node.js - mongoose insert data with promise -

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My goal is to include a new country (with increased country_id) in DB if it does not exist. In that situation, I am trying to find the country's largest country ID and try to enter a new country with country_id + 1. Otherwise I do not do anything The

readFile readfile, filetoArray change a promise that file content in an array that is, Prosesmap store in Mongodb what we know works projects each array element and fixed or No

The problem is:

  Promise. Launch (Country.FindOn ({}). Sort ({'zid': -1}). Exec ()  

always gives me the same result, whenever any data first the same is inserted into the database ...

  var mongoose = require ( 'mongoose'); var schema = mongoose.Schema; var countrySchema = new schema ( {Zn: {type: string}, essential: true}, zid: {type: number, essential: true}}); Wired promise = required ('bluebird'); Function Processmap (Data) {Return Promise. Bid (data) Then (insertCountry);} var insertCountry = function () {var googledata = this; // Tie the promise back from the PR Omise.promisifyAll (Country.findOne ({zn: googledata.country}) .exec ()). Then (function (dbdata) {return {dbdata: dbdata, googledata: googledata};}) .then (insertCountryIfNotExist)} var insertCountryIfNotExist = function (data) {return promise.promisifyAll (country.findOne ({}). Sort ({ 'zid': -1}). Exec ()) .then (function (D) {var newc = new country ({zn: data.googledata.country, zid: d.zid + 1}); return promise. Pramosting All (newc.saveAsync ())}); } // The main code is read here file (file). Then (filetoArray) .map (processMap, {concurrency: 1}) // after that end. Then (function (data) console.log ('done');} Actually returns inherited from Exec, there is no need to use blubber on your case.