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sqlnode.jspostgresqlasync-await

La operación INSERT usando Node.js y PostgreSQL no funciona

Estoy creando mi primera aplicación usando Node.js y PostgreSQL. Esta aplicación se conecta a db, crea una tabla, hace un raspado web de un sitio web, inserta información en db y luego se desconecta de db. Estoy tratando de hacerlo usandoasync/await.

El problema es que la operación de inserción no funciona. No hay errores, simplemente tablacoberturas permanece vacío

Este es mi codigo.

app.js:

const postgreSQLlib = require('./middlewares/postgreSQLlib.js')
const scraper = require('./routers/scraper.js');

const start = async function() {
    await console.log('START');

    // connect
    await postgreSQLlib.connect();

    // create tables
    var queryCreateCoverages = {
        text: 'CREATE TABLE IF NOT EXISTS coverages ('+
                'id SERIAL PRIMARY KEY,' +
                'vaccine VARCHAR(64) NOT NULL,' + 
                'country VARCHAR(255) NOT NULL,' +
                'region VARCHAR(255),' +
                'year VARCHAR(4) NOT NULL,' +
                'value VARCHAR(12) NOT NULL);'
    };
    var queryRes = await postgreSQLlib.query(queryCreateCoverages);
    //console.log('Result: ', queryRes);

    // get data
    await scraper.download();

    const query = {
        text: 'SELECT * FROM coverages;',
        values: ['Italy']
    }
    var queryRes = await postgreSQLlib.query(query);
    //console.log('Result: ', queryRes);

    // disconnect 
    await postgreSQLlib.disconnect();

    return 'FINISH';
}

// start application
start()
    .then(function(res) {
        console.log(res);
    })
    .catch(function(err) {
        console.log(err);
    });

postgreSQLlib.js:

var fs = require('fs');
const {Client} = require('pg'); // node-postgres npm package

const userDb = 'admin';
const passDb = 'admin';
const hostDb = 'localhost'; // default
const portDb = '5432'; // default
const nameDb = 'db'; 
const connectionString = 'postgres://' + userDb + ':' + passDb + '@' + hostDb + ':' + portDb + '/' + nameDb; // result is 'postgres://admin:admin@localhost:5432/db';
let client;

var methods = {};

methods.connect = async function() {
    client = new Client({connectionString});
    return await client.connect()
    .then(async function() {
        await console.log('\nConnected to ' + client.database + ' at ' + client.host + ':' + client.port + ' as ' + client.user + ' (pass: ' + client.password + ')');
    })
    .catch(function(err) {
        console.log('\nError during connection to PostgreSQL');
        throw err;
    });
}

methods.query = function(query) {const start = Date.now();
    return client.query(query)
    .then(function(,res) {
        const duration = Date.now() - start;
        console.log('\nExecuted query: {\n  ' + query.text + '\n  [' + query.values + ']' + '\n  duration: '+ duration + '\n  rows: ' + res.rows.length + '\n}');
        return res;
    })
    .catch(function(err) { 
        console.log('\nError executing query', err.stack);
    });
}

methods.disconnect = async function() {
    await client.end()
    .then(function() {
        console.log('\nConnection has ended');
    })
    .catch(function(err) {
        console.log('\nError during clossing connection');
        throw err;
    }); 
}

module.exports = methods;

scraper.js:

var cheerio = require('cheerio');
var request = require('request');
var util = require('../helpers/util.js');
var postgreSQLlib = require('../middlewares/postgreSQLlib.js');

var methods = {};

var countries = {
    'Italy': 'ITA',
    'Latvia': 'LVA',
    'Netherlands': 'NLD'
};

var outDir = './output/';
var finalData = outDir + 'coverage-eu.json'

var jsons = [];

methods.download = async function(req, res) {
    for(country in countries) {
        var url = 'http://apps.who.int/immunization_monitoring/globalsummary/coverages?c=' + countries[country];

        return await request(url, (async function(country) {
            var thisCountry = country;

            return async function(error, res, html) {
                if(error) {
                    throw error;
                }

                $ = cheerio.load(html);

                var years = [];
                var vaccines = [];
                var coverages = [];

                $('.ts .year').each(function() {
                    years.push($(this).text().trim());
                });
                $('.ts .odd td a, .ts .even td a').each(function() {
                    vaccines.push($(this).text().trim());
                });
                $('.ts .odd .statistics_small, .ts .even .statistics_small').each(function() {
                    coverages.push($(this).text().trim());
                });

                const numYears = years.length;
                const numVaccines = vaccines.length;
                for(var vaccineIdx = 0; vaccineIdx < numVaccines; vaccineIdx++) {
                    for(var yearIdx = 0; yearIdx < numYears; yearIdx++) {
                        // save on db
                        const query = {
                            text: 'INSERT INTO coverages (vaccine, country, region, year, value) VALUES ($1, $2, $3, $4, $5);',
                            values: [vaccines[vaccineIdx], country, '', years[yearIdx], coverages[vaccineIdx*numYears + yearIdx]]
                        }
                        var queryRes = await postgreSQLlib.query(query);
                        //console.log('Result: ', queryRes);
                    } 
                }
            } 
        })(country));
    } 
};

module.exports = methods;

¿Por qué? No puedo resolver el error si no se muestran errores.

Cualquier ayuda es apreciada y perdón por mi mal inglés.

EDITAR 1

Si uso el shell de SQL (psql) para insertar registros, funciona:

EDITAR 2

Modifiqué elconsole.log delquery método:

methods.query = async function(query, print) {
    return await client.query(query)
    .then(function(res) {
        console.log(print, 'OK query');
        return res;
    })
    .catch(function(err) { 
        console.log(print, 'ERR query');
    });
}

scraper.js:

methods.download = async function(req, res) {
    for(country in countries) {
        console.log('\nCOUNTRY:', country); // ADDED
        var url = 'http://apps.who.int/immunization_monitoring/globalsummary/coverages?c=' + countries[country];
        let res = await request(url);
        insert(res);
    }
}

//...

// save on db
const queryInsert = {
    text: 'INSERT INTO coverages (vaccine, country, region, year, value) VALUES($1, $2, $3, $4, $5);',
    values: [vaccines[vaccineIdx], country, '', years[yearIdx], coverages[vaccineIdx*numYears + yearIdx]]
}
var printText = '[INSERT ' + country + ' IN coverages]';
var queryRes = await postgreSQLlib.query(queryInsert, printText);

Estas son las impresiones:

START

Connected to db at localhost:5432 as admin (pass: admin)
[CREATE TABLE coverages] OK query

COUNTRY: Italy

COUNTRY: Latvia
[INSERT Italy IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query

COUNTRY: Netherlands
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query
[INSERT Netherlands IN coverages] OK query

Connection has ended

FINISH
[INSERT Netherlands IN coverages] ERR query

Como puede ver, hay un error al final porque la conexión ya está cerrada. Además, las impresiones relacionadas con el resultado de la consulta no se ordenan con respecto al país. Por ejemplo:

COUNTRY: Italy

COUNTRY: Latvia
[INSERT Italy IN coverages] OK query
[INSERT Latvia IN coverages] OK query
[INSERT Latvia IN coverages] OK query

No hay nada debajoPAÍS: Italia, pero los resultados sobre las consultas de Italia están debajoPAÍS: Letonia (Y no hay todos).

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