How to write a string to the database in sequalize (nodejs) if it is not there?

Question

Node.js

I have an array of objects
Example.

const arr = [
  {...},
  {...},
  {...}
]

Each object has a field, for example a, which is designated as a unique column in the database.

Question. How can I write the data from that array to the database so as not to check each field for presence.

Now I am writing like this. But the downside is that if at least one object from the array is already in the database, an error occurs and the rest are not recorded

Transaction.bulkCreate(arr)

Answer 1

https://sequelize.org/master/class/lib/model.js~Mo...
3rd parameter
ignoreDuplicates, updateOnDuplicate