baucis

baucis v0.3.1

*** WORK IN PROGRESS ***

Baucis is Express middleware for automatically creating REST services from Mongoose schemata.

Like Baucis and Philemon of old, this library provides REST to the weary traveler. The goal is to create a JSON REST API for Mongoose that matches as closely as possible the richness and versatility of the HTTP 1.1 protocol.

Those versions published to npm represent release versions. Those versions not published to npm are development releases.

Relase versions of baucis can be considered stable. (Please report issues on GitHub if bugs are encountered.)

The API is subject to change. (Baucis uses semver.)

David Rijckaert - Philemon and Baucis Giving Hospitality to Jupiter and Mercury

Usage

To install:

npm install baucis

An example of creating a REST API from a Mongoose schema:

// Define a Mongoose schema
var Vegetable = new mongoose.Schema({
  name: String
});

mongoose.model('vegetable', Vegetable);

// Create routes for the schema
baucis.rest({
  singular: 'vegetable'
});

// Create the app and listen for API requests
var app = express();
app.use('/api/v1', baucis());
app.listen(80);

Later, make requests:

• GET /api/v1/vegetables/:id — get the addressed document

• PUT /api/v1/vegetables/:id — create or update the addressed document

• DEL /api/v1/vegetables/:id — delete the addressed object

• GET /api/v1/vegetables — get all documents

• POST /api/v1/vegetables — creates a new document and sends back its ID

• PUT /api/v1/vegetables — replace all documents with given new documents

• DEL /api/v1/vegetables — delete all documents

Use plain old Connect/Express middleware, including pre-existing modules like passport. For example, set the all option to add middleware to be called before all the model's API routes.

baucis.rest({
  singular: 'vegetable',
  all: function (request, response, next) {
    if (request.isAuthenticated()) return next();
    return response.send(401);
  }
});

Or, set some middleware for specific HTTP verbs or disable verbs completely:

baucis.rest({
  singular: 'vegetable',
  get: [middleware1, middleware2],
  post: middleware3,
  del: false,
  put: false
});

baucis.rest returns an instance of the controller created to handle the schema's API routes.

var subcontroller = baucis.rest({
  singular: 'bar',
  basePath: '/:fooId/bars'
  publish: false, // don't add API routes automatically
  restrict: function (query, request) {
    // Only retrieve bars that are children of the given foo
    query.where('parent', request.params.fooId);
  }
});

var controller = baucis.rest({
  singular: 'foo',
  configure: function (controller) {
    // Embed the subcontroller at /foos/:fooId/bars
    controller.use(subcontroller);

    // Embed arbitrary middleware at /foos/qux
    controller.use('/qux', function (request, response, next) {
      // Do something cool…
      next();
    });
  }
});

Controllers are Express apps, so do whatever you want with them.

var controller = baucis.rest({
  singular: 'robot',
  configure: function (controller) {
    // Add middleware before all other rotues in the controller
    controller.use(express.cookieParser());
  }
});

// Add middleware after default controller routes
controller.use(function () { ... });
controller.set('some option name', 'value');
controller.listen(3000);

Baucis uses the power of Express, without getting in its way. It's meant to be a way to organize your REST API's Express middleware.

Also note that Mongoose middleware will be executed as usual.

Vegetable.pre('save', function () { ... });

Examples

Requests to the collection (not its members) take standard MongoDB query parameters to filter the documents based on custom criteria.

Examples with jQuery:

$.getJSON('/api/v1/vegetables/4f4028e6e5139bf4e472cca1', function (data) {
  console.log(data);
});

$.ajax({
  type: 'POST',
  dataType: 'json',
  url: '/api/v1/vegetables',
  data: { name: 'Potato' }
}).done(function (vegetable) {
  console.dir(vegetable);
});

$.ajax({
  type: 'GET',
  dataType: 'json',
  url: '/api/v1/vegetables',
  data: { query: JSON.stringify({ color: 'red' }) }
}).done(function (vegetables) {
  console.dir(vegetables);
});

An example with Backbone:

var Vegetables = Backbone.Collection.extend({
  url: '/vegetables',
  baucis: function (query) {
    return this.fetch({ data: { query: JSON.stringify(query) } });
  }
});

var Vegetable = Backbone.Model.extend({
  urlRoot: '/vegetables'
});

var redVeges = new Vegetables();
redVeges.baucis({ color: 'red' }).then(function () { ... });

Contact Info

• http://kun.io/
• @wprl

© 2012-2013 William P. Riley-Land