save unique json key value pair in mongoose schema - node.js

Question

the question is to save unique value generated from multiple sources into one Schema. This schema is a placeholder for all individual data and there should not be any repeat.
(function() {
ContactUniqueMarketingSchema = module.exports = mongoose.Schema({
contacts: [{
displayName: { type: String },
emails: [Object],
familyName: { type: String },
firstName: { type: String },
id: { type: String },
middleName: { type: String },
phoneNumbers: [Object],
rawId: { type: String },
location: {
type: Object,
properties: {
type: {
type: String,
enum: ['Point', 'LineString', 'Polygon'],
default: 'Point'
},
coordinates: {
type: [Number],
default: [0, 0]
}
}
},
created_at: { type: Date, default: Date.now },
}],
created_at: { type: Date, default: Date.now },
updated_at: { type: Date, default: Date.now }
});
ContactUniqueMarketingModel = module.exports = mongoose.model("ContactUniqueMarketingModel", ContactUniqueMarketingSchema);
})()
below is the code as how I am saving it. however I do try to filter the data beforehand but in few edge cases duplicates values do come in. the filter function only filter from the JSON object. however there is no way of knowing from Schema
(function() {
function transformContact(contacts) {
var transformedContact = [];
if (contact) {
contact.forEach(function(tupleContact, index) {
});
}
};
function getUniqueContact(contacts) {
log('Get Unique Contact Value :');
var UniqueContacts = [];
var contactMap = new Map();
contacts.forEach(row => {
if (!contactMap.has(row.phoneNumbers[0].value.toString())) contactMap.set(row.phoneNumbers[0].value.toString(), row);
});
for (var value of contactMap.values()) {
UniqueContacts.push(value);
};
return UniqueContacts;
}
DeviceInformationSchema.pre('findOneAndUpdate', function(next) {
log('DeviceInformationSchema findOneAndUpdate Hook :');
var device = this;
var contactToSave = [];
device.contacts = getUniqueContact(device.contacts);
contactToSave.push(device.contacts);
var contactSaveTuple = new ContactUniqueMarketingModel(contactToSave);
contactSaveTuple.save(function(errSave, saved) {
if (errSave) {
log('Error Occured Saving New Data :');
}
log('Successfully Added Data To ContactUniqueMarketingModel Via Save');
next();
});
});
DeviceInformationSchema.pre('save', function(next) {
log('DeviceInformationSchema Save Hook :');
var device = this;
var contactToSave = [];
device.contacts = getUniqueContact(device.contacts);
contactToSave.push(device.contacts);
var contactSaveTuple = new ContactUniqueMarketingModel(contactToSave);
contactSaveTuple.save(function(errSave, saved) {
if (errSave) {
log('Error Occured Saving New Data :');
}
log('Successfully Added Data To ContactUniqueMarketingModel Via Save');
next();
});
});
DeviceInformationSchema.pre('update', function(next) {
log('DeviceInformationSchema update Hook :');
var device = this;
var contactToSave = [];
device.contacts = getUniqueContact(device.contacts);
contactToSave.push(device.contacts);
var contactSaveTuple = new ContactUniqueMarketingModel(contactToSave);
contactSaveTuple.save(function(errSave, saved) {
if (errSave) {
log('Error Occured Saving New Data :');
}
log('Successfully Added Data To ContactUniqueMarketingModel Via Update');
next();
});
});
// });
})()
Above schema, values are inserted into the common Schema which contains only contacts. The save mechanism is performed from hooks from another Schema
Please suggest