Sequelize: isNewRecord is always false - node.js

Question

I have a Sequelize model called Test with a unique field value (primary key). I'm using SQLite as the database management system.
If I use the bulkCreate() option ignoreDuplicates: true, then bulkCreate will ignore the new data if they already exist in the database. That works great, but the objects returned by bulkCreate() always have isNewRecord: false, even when a new record was inserted into the database.
Code
const items = [ {value: 'a'}, {value: 'b'} ]; // Items to be saved in database.
const results = await Test.bulkCreate(items, {
ignoreDuplicates: true // Ignore duplicate records
});
After the first execution of bulkCreate() and the database empty, the value of results:
[
Test {
dataValues: {
value: 'a',
createdAt: 2020-07-12T12:01:08.695Z,
updatedAt: 2020-07-12T12:01:08.695Z
},
_previousDataValues: {
value: 'a',
createdAt: 2020-07-12T12:01:08.695Z,
updatedAt: 2020-07-12T12:01:08.695Z
},
_changed: Set {},
_options: {
isNewRecord: true,
_schema: null,
_schemaDelimiter: '',
include: undefined
},
isNewRecord: false
},
Test {
dataValues: {
value: 'b',
createdAt: 2020-07-12T12:01:08.695Z,
updatedAt: 2020-07-12T12:01:08.695Z
},
_previousDataValues: {
value: 'b',
createdAt: 2020-07-12T12:01:08.695Z,
updatedAt: 2020-07-12T12:01:08.695Z
},
_changed: Set {},
_options: {
isNewRecord: true,
_schema: null,
_schemaDelimiter: '',
include: undefined
},
isNewRecord: false
}
]
I expected isNewRecord: true after the first execution. What am I missing?
Environment
Windows 10 Pro
NodeJS v12.16.2
sequelize: 6.3.3
sqlite3: 5.0.0
Sequelize docs
isNewRecord of Model:
ignoreDuplicates of bulkCreate():

Answer 1

You need to access _options.isNewRecord.
As this issue states that the isNewRecord only be set to true if the instance has not yet been persisted to the database.
In your case, because you have saved the instance (the first time or second time, it doesn't matter, you already save it) so isNewRecord is set to false.
So as I mention above, if you want to check if your instance is just saved the first time or not, access _options.isNewRecord.

Answer 2

The isNewRecord field is true if the Model instance does not exist in the database.
const user = new User({ ...userData });
console.log(user.isNewRecord); // true
await user.save();
console.log(user.isNewRecord); // false