I have the following schema (NestJS + Mongoose):
@Schema({ timestamps: true })
export class Listing {
@Prop({
type: [{
bidderId: { type: Types.ObjectId, required: true, select: false, ref: User.name, index: true },
amount: { type: Number, required: true },
date: { type: Date, required: true }
}],
select: false
})
bids!: Bid[]
}
so basically every listing document has an array of bids.
now I notice that automatically mongoDB (or mongoose) creates _id field for every bid item I put into the bids array.
My question is, If I have a bid’s _id, how can I query it’s item from the listing’s bids array? something like:
// Adding a new bid to the listing, and retrieving the updated listing
const listingWithAddedBid = await this.listingModel.findByIdAndUpdate(listingId, {
$push: {
bids: {
$each: [{
amount: bidInfo.amount,
bidderId: new Types.ObjectId(user.id),
date: new Date()
}],
$sort: { amount: -1 }
}
}
}, { new: true })
// Getting the new bid's _id from the array (it will be at index 0 because we sort buy amount)
const newBidId = listingWithAddedBid.bids[0]._id
// here how can I query the entire bid item from the array with 'newBidId'? this won't work
this.listingModel.findById(newBidId) // returns null
