Function chrono::serde::ts_milliseconds_option::deserialize
source · [−]pub fn deserialize<'de, D>(d: D) -> Result<Option<DateTime<Utc>>, D::Error> where
D: Deserializer<'de>,
Expand description
Deserialize a DateTime
from a millisecond timestamp or none
Intended for use with serde
s deserialize_with
attribute.
Example:
use chrono::serde::ts_milliseconds_option::deserialize as from_milli_tsopt;
#[derive(Deserialize, PartialEq, Debug)]
#[serde(untagged)]
enum E<T> {
V(T),
}
#[derive(Deserialize, PartialEq, Debug)]
struct S {
#[serde(default, deserialize_with = "from_milli_tsopt")]
time: Option<DateTime<Utc>>
}
let my_s: E<S> = serde_json::from_str(r#"{ "time": 1526522699918 }"#)?;
assert_eq!(my_s, E::V(S { time: Some(Utc.timestamp(1526522699, 918000000)) }));
let s: E<S> = serde_json::from_str(r#"{ "time": null }"#)?;
assert_eq!(s, E::V(S { time: None }));
let t: E<S> = serde_json::from_str(r#"{}"#)?;
assert_eq!(t, E::V(S { time: None }));