Mongoose async/await with Koa get stuck on await Model.findOne().exec()

Question

I have an Koa 2 application, and a post to /signup is handled by this function:

import User from 'models/user';

export const signup = async (ctx, next) => {
  const { email, password } = ctx.request.body;
  try {
    const existingUser = await User.findOne({ email });

    if (existingUser) {
      ctx.body = { error: 'Email is in use' };
      return next();
    }

    const user = new User({
      email,
      password,
    });
    await user.save();
    ctx.body = { success: true };
  } catch (e) {
    next(e);
  }
  return next();
};

The funtion receives correct data but the await User.findOne().exec(); never returns and gets stuck.

I think the problem is there because if I remove, code is executed normally. If I switch to Promise like... find().then It works too. async/await is working either, because If I change to a await fetch() (to emulate async) it works... but here is my babel config

{
  "presets" : ["latest", "stage-0"],
  "plugins": [
    ["module-resolver", {
      "root": ["./src"]
    }]
  ]
}

mongoose is version 4.7.0

Your code doesn't show you using `.exec()` (although it's probably not strictly necessary to use it). Also, are you sure that it doesn't throw an exception? Your code calls `next` twice when an exception occurs (once with the error argument, and then with `return next`). — robertklep, Nov 27 '16 at 18:09
ah sorry .. copied an old code.. but doesn't work either... and no exceptions... and already fixed the two calls... thanks — Lucas Katayama, Nov 27 '16 at 18:11

score 0 · Answer 1 · answered May 04 '17 at 09:57

0

I wrote very similar app, but all worked fine. What type of promises you use? I mean you use native JS promisese or Mongoose promises? With mongoose promises I had problems so I change it for native JS:

const mongoose = require('mongoose');

mongoose.Promise = Promise; // Use native Promises

mongoose.connect(config.get('mongoose.uri'), config.get('mongoose.options'));
...
module.exports = mongoose;

answered May 04 '17 at 09:57

Sergaros

821
1
5
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you should not ask for clarifications in your answer, comments are for clarifications if any are needed – Pawel Gradecki May 04 '17 at 10:27
I started another app these days... and it is working now... Don't know what happened .. CLosing – Lucas Katayama May 11 '17 at 11:51

score 0 · Accepted Answer · answered May 11 '17 at 11:53

0

I started another application and t is working now. Don't know what happened. Maybe new version fixed.

answered May 11 '17 at 11:53

Lucas Katayama

4,445
27
34

Mongoose async/await with Koa get stuck on await Model.findOne().exec()

2 Answers2