nedb.md

NeDB

feathers-nedb is a database service adapter for NeDB, an embedded datastore with a MongoDB like API. NeDB can store data in-memory or on the filesystem which makes it useful as a persistent storage without a separate database server.

$ npm install --save nedb feathers-nedb

Important: To use this adapter you also want to be familiar with the database adapter common API and querying mechanism.

API

service(options)

Returns a new service instance initialized with the given options. Model has to be an NeDB database instance.

const NeDB = require('nedb');
const service = require('feathers-nedb');

// Create a NeDB instance
const Model = new NeDB({
  filename: './data/messages.db',
  autoload: true
});

app.use('/messages', service({ Model }));
app.use('/messages', service({ Model, id, events, paginate }));

Options:

• Model (required) - The NeDB database instance. See the NeDB API for more information.
• id (optional, default: '_id') - The name of the id field property. By design, NeDB will always add an _id property.
• events (optional) - A list of custom service events sent by this service
• paginate (optional) - A pagination object containing a default and max page size

params.nedb

When making a service method call, params can contain an nedb property which allows to pass additional NeDB options, for example to allow upsert:

app.service('messages').update('someid', {
  text: 'This message will be either created or updated'
}, {
  nedb: { upsert: true }
});

Example

Here is an example of a Feathers server with a messages NeDB service that supports pagination and persists to db-data/messages:

$ npm install feathers feathers-errors feathers-rest feathers-socketio feathers-nedb nedb body-parser

In app.js:

const NeDB = require('nedb');
const feathers = require('feathers');
const errorHandler = require('feathers-errors/handler');
const rest = require('feathers-rest');
const socketio = require('feathers-socketio');
const bodyParser = require('body-parser');
const service = require('feathers-nedb');

const db = new NeDB({
  filename: './db-data/messages',
  autoload: true
});

// Create a feathers instance.
const app = feathers()
  // Enable REST services
  .configure(rest())
  // Enable Socket.io services
  .configure(socketio())
  // Turn on JSON parser for REST services
  .use(bodyParser.json())
  // Turn on URL-encoded parser for REST services
  .use(bodyParser.urlencoded({extended: true}))
  // Connect to the db, create and register a Feathers service.
  .use('/messages', service({
    Model: db,
    paginate: {
      default: 2,
      max: 4
    }
  }))
  // Set up default error handler
  .use(errorHandler());

// Create a dummy Message
app.service('messages').create({
  text: 'Message created on server'
}).then(message => console.log('Created message', message));

// Start the server.
const port = 3030;

app.listen(port, () => {
  console.log(`Feathers server listening on port ${port}`);
});

Run the example with node app and go to localhost:3030/messages.