Loopback support for Node.js

Introduction

This page explains the support of the Loopback external link framework.

Create webservice from Express API

The App extends and supports Express Middleware. Webservice can be supported as API Express framework:

var loopback = require('loopback');
var app = loopback();

// Create get method
app.get('/', function(req,res){
res.send('hello wor;ld')
});

app.listen(3000);

Create webservice from model

Model todo.js:

module.exports = function(Todo) {
  Todo.stats = function(filter, cb) {
  ...
  };
  ...
  Todo.remoteMethod('stats', {
    accepts: {arg: 'filter', type: 'object'},
    returns: {arg: 'stats', type: 'object'},
    http: { path: '/stats' }
  }, Todo.stats);
  ...
}

This will give the following result:

Exposing models over REST

Loopback models automatically have a standard set of HTTP endpoints that provide REST APIs. See https://loopback.io/doc/en/lb3/Exposing-models-over-REST.html external link for more information.

Example: todo.json:

{
  "name": "Todo",
  "base": "PersistedModel",
  "strict": "throw",
  "persisteUndefinedAsNull": true,
  "trackChanges": true,
  "properties": {
    "id": {
      "id": true,
      "type": "string",
      "defaultFn": "guid"
    },
    "title": "string",
    "completed": {
      "type": "boolean",
      "default": false
    },
    "created": {
      "type": "number"
    }
  }
}

This will give the following result: