datetime-default

DateTime NewType set for default time

When you want to use #[derive(Default)] to a struct, you may want the current time to be the default for DateTime. For this purpose, we have provided NewType that overrides the default value.

Examples

DateTimeDefaultNow

DateTime with current time as default

use chrono::{Local, TimeZone};
use datetime_default::DateTimeDefaultNow;

assert_eq!(
    DateTimeDefaultNow::<Local>::default(),
    Local.datetime_from_str("2022/10/10 23:40:11.695164300", "%Y/%m/%d %H:%M:%S%.9f").unwrap()
);

DateTimeDefaultUnix

DateTime with UNIX epoch as default

use chrono::{Utc, TimeZone};
use datetime_default::DateTimeDefaultUnix;

assert_eq!(
    DateTimeDefaultUnix::<Utc>::default(),
    Utc.datetime_from_str("1970/1/1 00:00:00", "%Y/%m/%d %H:%M:%S").unwrap()
);

Default Datetime with TimeZone

use chrono::{DateTime, FixedOffset, TimeZone};
use datetime_default::DateTimeDefaultUnix;

assert_eq!(
    DateTimeDefaultUnix::<FixedOffset, 9>::default(),
    DateTime::parse_from_rfc3339("1970-01-01T09:00:00+09:00").unwrap()
);