How to connect to SQL Server with Windows authentication from Node.JS using knex module

Question

I am trying to connect SQL Server using knex with Windows Authentication from my node.js application.

Config:

 {
  client: 'mssql',
  connection: {
    database: 'MyDBName',
    host: 'xx.xx.xx.xxx',
    server: 'MY-SERVER_NAME\\SQLEXPRESS',
    options: {
      encrypt: false,
      trustedConnection: true,
    },
  },
}

I didn't add username and password in the config as I have added trustedConnection: true for Windows Authentication .

But I am getting the following error:

Login failed for user ''.

Even if I add add username and password, I get the same error.

Any suggestion will be of great help. Thanks

Answer 1

knex uses mssql which in turn uses either tedious or msnodesqlv8 . tedious doesn't support Windows Authentication. The default is tedious . Trying to use tedious with Windows Authentication results in ... Login failed for user ''. . The full error message is :

(node:16568) UnhandledPromiseRejectionWarning: ConnectionError: Login failed for user ''.
    at Connection.<anonymous> (K:\testprojects\nodesql\node_modules\mssql\lib\tedious.js:244:17)
    at Object.onceWrapper (events.js:291:20)
    at Connection.emit (events.js:203:13)
    at Connection.processLogin7Response (K:\testprojects\nodesql\node_modules\mssql\node_modules\tedious\lib\connection.js:1397:14)
    at Connection.message (K:\testprojects\nodesql\node_modules\mssql\node_modules\tedious\lib\connection.js:1932:14)
    at Connection.dispatchEvent (K:\testprojects\nodesql\node_modules\mssql\node_modules\tedious\lib\connection.js:1084:36)
    at MessageIO.<anonymous> (K:\testprojects\nodesql\node_modules\mssql\node_modules\tedious\lib\connection.js:984:14)
    at MessageIO.emit (events.js:203:13)
    at Message.<anonymous> (K:\testprojects\nodesql\node_modules\mssql\node_modules\tedious\lib\message-io.js:32:14)
    at Message.emit (events.js:208:15)

Which clearly shows that the source is tedious .

To get this I used this snippet :

const sql = require("mssql");
const config  = {
  database: "Master",
  server: "myserver",
  options: {
    trustedConnection: true
  }
};


(async () => {
        await sql.connect(config)
        const result = await sql.query`select name from sys.databases`
        console.dir(result)
})()

The docs explain that you need to use const sql = require("mssql/msnodesqlv8"); to use msnodesqlv8 , eg :

const sql = require("mssql");
const config  = {
  database: "Master",
  server: "myserver",
  options: {
    trustedConnection: true
  }
};

After this change the query runs and produces a list of database names

Unfortunately, this won't help with knex , as it loads and uses tedious directly. Despite what the code comment says, msnodesqlv8 is actively maintained and had a release only 4 days ago.

Answer 2

I was able to connect using msnodeqlv8 by making a new dialect based on this example

I just added the msnodesqlv8 module and used the following code, hopefully it helps someone out:

require('mssql/msnodesqlv8');
let Knex = require("knex");

let Dialect = require(`knex/lib/dialects/mssql/index.js`);
Dialect.prototype._driver = () => require('mssql/msnodesqlv8');

let sql = Knex({
  client: Dialect,
  connection: {
    server: "<sql server>",
    port: 1433,
    database: "<database name>",
    driver: "msnodesqlv8",
    options: {
        trustedConnection: true
      }
  }
});

Thanks