DataLoader doesn't seem to be clearing cache about dataloader HOT 5 CLOSED

@lucasbento - can you possibly replace your Mongo instance with some sort of mock so you can present the issue? I can't reproduce it, and we have tests that cover the clear functions that continue to pass.

My best guess from the information you shared is that you're using userLoader.clear(id.toString()); while using userLoader.load(id); - if id is not already a string these will result in different keys, so clear() will be attempting to clear the wrong key.

I'm more confused by clearAll() not working. It's implementation simply only calls clear() on the underlying cache Map instance. If you're not providing a custom implementation of Map (check your polyfills?) then perhaps something else is wrong with your application?

from dataloader.

I'd take a guess that the issue you're seeing here is because you're sharing the dataloader instance between all your requests – instead, you should only use dataloader for a single requests' lifetime – otherwise you'll end up sharing data between requests.

The "workers", if running in a separate process, have a different instance of that dataloader.

That is, dataloader works entirely in memory: if you go to a different machine or different process, then you've a completely new dataloader instance. If your process restarts, same deal.

That is, dataloader really isn't much more than something like this:

function createFetcher(fn) {
  var cache = {}

  return {
    fetch: function fetch(id) {
      if (!cache[id]) {
        cache[id] = fn(id);
      }

      return cache[id];
    },
    clear: function clear(id) {
      delete cache[id];
    }
}

(Sure, it uses process.nextTick to do batching, but the code above is meant to represent and show how it is in-memory)

from dataloader.

Hi all any updates on this? I'm having similar issues

from dataloader.

See also #62

from dataloader.

@leebyron: I'm gonna try to check what you just said, @ThisIsMissEm also has a good point, thank you both for answering.

I'm focusing on other projects right now so I don't really have enough time to work on this issue, I'm gonna try the suggestions as soon as I can, I'll close this issue for now and open again if needed.

Thank you!

from dataloader.