Impossible to connect to postgres with typescript-CodePudding

I'm trying to connect into a postgresSQL database in typescript and to be faire, it doesn't work and it's not explicite why.

I do not have any error log output and so after trying to use manually some console.log to debug.

I found that the method connect seem to timeout or fail I don't know since I do not have any logs or other information.

This is what I've done:

import { Client } from 'pg';
import { env } from "./integration.env";
import fs from 'fs';

async function resetDatabase(): Promise<void> {
    const client = new Client(env.database);
    console.log("before connect"); // only output That I got
    await client.connect();
    console.log("after connect"); // not displayed :( 
    const res = await client.query(fs.readFileSync("./seed.sql"), ['Connection to postgres successful!']);
    console.log("connected", res.rows[0].connected); // not displayed :(
    await client.end();
}

resetDatabase().then((a) => console.log("ok", a)).catch(a => console.log("no", a)); // thoses logs are not displayed :(

I run this code with the command npx ts-node test and the only output I get is before connect

It doesn't even display the ok or the no at the end of the promise and so I really don't know where is the problem. If the problem is the data send to the constructor to create the client, I guess the connection method will just fail with a specific error no ?

Thanks a lot for your help.

CodePudding user response：

I may not be connecting for reasons like the host isn't found but you wouldn't see that because you didn't define a timeout.

In the documentation, the option connectionTimeoutMillis of the Client constructor defines the timeout. Its default value is basically infinity.

Add this attribute to your env.database or do something like { ...env.database, connectionTimeoutMillis: 3000 } for a timeout of 3 seconds.

If you are using a connection string, you need to do something like this instead:

new Client({
  connectionString: env.database,
  connectionTimeoutMillis: 3000,
})

More information: https://node-postgres.com/api/client

CodePudding user response：

I was trying to do this with an old version of pg, I updated pg to the version 8.7.3 and now it works well.

by the way I also added some try catch block because If something fail after the connection it doesn't go to the client.end();

import { Client } from 'pg';
import { env } from "./integration.env";
import fs from 'fs';

async function resetDatabase(): Promise<void> {
    const client = new Client(env.database);
    try {
        console.log("before connect");
        await client.connect();
        console.log("after connect");
        const res = await client.query(fs.readFileSync("./seed.sql"), ['Connection to postgres successful!']);
        console.log("connected", res.rows[0].connected);
    } catch(err) {
        console.error(err);
    }
    await client.end();
}

resetDatabase().then((a) => console.log("ok", a)).catch(a => console.log("no", a));