Mongoose Populate Array of ObjectIDs that utilizes refPath returns empty array

Question

issue.js

const mongoose;
const schema = new mongoose.Schema({
    docs: {
        type: [mongoose.Schema.Types.ObjectId],
        refPath: 'coll',
        required: true
    },
    coll: {
        type: String,
        required: true,
        enum: ['Product', 'Service']
    }
});

module.exports = mongoose.model('Issue', schema);

partial index.js

try{
    let issues = await Issue.find().populate('docs');

    console.log(issues);
    //every issue in issues, has an empty 'docs' array, when it should consist of products/services that exist

}catch(e){}

Not sure why arrays is making it not work, I tried making the docs field as singular ObjectId, and it worked fine. Only thing I could think of is that because it's an array, the refPath has to be different, but I'm not sure what I could add, as I tried using 'this.coll'.

Shihab · Accepted Answer · 2019-12-03 12:15:02Z

1

I see an error in your schema. Not sure if that is the issue, but you can try.

const mongoose;
const schema = new mongoose.Schema({
    docs: [{
        type: mongoose.Schema.Types.ObjectId, // <-- This line
        refPath: 'coll',
        required: true
    }],
    coll: {
        type: String,
        required: true,
        enum: ['Product', 'Service']
    }
});

edited Dec 3, 2019 at 12:15

answered Dec 3, 2019 at 11:37

Shihab

2,6793 gold badges23 silver badges30 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Darren A. Over a year ago

That was to make it an array of ObjectIds, not a single 1. Oh but that helped me debug it! I had to do the Square Brackets around the whole docs object, not just the type! Thanks! :)

Shihab Over a year ago

@DarrenA. Yeah. Updated my answer to support array.

Collectives™ on Stack Overflow

Mongoose Populate Array of ObjectIDs that utilizes refPath returns empty array

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related