Additional field in array of _id's referencing another collection - mongodb

Question

this is what I have and it works:
var comboSchema = new Schema({
components: [{
type: Schema.Types.ObjectId,
ref: "Component"
}]
})
This is what I want to achieve:
var comboSchema = new Schema({
components: [{
type: Schema.Types.ObjectId,
ref: "Component",
amount: {type: Integer}
}]
})
Is it possible in MongoDB, if not what is the best workaround?
Thank you :-)

Answer 1

This schema work because of an element or filed name is provided
var comboSchema = new Schema({
components: [{
type: Schema.Types.ObjectId,
ref: "Component"
}]
})
Now you made a single mistak you want to create schema name without name in object with two different filed
Right way to create schema like this is to make other variable inside of array which contain type of filed
var comboSchema = new Schema({
components: [{
id: {
type: Schema.Types.ObjectId,
ref: "Component"
},
amount: { //If you want to make every component amount
type: Number
}
}]
})
Or
var comboSchema = new Schema({
amount: { type: Number },
//If you want to make only single amount on multiple components
components: [{
componentId: {
type: Schema.Types.ObjectId,
ref: "Component"
}
}]
})
But in both case you can't populate directly. You need to use aggregation for that to get data for embedded documents.