Mongoose: Repeated object in schema

Question

I'm defining my schema in mongoose and I have an array of book objects, and then an "active book". Now setting it up wasn't an issue, but this seems like unnecessary repetition to define the exact same book object in two different parts of the schema.

 var BookSchema   = new Schema({
    activeBook: {
        id: String,
        title: String,
        author: String,
        pages: Number
    },
    books: [{
        id: String,
        title: String,
        author: String,
        pages: Number
    }]
});

Is there a cleaner way of writing this so I don't have to write out the same object everywhere I use it?

chridam · Accepted Answer · 2015-07-21 09:13:56Z

1

A cleaner way would be to create a subdocument, a document with a schema of its own which are elements of a parent's document array. So in your example above you can define the child/parent schema as follows:

var ChildSchema = new Schema({
    id: String,
    title: String,
    author: String,
    pages: Number
});

var ParentSchema = new Schema({
    activeBook: ChildSchema,
    books: [ChildSchema]
});

answered Jul 21, 2015 at 9:13

chridam

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