所以，假設我有這段完美運行的代碼。const {  Database} = require("arangojs");var db = new Database({  url: "http://localhost:8529"});const database_name = "cool_database";db.useBasicAuth("username", "password123");db.listDatabases()  .then(names => {    if (names.indexOf(database_name) > -1) {      db.useDatabase(database_name);      db.get();    } else {      db.createDatabase(database_name)        .then(() => {          db.useDatabase(database_name);          db.collection("my-collection").create();        });    }  });const collection = db.collection("my-collection");const getJobFromQueue = () => {  return db.query({      query: "FOR el IN @@collection FILTER DATE_TIMESTAMP(el.email.sendAfter) < DATE_NOW() AND el.status != 'processed' AND el.status != 'failed' SORT el.email.sendAfter LIMIT 1 RETURN el",      bindVars: {        "@collection": "my-collection"      }    })    .then(cursor => cursor.all());}但是我想將最上面的代碼移到另一個文件中，只需要 db 和 collection，我該怎么做呢？一直在努力讓它工作太久了。const {  db,  collection} = require("./db");const getJobFromQueue = () => {  return db.query({      query: "FOR el IN @@collection FILTER DATE_TIMESTAMP(el.email.sendAfter) < DATE_NOW() AND el.status != 'processed' AND el.status != 'failed' SORT el.email.sendAfter LIMIT 1 RETURN el",      bindVars: {        "@collection": "my-collection"      }    })    .then(cursor => cursor.all());}