Struct possum::Timestamp

pub struct Timestamp(/* private fields */);

Methods from Deref<Target = TimestampInner>

pub fn date(&self) -> NaiveDate

Retrieves a date component.

Example

use chrono::NaiveDate;

let dt = NaiveDate::from_ymd_opt(2016, 7, 8).unwrap().and_hms_opt(9, 10, 11).unwrap();
assert_eq!(dt.date(), NaiveDate::from_ymd_opt(2016, 7, 8).unwrap());

pub fn time(&self) -> NaiveTime

Retrieves a time component.

Example

use chrono::{NaiveDate, NaiveTime};

let dt = NaiveDate::from_ymd_opt(2016, 7, 8).unwrap().and_hms_opt(9, 10, 11).unwrap();
assert_eq!(dt.time(), NaiveTime::from_hms_opt(9, 10, 11).unwrap());

pub fn timestamp(&self) -> i64

Returns the number of non-leap seconds since the midnight on January 1, 1970.

Note that this does not account for the timezone! The true “UNIX timestamp” would count seconds since the midnight UTC on the epoch.

Example

use chrono::NaiveDate;

let dt = NaiveDate::from_ymd_opt(1970, 1, 1).unwrap().and_hms_milli_opt(0, 0, 1, 980).unwrap();
assert_eq!(dt.timestamp(), 1);

let dt = NaiveDate::from_ymd_opt(2001, 9, 9).unwrap().and_hms_opt(1, 46, 40).unwrap();
assert_eq!(dt.timestamp(), 1_000_000_000);

let dt = NaiveDate::from_ymd_opt(1969, 12, 31).unwrap().and_hms_opt(23, 59, 59).unwrap();
assert_eq!(dt.timestamp(), -1);

let dt = NaiveDate::from_ymd_opt(-1, 1, 1).unwrap().and_hms_opt(0, 0, 0).unwrap();
assert_eq!(dt.timestamp(), -62198755200);

pub fn timestamp_millis(&self) -> i64

Returns the number of non-leap milliseconds since midnight on January 1, 1970.

Note that this does not account for the timezone! The true “UNIX timestamp” would count seconds since the midnight UTC on the epoch.

Example

use chrono::NaiveDate;

let dt = NaiveDate::from_ymd_opt(1970, 1, 1).unwrap().and_hms_milli_opt(0, 0, 1, 444).unwrap();
assert_eq!(dt.timestamp_millis(), 1_444);

let dt = NaiveDate::from_ymd_opt(2001, 9, 9).unwrap().and_hms_milli_opt(1, 46, 40, 555).unwrap();
assert_eq!(dt.timestamp_millis(), 1_000_000_000_555);

let dt = NaiveDate::from_ymd_opt(1969, 12, 31).unwrap().and_hms_milli_opt(23, 59, 59, 100).unwrap();
assert_eq!(dt.timestamp_millis(), -900);

pub fn timestamp_micros(&self) -> i64

Returns the number of non-leap microseconds since midnight on January 1, 1970.

Note that this does not account for the timezone! The true “UNIX timestamp” would count seconds since the midnight UTC on the epoch.

Example

use chrono::NaiveDate;

let dt = NaiveDate::from_ymd_opt(1970, 1, 1).unwrap().and_hms_micro_opt(0, 0, 1, 444).unwrap();
assert_eq!(dt.timestamp_micros(), 1_000_444);

let dt = NaiveDate::from_ymd_opt(2001, 9, 9).unwrap().and_hms_micro_opt(1, 46, 40, 555).unwrap();
assert_eq!(dt.timestamp_micros(), 1_000_000_000_000_555);

pub fn timestamp_nanos(&self) -> i64

👎Deprecated since 0.4.31: use timestamp_nanos_opt() instead

Returns the number of non-leap nanoseconds since midnight on January 1, 1970.

Note that this does not account for the timezone! The true “UNIX timestamp” would count seconds since the midnight UTC on the epoch.

Panics

An i64 with nanosecond precision can span a range of ~584 years. This function panics on an out of range NaiveDateTime.

The dates that can be represented as nanoseconds are between 1677-09-21T00:12:44.0 and 2262-04-11T23:47:16.854775804.

pub fn timestamp_nanos_opt(&self) -> Option<i64>

Returns the number of non-leap nanoseconds since midnight on January 1, 1970.

Note that this does not account for the timezone! The true “UNIX timestamp” would count seconds since the midnight UTC on the epoch.

Errors

An i64 with nanosecond precision can span a range of ~584 years. This function returns None on an out of range NaiveDateTime.

The dates that can be represented as nanoseconds are between 1677-09-21T00:12:44.0 and 2262-04-11T23:47:16.854775804.

Example

use chrono::{NaiveDate, NaiveDateTime};

let dt = NaiveDate::from_ymd_opt(1970, 1, 1).unwrap().and_hms_nano_opt(0, 0, 1, 444).unwrap();
assert_eq!(dt.timestamp_nanos_opt(), Some(1_000_000_444));

let dt = NaiveDate::from_ymd_opt(2001, 9, 9).unwrap().and_hms_nano_opt(1, 46, 40, 555).unwrap();

const A_BILLION: i64 = 1_000_000_000;
let nanos = dt.timestamp_nanos_opt().unwrap();
assert_eq!(nanos, 1_000_000_000_000_000_555);
assert_eq!(
    Some(dt),
    NaiveDateTime::from_timestamp_opt(nanos / A_BILLION, (nanos % A_BILLION) as u32)
);

pub fn timestamp_subsec_millis(&self) -> u32

Returns the number of milliseconds since the last whole non-leap second.

