I have saved a datetime value created by Luxon into a postgres database column, of type TIMESTAMP(3). I want to then use that value, convert it into other time zones, etc. However, I can't seem to figure out how to "use" it.
I created the object using the following
const { DateTime } = require("luxon");
const myDate = DateTime.now().toUTC().toISO()
I then inserted it into a postgres database, into a column of type TIMESTAMP(3).
I extract it out of the database using a query. When I log it, it says its value is:
console.log(extracted_date); //=> "2021-12-27T09:57:16.184Z"
console.log(typeof extracted_date); //=> object
// The following return "unparsable" or undefined objects
DateTime.fromISO(extracted_date);
DateTime.fromObject(extracted_date);
I can find plenty of tutorials about how to insert dates into sql, but nothing on how to take that date object and actually do something with it. I want to, for instance, convert its time zone.
To use that date object you can initiate a new Date, like so:
console.log(extracted_date); //=> "2021-12-27T09:57:16.184Z"
const javascriptDate = new Date(extracted_date);
Than you can use it directly or with the luxon library.
console.log(javascriptDate.toGMTString()); // => "Mon, 27 Dec 2021 09:57:16 GMT"
console.log(javascriptDate.toISOString()); // => "2021-12-27T09:57:16.184Z"
console.log(javascriptDate.valueOf()); // => 1640599036184
This object core is actually, a value that represents milliseconds since 1 January 1970 UTC, and added to that are time and string parsing functions, generally speaking.
If you want to read more about timestamp, here are some references: