How to write update query in mongodb for deeply nested array? - node.js

Question

Hi I have a Model Customer and its schema
var customerSchema = new Schema({
name: {type: String, required:true, trim: true, index: true, default: null, sparse: true},
cardInfo: { type: [cardInfoSchema]}
})
var cardInfoSchema = new Schema({
customerId : { type: String, required: true, index: true, unique: true,trim : true, sparse: true},
cards: { type:[cardsSchema], default:[]}
}, {_id: false});
var cardsSchema = new Schema({
cardType : { type: String, required: true, default: null, trim : true },
isActive : { type: String, required: true, trim: true }, //0: not active, 1: active
cardId : { type: String, required: true, trim: true },
createdAt : { type: Date, default: Date.now, required: true }
})
I want to add multiple cards of customer so I am using this
var dataToSet = {
'cardInfo.customerId': '25934285649875',
$push: {
'cardInfo.cards': {
cardId: 'somecardid,
cardType: 'type',
createdAt: new Date().toISOString(),
isActive: true
}
}
};
But I am getting this error.
cannot use the part (cardInfo of cardInfo.customerId) to traverse the element ({cardInfo: []})
Please help me in writing the query to add card of customer using mongodb or mongoose.

Answer 1

Try the positional $ operator in your update which acts as a placeholder for the first element that matches the query document, and when you use it make sure the cards array field must appear as part of the query document. In your case you'd want to add a card document into the 'cards' array, but only if the cardId doesn't exist:
var query = {
"cardInfo.cards.cardId": { "$nin": ["somecardid"] }
};
var update = {
"$push": {
"cardInfo": { "customerId": "25934285649875" },
"cardInfo.$.cards": {
cardId: "somecardid",
cardType: "type",
createdAt: new Date().toISOString(),
isActive: true
}
}
};
Customer.update(query, update, function (err, result) { ... });