Javascript calling API with Promise returns undefined values

Question

im trying to get the value of the promise but it says it is undefined everytime. Im new to JS so sorry for being so bad...

For the function being called i didnt put the whole code into the post just the necessary information that it is return 4 floats. I tested that function.

I UPDATED THE CODE:

async function getClosestSchachtInSeg(
  LON,
  LAT,
  FROMANGLE,
  TOANGLE,
  NS,
  maxCount
) {
  sqlQuery =
    "SELECT *, ST_X(ST_Transform (geom, 4326)) AS LON, ST_Y(ST_Transform (geom, 4326)) AS LAT," +
    " ST_Transform(SCHAECHTE_OWN.geom, 4326) <-> ST_SetSRID(ST_MakePoint(" +
    LON +
    ", " +
    LAT +
    "), 4326)::geometry AS dist " +
    ' FROM public."SCHAECHTE_OWN" SCHAECHTE_OWN ' +
    " WHERE atan((ST_X(ST_Transform (geom, 4326)) - " +
    LON +
    ") /  (ST_Y(ST_Transform (geom, 4326)) - " +
    LAT +
    ")) > " +
    FROMANGLE +
    "*pi()/180" +
    " AND atan((ST_X(ST_Transform (geom, 4326)) - " +
    LON +
    ") /  (ST_Y(ST_Transform (geom, 4326)) - " +
    LAT +
    ")) < " +
    TOANGLE +
    "*pi()/180" +
    " AND ST_Y(ST_Transform (geom, 4326)) " +
    NS +
    " " +
    LAT +
    " ORDER BY dist LIMIT " +
    maxCount +
    ";";

  pool
    .query(sqlQuery)
    .then((results) => {
      if (results.rows.length > 0) {
        for (i = 0; i < results.rows.length; i++) {
          var ResLon = results.rows[i].lon;
          var ResLat = results.rows[i].lat;
          var ResDist = results.rows[i].dist;

          var urlDistance =
            "http://gisdatavm01hw.versatel.local:5001/getShortestPathLonLatDistance/" +
            Math.round(LON * 1000000) / 1000000 +
            "/" +
            Math.round(LAT * 1000000) / 1000000 +
            "/" +
            Math.round(results.rows[i].lon * 1000000) / 1000000 +
            "/" +
            Math.round(results.rows[i].lat * 1000000) / 1000000;

          //console.log(urlDistance);

          fetch(urlDistance)
            .then((response) => response.text())
            .then((body) => {
              //console.log(body);
              Dist = JSON.parse(body)["distance"];
              if (Dist) {
                return 10;
              }
            });
        }
      }
    })
    .catch((err) => console.error("Error executing query", err.stack));
}

async function getClosestSchachtOWNJson12SegNew(request, response) {
  response.setHeader("Access-Control-Allow-Origin", "*");
  response.setHeader("Access-Control-Allow-Credentials", "true");
  response.setHeader(
    "Access-Control-Allow-Methods",
    "GET,HEAD,OPTIONS,POST,PUT"
  );
  response.setHeader(
    "Access-Control-Allow-Headers",
    "Access-Control-Allow-Headers, Origin,Accept, X-Requested-With, Content-Type, Access-Control-Request-Method, Access-Control-Request-Headers"
  );
  //response.setHeader("Content-Type", "application/json");

  const LON = request.params.LON;
  const LAT = request.params.LAT;
  const maxCount = request.params.maxCount;

  Promise.resolve([
    getClosestSchachtInSeg(LON, LAT, -90, -60, ">=", maxCount),
    getClosestSchachtInSeg(LON, LAT, -60, -30, ">=", maxCount),
    getClosestSchachtInSeg(LON, LAT, -30, 0, ">=", maxCount),
    getClosestSchachtInSeg(LON, LAT, 0, 30, ">=", maxCount),
    getClosestSchachtInSeg(LON, LAT, 30, 60, ">=", maxCount),
    getClosestSchachtInSeg(LON, LAT, 60, 90, ">=", maxCount),
    getClosestSchachtInSeg(LON, LAT, -90, -60, "<", maxCount),
    getClosestSchachtInSeg(LON, LAT, -60, -30, "<", maxCount),
    getClosestSchachtInSeg(LON, LAT, -30, 0, "<", maxCount),
    getClosestSchachtInSeg(LON, LAT, 0, 30, "<", maxCount),
    getClosestSchachtInSeg(LON, LAT, 30, 60, "<", maxCount),
    getClosestSchachtInSeg(LON, LAT, 60, 90, "<", maxCount),
  ]).then((values) => {
    console.log(values);
  });
}

Output is:

[
  Promise { undefined },
  Promise { undefined },
  Promise { undefined },
  Promise { undefined },
  Promise { undefined },
  Promise { undefined },
  Promise { undefined },
  Promise { undefined },
  Promise { undefined },
  Promise { undefined },
  Promise { undefined },
  Promise { undefined }
]

Answer 1

You're forgetting an await on the call to the async function getClosestSchachtInSeg.

Change:

const promise1 = new Promise((resolve, reject) => {

  resolve(getClosestSchachtInSeg(LON,LAT,-90,-60,">=",maxCount));

});

promise1.then(result => {

  console.log(result);

  console.log(promise1);

  return result;

})

to:

const result = await getClosestSchachtInSeg(LON, LAT, -90, -60, ">=", maxCount);
console.log(result);

// do what ya gotta do

Also, make getClosestSchachtOWNJson12SegNew an async function (so the await s above work — you can't use await in a non- async function).