Pasre server on AWS EC2 giving 141 error on cloud code

Question

I am now using the below cloud code to only update "downloads" column on my parse server running on AWS EC2 instance. But I am getting the error code 141(invalid function)

Parse.Cloud.define("updateDownloads", async (request) => {
    const query = new Parse.Query(request.params.className);
    query.get(request.params.objectId)
    .then((watchFace) => {
        downloads = watchFace.get("downloads")
        watchFace.set("downloads", downloads + 1);
        await watchFace.save(null, { useMasterKey: true });
        return "download updated";
    }, (error) => {
      return "something went wrong";
    });
  });

I have place my code in /opt/bitnami/cloud/main.js. I even tried adding “cloud”: “/opt/bitnami/cloud/main.js” in config.json file but then the parse server gives 503 Service Unavailable error. So I removed it.

Answer 1

If you don't add the cloud code main.js file to your parse server configuration, parse server will never find your function, and that's why you get the invalid function error.

If you get error when adding the file, you are either adding it in a wrong way (you need to check your parse server initialization code) or the config.json is in wrong format or the cloud code has a problem.

The best way to figure it out is by checking your logs.

At a first glance, a problem that I see (may have others) is the usage of await in a function that is not async. You are also using a combination of async and then, which is little strange.

I'd recommend you to change the code to something like:

Parse.Cloud.define("updateDownloads", async (request) => {
    const query = new Parse.Query(request.params.className);
    const watchFace  = await query.get(request.params.objectId);
    const downloads = watchFace.get("downloads");
    watchFace.set("downloads", downloads + 1); // You can use inc function to avoid concurrency problem
    await watchFace.save(null, { useMasterKey: true });
    return "download updated";    
  });