Implicit calls under the hood, not sure where UnhandledPromiseRejectionWarning

[pthieu]

I'm getting this unhandled error:

(node:89515) UnhandledPromiseRejectionWarning: Error: [deleted]
    at RedditUser.get _uri [as _uri] (/Users/pthieu/www/asb-scraper-service/node_modules/snoowrap/dist/objects/RedditUser.js:31:13)
    at RedditUser.fetch (/Users/pthieu/www/asb-scraper-service/node_modules/snoowrap/dist/objects/RedditContent.js:85:67)
    at Object.get (/Users/pthieu/www/asb-scraper-service/node_modules/snoowrap/dist/objects/RedditContent.js:52:113)
    at Proxy.toString (<anonymous>)
    at objectToString (/Users/pthieu/www/asb-scraper-service/node_modules/objection/lib/utils/clone.js:1767:33)
    at baseGetTag (/Users/pthieu/www/asb-scraper-service/node_modules/objection/lib/utils/clone.js:1177:9)
...

I'm actually not sure where this is coming from as all I'm doing are r.getSubmission's and submission.fetch().comments's

I've put try-catch blocks on any snoowrap call so I'm thinking there must be something happening like a heartbeat or something under the hood.

This error also makes me think something is happening under the hood as I'm only making 5 api calls every 30 seconds, which comes out to be 10 a minute, 100 per 10 minutes which is under reddit's API limits.

Unhandled rejection Error: snoowrap refused to continue because reddit's ratelimit was exceeded. For more information about reddit's ratelimit, please consult reddit's API rules at https://github.com/reddit/reddit/wiki/API.
    at snoowrap._awaitRatelimit (/Users/pthieu/www/asb-scraper-service/node_modules/snoowrap/dist/request_handler.js:155:11)
    at /Users/pthieu/www/asb-scraper-service/node_modules/snoowrap/dist/request_handler.js:81:18
    at runCallback (timers.js:696:18)

[not-an-aardvark]

Hi,

Could you share the code that you're using? It's hard to tell what's going on without any code. My best guess is that you are trying to get information about a user whose account has been deleted.

[pthieu]

my core code is something like this:

const Snoowrap = require('snoowrap');

const config = require('./config')

const redditOpts = {
  userAgent: config.REDDIT_USER_AGENT,
  clientId: config.REDDIT_CLIENT_ID,
  clientSecret: config.REDDIT_CLIENT_SECRET,
  refreshToken: config.REDDIT_REFRESH_TOKEN,
};

const r = new Snoowrap(redditOpts);


async const main() {
  const results = [];
  const comments = [];

  const redditId = post.reddit_id;
  const submission = await r.getSubmission(redditId);

  results.push(submission)
  const commentsData = await submission.fetch().comments
  const comments = comments.concat(...commentsData);
}

I think submission.fetch() might be fetching everything that's in the Submission Listing? including user.

Anyway, I swapped all these calls with the browser .json requests since they're all GET requests and the rate-limit errors went away

[ZeroTricks]

These errors seem to happen when the author of a submission is deleted. This is not immediately clear as the error being thrown is just that, the invalid username '[deleted]'.

r.getSubmission('9ka5gm').author.fetch().then(console.log); // unhandled rejection (Error: [deleted])
r.getSubmission('9ka5gm').author.then(console.log); // RedditUser { name: '[deleted]' } (no error, no unhandled rejection)
r.getSubmission('9ka5gm').author.then(a => console.log(a.name)); //[deleted] (no error, no unhandled rejection)
r.getSubmission('9ka5gm').author.then(a => console.log(a.is_suspended)); // unhandled rejection (Error: [deleted])
r.getUser('[deleted]').fetch().then(console.log); // (Error: [deleted]) (thrown error, instead of unhandled rejection)
r.getUser('deleted').fetch().then(console.log); // RedditUser { is_suspended: true, name: 'deleted' } (real user, no error)

Putting the right .catch() 'es in the examples above is easy but i needed a workaround for some business logic i couldn't change, so i ended up with something like:

if(post.author.name == '[deleted]'){
  console.log('Avoiding snoowrap failures by changing crossposted author [deleted] to deleted');
  post.author.name = 'deleted';
}
business logic doing stuff with post;

Authors can also be in embedded crossposts, so also check

if(post.crosspost_parent_list && post.crosspost_parent_list[0].author.name == '[deleted]'){
  console.log('Avoiding snoowrap failures by changing crossposted author [deleted] to deleted');
  post.crosspost_parent_list[0].author.name = 'deleted';
}

Not sure if there's more places where there can be a [deleted] author.

[Venefilyn]

I've not been able to reproduce this as I can't figure out how this could occur in the code-snippet