how to create rest api using redmine with nodejs?

is there any idea how can i create rest api using Redmine and nodejs. i used node-redmine but i don't know how to create rest api. i also google but there is no any way because i don't have knowledge about redmine

Redmine already comes with Rest API.

To use API, You need to go in Redmine to Administration | Settings | API and tick Enable rest services and JSONP support, then find your API key under My account, and use it as provided in example document from node-redmine library

var Redmine = require('node-redmine');


var hostname = process.env.REDMINE_HOST || 'redmine.zanran.me';
var config = {
  apiKey: process.env.REDMINE_APIKEY || 'bed1ba0544b681e530c2447341607f423c9c8781'
};

var redmine = new Redmine(hostname, config);

/**
 * Dump issue
 */
var dump_issue = function(issue) {
  console.log('Dumping issue:');
  for (var item in issue) {
    console.log('  ' + item + ': ' + JSON.stringify(issue[item]));
  }
};

To consume it's REST API use instructions and endpoints given here: http://www.redmine.org/projects/redmine/wiki/Rest_api

To create new issue:

/*
 * create issue
 */
var issue = {
  "issue": {
    "project_id": 1,
    "subject": 'Redmine REST API by Node.js',
    "assigned_to_id": 5,
    "notes": "automative update redmine notes by node js",
    "priority_id": 4
  }
};

redmine.create_issue(issue, function(err, data) {
  if (err) throw err;

  console.log(data);
});

If you however still insist to create your own API, then I recommend you connect with nodejs directly to Redmine's database and build your own API, so you don't build proxy for Redmine's API.