Save Date.now() to timestamp column but get date/time field value out of range - postgresql

Question

My project (NestJS with TypeScript) is using TypeOrm on PostgreSQL database.
My table has a column (in migration file):
new TableColumn({
name: 'managed_at',
type: 'timestamp',
isNullable: true,
}),
Associated field in entity class:
#Column({ type: 'timestamp', nullable: true })
managedAt: Date | null;
I would like the column managed_at holds value of date and time.
If I save a data to the table with:
import { Repository } from 'typeorm';
...
// repo is the Repository of typeorm
repo.update(
{ managedAt: Date.now() }
);
I get error:
QueryFailedError: date/time field value out of range: "1651495656811"
How to solve this problem that using Date.now() and hold value of data and time?

Answer 1

import { Repository } from 'typeorm';
...
// repo is the Repository of typeorm
repo.update(
{ managedAt: new Date() }
);
Change Date.now() -> new Date().
You need to save Date type data to column in timestamp type.
Btw, you can add this in your entity class.
It will update column before update data.
#BeforeUpdate()
updateManagedAt(): void {
this.managedAt = new Date();
}

Answer 2

The static Date.now() method returns the number of milliseconds elapsed since January 1, 1970 00:00:00 UTC, as per documentation here Date.now().
Whereas valid input for the time stamp types consists of the concatenation of a date and a time, followed by an optional time zone (if you are using timestamptz type instead of timestamp type), followed by an optional AD or BC. (Alternatively, AD/BC can appear before the time zone, but this is not the preferred ordering.
You can read more about Date/Time types in pgSQL here.
In your case, you can do it like this
repo.update({ managedAt: (new Date()).toISOString() });
You'd use toISOString for sharing a date with another machine or process.