = config.mongodb;
// optional, only required if connecting to a replicaSet
connectOptions.replicaSet = 'my_provider_replica_set';
// optional, but required in production by many providers
connectOptions.ssl = true;
// optional, only required if your provider requires tls
connectOptions.tls = true;
// the `authSource` option replaces the older `authDB` option
// it should be specified or else it will be the `mongodb.name`
connectOptions.authSource = 'my_provider_auth_db';
MongoDB provides excellent docs on their connection strings
You can connect using a url by setting:
config.mongodb.url = 'mongodb://myDBReader:D1fficultP%40ssw0rd@mongodb0.example.com:27017/?authSource=admin';
Requirements
- Linux or Mac OS X (also works on Windows with some coaxing)
- node.js >= 6.x.x
- npm >= 1.4.x
- mongodb ~= 3.x
- libkrb5-dev >= 1.x.x
Setup
- Ensure an admin user is set up on mongodb. To do so, follow the instructions at mongodb.org for your version of MongoDB. Version 4.2.x is currently supported.
- [optional] Tweak your project's configuration settings; see Configuration or Quick Examples.
API
collections
An object whose keys are the names of the collections that have been
opened via openCollections
.
openCollections(collections, callback)
Opens a set of collections (creating them if necessary), if they aren't already
open. Once all of the collections are open, callback
is called. If an error
occurs, callback
is called immediately with the error. If no error occurs,
then once the callback
has been called, collections
object will have keys
that match the collection names and values that are instances of
mongodb-native
Collection.
createGridFSBucket(options)
Creates and returns a new GridFSBucket
from the native driver. Options are
the same as for GridFSBucket
. The current client is used and the
writeConcern
option defaults to the writeOptions
config value.
Test Mode
Drop Collections on Initialization
When doing testing, it is often desirable to have empty collections at the beginning of test operations. This may be accomplished by the following configuration parameters IN ADDITION to specifying the test parameter on the command line. The test configuration in a project should ALWAYS specify a UNIQUE mongodb database.
// Always specify a unique mongodb database for testing
bedrock.config.mongodb.name = 'my_project_test';
bedrock.config.mongodb.host = 'localhost';
bedrock.config.mongodb.port = 27017;
bedrock.config.mongodb.username = 'test'; // default: bedrock
bedrock.config.mongodb.password = 'password';
// drop collections on initialization
bedrock.config.mongodb.dropCollections.onInit = true;
// if 'onInit' is specified, 'collections' must also be specified
// if collections is an empty array, ALL collections will be dropped
bedrock.config.mongodb.dropCollections.collections = [];