Function chrono::serde::ts_seconds_option::serialize [−][src]
pub fn serialize<S>(
opt: &Option<DateTime<Utc>>,
serializer: S
) -> Result<S::Ok, S::Error> where
S: Serializer,
Serialize a UTC datetime into an integer number of seconds since the epoch or none
Intended for use with serde
s serialize_with
attribute.
Example:
use chrono::serde::ts_seconds_option::serialize as to_tsopt; #[derive(Serialize)] struct S { #[serde(serialize_with = "to_tsopt")] time: Option<DateTime<Utc>> } let my_s = S { time: Some(Utc.ymd(2015, 5, 15).and_hms(10, 0, 0)), }; let as_string = serde_json::to_string(&my_s)?; assert_eq!(as_string, r#"{"time":1431684000}"#);