Mongoose add multiple object to array if not exist based

Question

How to add multiple objects to array based on key?

I need to add multiple objects in one query, check if each object key doesn't exist or duplicate, else add object. (label can be duplicate)

Schema

new Schema({
      additional: [
        {
          key: { type: String, required: true, unique: true },
          label: { type: String, required: true }
        }
      ]
})

request payload:

[ {key: "city", label: "CITY"}, {key: "gender", label: "GENDER"}
, {key: "city" ,label: "CITY1"}, {key: "city2", label: "CITY"}]

Expected results:

[
 {key: "city", label: "CITY"},
 {key: "gender", label: "GENDER"},
 {key: "city2", label: "CITY"}
]

I tried to find solutions but couldn't find any.

Answer 1

You can try using bulkWrite operation in mongodb

Suppose you have following payload to update

const payload = [
  { key: "city", label: "CITY" }, { key: "gender", label: "GENDER" },
  { key: "city", label: "CITY1" }, { key: "city2", label: "CITY" }
]

Query to update documents in bulk

Model.bulkWrite(
  payload.map((data) => 
    ({
      updateOne: {
        filter: { '_id': 'xxxx', 'additional.key' : { $ne: data.key } },
        update: { $push: { additional: data } }
      }
    })
  )
})

Which will send a request in bulk to update like this

bulkWrite([
  { updateOne: { filter: { '_id': 'xxxx', 'additional.key' : { $ne: data.key } }, update: { $push: { additional: data } } } },
  { updateOne: { filter: { '_id': 'xxxx', 'additional.key' : { $ne: data.key } }, update: { $push: { additional: data } } } }
])