Nested object schema in mongoose

Question

Let's suppose I have a schema like this

var Language = new Schema({
    name: { type: String, unique: true, required: true },
    pos: [{
        name: String,
        attributes: [{
            name: String
        }]
    }]
});

Will each item in pos, and in attributes, have an _id? If I add a unique index to the name field in the pos array, will uniqueness be enforced to just that array, or will it be unique for all entries?

score 3 · Accepted Answer · edited May 23 '17 at 10:30

3

No, embedded documents like pos and attributes that don't have their own schema do not have an _id property.

If you add a unique index to the name field in the pos array, uniqueness will be enforced across the collection, but not within the array of a single document. See this post.

edited May 23 '17 at 10:30

Community

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answered Aug 12 '12 at 04:14

JohnnyHK

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This is not correct as of Mongoose 4, where `pos` and `attributes` will get their own schema. – Adam Lockhart Apr 22 '16 at 13:25

score 1 · Answer 2 · answered Apr 22 '16 at 13:26

1

In Mongoose 4, pos and attributes will get their own schema. You can prevent them from getting _id attributes like so:

// ...
    attributes: [{
        name: String,
        _id: false
    }]
// ...

answered Apr 22 '16 at 13:26

Adam Lockhart

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Nested object schema in mongoose

2 Answers2