Query and update document in Cloudant

cloudant-query-update.js

//Learn more: https://github.com/cloudant/nodejs-cloudant

//Before querying, you need to create index first
var Cloudant = require('cloudant');
var cloudant = Cloudant({account: 'ACCOUNT', key: 'API-KEY', password: 'PASSWORD'});
var db = cloudant.db.use('DB1');
var index_user = {name:'user', type:'json', index:{fields:['user']}}
db.index(index_user, function(er, response) {
  if (er) throw er;
  console.log('Index creation result: %s', response.result);
});

//Query document by _id
var Cloudant = require('cloudant');
var cloudant = Cloudant({account: 'ACCOUNT', key: 'API-KEY', password: 'PASSWORD'});
var db = cloudant.db.use('DB1');
db.find({selector:{ "_id":"testid" }}, function(err, result) {
  if (err) return console.log(err.message);
  console.log(result);
});

//Update document by _id
var Cloudant = require('cloudant');
var cloudant = Cloudant({account: 'ACCOUNT', key: 'API-KEY', password: 'PASSWORD'});
var db = cloudant.db.use('DB1');
db.find({selector:{ "_id":"testid" }}, function(err, result) {
  if (err) return console.log(err.message);
  console.log('Find completed: ' + JSON.stringify(result));
  db.insert({ _id: 'testid',  user: 'ahgood', _rev: result.docs[0]._rev }, function(err, data) {
    if (err) return console.log(err.message);
    console.log('Insert completed: ' + data);
  });
});