Timestamp

[cnkdynamics]

Can I get the timestamp from the generated id?

[ericelliott]

Yes, but I don't recommend it. You should create a separate timestamp instead.

See https://github.com/ericelliott/cuid#broken-down

and from the same README...

"The cuid specification should not be considered an API contract. Code that relies on the groupings as laid out here should be considered brittle and not be used in production."

[cnkdynamics]

Thanks.

On Fri, Oct 10, 2014 at 9:00 PM, Eric Elliott notifications@github.com
wrote:

Yes, but I don't recommend it. You should create a separate timestamp
instead.

See https://github.com/ericelliott/cuid#broken-down

and from the same README...

"The cuid specification should not be considered an API contract. Code
that relies on the groupings as laid out here should be considered brittle
and not be used in production."

—
Reply to this email directly or view it on GitHub
#13 (comment).

Felipe Lorenzo VI

[Cicko]

@ericelliott How can I find the algorithm to get the date from the cuid?

From what I see from the README it says that the first 8 characters after the letter 'c' is the timestamp, but how can I convert it to an actual date?

And why you don't recommend it?

Thanks in advance

[ericelliott]

As explained above, and in the documentation, you don't. If you need to know the time something was created, record a separate timestamp. Ids should only be used as ids, and the cuid spec was not designed for data extraction. Groupings do not have guaranteed lengths.

[ericelliott]

The security risk associated with extracting metadata from ids is the reason CUID is deprecated and we now prefer CUID2.

[Cicko]

@ericelliott Thank you for your answer.

I asked because in our project we just added a field createdAt in our PostgresSQL recently and we set a default value of '1999-12-31 23:59:59.000' so all older tuples in the DB have this value which is unrealistic and I thought by running another migration and decode the id (which is a cuid) could at least populate a correct createdAt value.