.find does not work

[sibelius]

my schema has a field of type Buffer subtype 4 (uuid), then I'm trying to use this package to find data based on uuid

import MUUID from 'uuid-mongodb';

const Data = new mongoose.Schema({
uuid: {
      type: Buffer,
      subtype: 4,
      default: () => uuidv4(),

      required: true,
      unique: true,
      index: true,
    },
})

const data = new Data({}).save();

const all = await Data.findOne({ uuid: MUUID.from(data.uuid.toString()})

all is returning an empty array

[cdimascio]

@sibelius
Coupe notes

• be sure wait for save to commit (use await) before fetching the record
• you need to create a model from the schema

assuming that is in place you can do the following:

    // create a v4 uuid and wrap it in an MUUID (this is a shortcut for convenience) 
    const uuid = MUUID.v4();

    // save record and wait for it to commit
    await new Data({ uuid }).save();

    // retrieve the record
    const result = await Data.findOne({ uuid });

    // output the result
    console.log(result);

[cdimascio]

full working source

const mongoose = require('mongoose');
const MUUID = require('uuid-mongodb');

// Setup and connect
mongoose.connect('mongodb://localhost/my_mongoose', {
  useNewUrlParser: true,
  useUnifiedTopology: true,
});

const db = mongoose.connection
  .on('error', () => console.error('connection error:'))
  .once('open', () => {});

async function main() {
  const dataSchema = new mongoose.Schema({
    uuid: {
      type: 'object',
      value: { type: 'Buffer' },
      default: () => MUUID.v4(),

      required: true,
      unique: true,
      index: true,
    },
  });
  const Data = mongoose.model('Data', dataSchema);

  try {
    // create a v4 uuid (this simply wraps the fantastic uuid library)
    const uuid = MUUID.v4();

    // save record and wait for it to commit
    await new Data({ uuid }).save();

    // retrieve the record
    const result = await Data.findOne({ uuid });

    // output the result
    console.log(result);
  } catch (e) {
    console.error(e);
  } finally {
    db.close()
  }
}

main();

[cdimascio]

@sibelius let me know if this helps. best!

[sibelius]

Find is working even with pure string , aggregates does not, you need to transform the data yourself

Tks

[cdimascio]

Can you send an example. I'll see if there is something that that can improve your case

[sibelius]

what worked for us, was this

uuid: new mongoose.Types.Buffer(value).toObject(0x04)

value as the uuid as a string