Array default bug

[SteveCruise]

bug

What is the current behavior?

I set like this.

permissions: {
        type: [[Number]],
        default: [[0, 1]]
    },

But the result default is this:

permissions: [ [ 0 ], [ 1 ] ],

I want this:

permissions: [ [ 0, 1 ] ],

node.js mongoose and MongoDB is the latest version.

[vkarpov15]

Thanks for reporting, will investigate ASAP

[sobafuchs]

yup this looks like a bug:

const mongoose = require('mongoose');
const co = require('co');
mongoose.Promise = global.Promise;
const GITHUB_ISSUE = `gh-5780`;


exec()
  .then(() => {
    console.log('successfully ran program');
    process.exit(0);
  })
  .catch(error => {
    console.error(`Error: ${error}\n${error.stack}`);
  });


function exec() {
  return co(function* () {
    yield mongoose.connect(`mongodb://localhost:27017/${GITHUB_ISSUE}`, { useMongoClient: true })
    const schema = new mongoose.Schema({
      permissions: {
        type: [[Number]],
        default: [[0, 1]]
      },
    });

    const Model = mongoose.model('Model', schema);

    console.log(new Model({ }));
  });
}

the log output:

{ _id: 59fbded47a74f264def9f1a6, permissions: [ [ 0 ], [ 1 ] ] }

[vkarpov15]

As a workaround do this:

    const schema = new mongoose.Schema({
      permissions: {
        type: [[Number]],
        default: () => [[0, 1]]
      },
    });

Something is wrong with the way nested array defaults get casted, but using a function rather than an array as the default seems to avoid this issue. We'll fix this issue ASAP but till then just use the workaround 👍

[SteveCruise]

@vkarpov15 Thank you very much！！！ Great！！！