doc.fetch did not execute callback

[monsterooo]

sharedb is a very great library, but I encountered some problems in using it. The code is in the ubuntu system

When using docIns.fetch, the callback is not executed.

My test code is as follows

import ShareDB from "sharedb";
import ShareDBPostgresql from "sharedb-postgres";
import otText from "ot-text";

const connectURL =
  "postgresql://johndoe:randompassword@localhost:5432/test-dev?schema=public";
ShareDB.types.map["json0"].registerSubtype(otText.type);
const shareDBPostgresql = ShareDBPostgresql({
  connectionString: connectURL,
});
const backend = new ShareDB({ db: shareDBPostgresql });
const connection = backend.connect();
const docIns = connection.get("sandbox", "test-doc");
console.log("started:");

async function run() {
  return new Promise((resolve, reject) => {
    try {
      docIns.fetch(function (err) {
        console.log("callback executed：", err);
        if (err) throw reject(err);
        if (docIns.type === null) {
          docIns.create({ content: { a: "abc" } });
          resolve(undefined);
        }
      });
    } catch (error) {
      console.log('error:',error)
    }
  });
}

run();

process.stdin.resume();

Executing the code, the output I get in the console is:

root@createthink:~# npx ts-node test.js
started:

The strangest thing is that this code is executed on the local mac computer and everything is normal
Mac execution output is as follows：

started:
callback execute： undefined

In addition, I just tested the windows system, it is the same problem

Excuse me, am I missing something? Thanks

[monsterooo]

After several hours of debugging, I finally found the problem
The reason is：sharedb-postgres Depends on the 7.x version of the pg library. But the 7.x pg library does not support Node.js 14 version.

So I cloned sharedb-postgres and re-modified the pg dependency to 8.x

problem solved

Hope it will be helpful to those who follow :)