Невозможно подключиться к базе данных: TypeError: net .Socket не является конструктором - PullRequest
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Невозможно подключиться к базе данных: TypeError: net .Socket не является конструктором

0 голосов
/ 20 апреля 2020

Я пытаюсь подключиться к базе данных postgres (Postgresql -11) в моем приложении nodejs - vue. js, но в консоли я получаю эту ошибку: 

[HMR] Waiting for update signal from WDS...
pg.js?c8c2:27 Unable to connect to the database: TypeError: net.Socket is not a constructor
    at new Connection (webpack-internal:///./node_modules/pg/lib/connection.js:22:34)
    at new Client (webpack-internal:///./node_modules/pg/lib/client.js:55:37)
    at Promise.tap.query (webpack-internal:///./node_modules/sequelize/lib/dialects/postgres
/connection-manager.js:124:26)
    at ConnectionManager.connect (webpack-internal:///./node_modules/sequelize/lib/dialects
/postgres/connection-manager.js:121:12)
    at eval (webpack-internal:///./node_modules/sequelize/lib/dialects/abstract/connection-
manager.js:318:50)
From previous event:
    at ConnectionManager._connect (webpack-internal:///./node_modules/sequelize/lib/dialects
/abstract/connection-manager.js:318:8)
    at ConnectionManager.getConnection (webpack-internal:///./node_modules/sequelize/lib/dialects
/abstract/connection-manager.js:254:46)
    at eval (webpack-internal:///./node_modules/sequelize/lib/sequelize.js:640:36)
From previous event:
    at eval (webpack-internal:///./node_modules/sequelize/lib/sequelize.js:631:53)
    at eval (webpack-internal:///./node_modules/retry-as-promised/index.js:70:21)
    at new Promise (<anonymous>)
    at retryAsPromised (webpack-internal:///./node_modules/retry-as-promised/index.js:60:10)
    at eval (webpack-internal:///./node_modules/sequelize/lib/sequelize.js:631:30)
From previous event:
    at Sequelize.query (webpack-internal:///./node_modules/sequelize/lib/sequelize.js:580:23)
    at Sequelize.authenticate (webpack-internal:///./node_modules/sequelize/lib/sequelize.js:892:17)
    at eval (webpack-internal:///./src/plugins/db/pg.js:23:11)
    at Object../src/plugins/db/pg.js (https://ggc.world/js/app.js:1128:1)
    at __webpack_require__ (https://ggc.world/js/app.js:785:30)
    at fn (https://ggc.world/js/app.js:151:20)
    at eval (webpack-internal:///./src/main.js:16:72)
    at Module../src/main.js (https://ggc.world/js/app.js:1083:1)
    at __webpack_require__ (https://ggc.world/js/app.js:785:30)
    at fn (https://ggc.world/js/app.js:151:20)
    at Object.1 (https://ggc.world/js/app.js:1141:18)
    at __webpack_require__ (https://ggc.world/js/app.js:785:30)
    at checkDeferredModules (https://ggc.world/js/app.js:46:23)
    at https://ggc.world/js/app.js:861:18
    at https://ggc.world/js/app.js:864:10

В /src/main.js: 

import '@/plugins/db/pg';

(base) /src/plugins/db$ ls -lah
total 28K
drwxr-xr-x 6 marco marco 4,0K apr 20 15:42 .
drwxr-xr-x 3 marco marco 4,0K apr 20 15:41 ..
drwxr-xr-x 2 marco marco 4,0K apr 20 17:20 config
drwxr-xr-x 2 marco marco 4,0K apr 20 15:48 migrations
drwxr-xr-x 2 marco marco 4,0K apr 20 15:48 models
-rw-r--r-- 1 marco marco  819 apr 20 08:53 pg.js
drwxr-xr-x 2 marco marco 4,0K apr 20 17:21 seeders

nano pg. js

const { Pool } = require('pg');
const { Sequelize } = require('sequelize');
const pool = new Pool();
const sequelize = new Sequelize('pusers', 'postgres', 'pwd', {
  host: 'localhost',
  dialect: 'postgres',
  pool: {
    max: 5,
    min: 0,
    acquire: 30000,
    idle: 10000
  }
});
sequelize
  .authenticate()
  .then(() => {
    console.log('Connection has been established successfully.');
  })
  .catch(err => {
    console.log('Unable to connect to the database:', err);
  });

module.exports = {
  query: (text, params, callback) => {
    return pool.query(text, params, callback);
  },
}

Заполняет образец базы данных строкой: 

pusers=# SELECT schemaname,relname,n_live_tup 
pusers-#   FROM pg_stat_user_tables 
pusers-#   ORDER BY n_live_tup DESC;
 schemaname |    relname    | n_live_tup 
------------+---------------+------------
 public     | pusers        |          1
 public     | SequelizeMeta |          1
(2 rows)

Я прочитал здесь: { ссылка }, что «в браузере нет простых TCP-сокетов, поэтому пытаюсь использовать net.Socket в браузере (через webpack, browserify»). , et c.) не сработает "

Environment Info:

  System:
    OS: Linux 5.3 Ubuntu 18.04.4 LTS (Bionic Beaver)
    CPU: (8) x64 Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz
  Binaries:
    Node: 12.15.0 - ~/.nvm/versions/node/v12.15.0/bin/node
    Yarn: 1.22.4 - ~/.nvm/versions/node/v12.15.0/bin/yarn
    npm: 6.14.4 - ~/.nvm/versions/node/v12.15.0/bin/npm
  Browsers:
    Chrome: 81.0.4044.92
    Firefox: 75.0
  npmGlobalPackages:
    @vue/cli: 4.2.3

Итак ... как решить проблему? Ждем вашей помощи. Marco

...