chrono convert DateTime to NaiveDate

Question

After a while of fiddling, I decided to ask the question here, because - others shallst not waste as much fiddling time as I have.

So, how to convert a DateTime<Utc> into a NaiveDate with Rusts chrono crate?

Here the "fill in the blanks" kind of test code:

#[test]
  fn test_utc_now_to_naive_date() {
    let utc_now = Utc::now();
    let now: NaiveDate = ???? // how?
  }

I attribute the fact, that in most languages, time and date function libraries are over- designed monsters to the PTSD people suffered from the Y2K bug...

We have traits like Datelike and should that not help converting one date-like thing into another? Well - I could not find the solution...

This method: https://docs.rs/chrono/latest/chrono/struct.DateTime.html#method.date_naive? — Jonas Fassbender, Feb 28 '23 at 11:49

score 4 · Accepted Answer · edited Mar 03 '23 at 11:02

4

The methods DateTime.naive_utc and NaiveDateTime.date are well documented:

let now: NaiveDate = utc_now.naive_utc().date();

Or the even simpler version from Jonas' comment, using DateTime.date_naive:

let now = utc_now.date_naive();

edited Mar 03 '23 at 11:02

E_net4

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answered Feb 28 '23 at 11:50

cafce25

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If you ctrl+F the page of DateTime for naive you find it in 5 secs. – cafce25 Feb 28 '23 at 11:54
I tried to intellisense my way to the solution. So ".into_ hmm... nothing as DateLike ...nope, ... from_datelike ... now way... etc ad nauseum" – BitTickler Feb 28 '23 at 11:55
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Well reading the documentation is an essential programming skill imho. – cafce25 Feb 28 '23 at 11:58
3

Also shows that intellisense isn't a great tool to discover parts of an API, nor is it designed to be one. – cafce25 Feb 28 '23 at 12:12

chrono convert DateTime to NaiveDate

1 Answers1