JAVASCRIPT

mongoose push items to array

people: {
         name: String, 
         friends: [{firstName: String, lastName: String}]
        }

db.people.update({name: "John"}, {$push: {friends: {firstName: "Harry", lastName: "Potter"}}});

add in to array mongoose

// With { $push: { field: element } }

// Example:
const elementToPush = { a: 1, b: 2 };
const body = { $push: { arrayField: elementToPush } };
model.patch(id, body);