The return value ranges from 0 to 999, or for leap seconds, to 1,999.

Example

use chrono::NaiveDate;

let dt = NaiveDate::from_ymd_opt(2016, 7, 8).unwrap().and_hms_nano_opt(9, 10, 11, 123_456_789).unwrap();
assert_eq!(dt.timestamp_subsec_millis(), 123);

let dt = NaiveDate::from_ymd_opt(2015, 7, 1).unwrap().and_hms_nano_opt(8, 59, 59, 1_234_567_890).unwrap();
assert_eq!(dt.timestamp_subsec_millis(), 1_234);

pub fn timestamp_subsec_micros(&self) -> u32

Returns the number of microseconds since the last whole non-leap second.

The return value ranges from 0 to 999,999, or for leap seconds, to 1,999,999.

Example

use chrono::NaiveDate;

let dt = NaiveDate::from_ymd_opt(2016, 7, 8).unwrap().and_hms_nano_opt(9, 10, 11, 123_456_789).unwrap();
assert_eq!(dt.timestamp_subsec_micros(), 123_456);

let dt = NaiveDate::from_ymd_opt(2015, 7, 1).unwrap().and_hms_nano_opt(8, 59, 59, 1_234_567_890).unwrap();
assert_eq!(dt.timestamp_subsec_micros(), 1_234_567);

pub fn timestamp_subsec_nanos(&self) -> u32

Returns the number of nanoseconds since the last whole non-leap second.

The return value ranges from 0 to 999,999,999, or for leap seconds, to 1,999,999,999.

Example

use chrono::NaiveDate;

let dt = NaiveDate::from_ymd_opt(2016, 7, 8).unwrap().and_hms_nano_opt(9, 10, 11, 123_456_789).unwrap();
assert_eq!(dt.timestamp_subsec_nanos(), 123_456_789);

let dt = NaiveDate::from_ymd_opt(2015, 7, 1).unwrap().and_hms_nano_opt(8, 59, 59, 1_234_567_890).unwrap();
assert_eq!(dt.timestamp_subsec_nanos(), 1_234_567_890);

pub fn format_with_items<'a, I, B>(&self, items: I) -> DelayedFormat<I>

where I: Iterator<Item = B> + Clone, B: Borrow<Item<'a>>,

Formats the combined date and time with the specified formatting items. Otherwise it is the same as the ordinary format method.

The Iterator of items should be Cloneable, since the resulting DelayedFormat value may be formatted multiple times.

Example

use chrono::NaiveDate;
use chrono::format::strftime::StrftimeItems;

let fmt = StrftimeItems::new("%Y-%m-%d %H:%M:%S");
let dt = NaiveDate::from_ymd_opt(2015, 9, 5).unwrap().and_hms_opt(23, 56, 4).unwrap();
assert_eq!(dt.format_with_items(fmt.clone()).to_string(), "2015-09-05 23:56:04");
assert_eq!(dt.format("%Y-%m-%d %H:%M:%S").to_string(),    "2015-09-05 23:56:04");

The resulting DelayedFormat can be formatted directly via the Display trait.

assert_eq!(format!("{}", dt.format_with_items(fmt)), "2015-09-05 23:56:04");

pub fn format<'a>(&self, fmt: &'a str) -> DelayedFormat<StrftimeItems<'a>>

Formats the combined date and time with the specified format string. See the format::strftime module on the supported escape sequences.

This returns a DelayedFormat, which gets converted to a string only when actual formatting happens. You may use the to_string method to get a String, or just feed it into print! and other formatting macros. (In this way it avoids the redundant memory allocation.)

A wrong format string does not issue an error immediately. Rather, converting or formatting the DelayedFormat fails. You are recommended to immediately use DelayedFormat for this reason.

Example

use chrono::NaiveDate;

let dt = NaiveDate::from_ymd_opt(2015, 9, 5).unwrap().and_hms_opt(23, 56, 4).unwrap();
assert_eq!(dt.format("%Y-%m-%d %H:%M:%S").to_string(), "2015-09-05 23:56:04");
assert_eq!(dt.format("around %l %p on %b %-d").to_string(), "around 11 PM on Sep 5");

The resulting DelayedFormat can be formatted directly via the Display trait.

assert_eq!(format!("{}", dt.format("%Y-%m-%d %H:%M:%S")), "2015-09-05 23:56:04");
assert_eq!(format!("{}", dt.format("around %l %p on %b %-d")), "around 11 PM on Sep 5");

pub fn and_local_timezone<Tz>(&self, tz: Tz) -> LocalResult<DateTime<Tz>>

where Tz: TimeZone,

Converts the NaiveDateTime into the timezone-aware DateTime<Tz> with the provided timezone, if possible.

This can fail in cases where the local time represented by the NaiveDateTime is not a valid local timestamp in the target timezone due to an offset transition for example if the target timezone had a change from +00:00 to +01:00 occuring at 2015-09-05 22:59:59, then a local time of 2015-09-05 23:56:04 could never occur. Similarly, if the offset transitioned in the opposite direction then there would be two local times of 2015-09-05 23:56:04, one at +00:00 and one at +01:00.

Example

use chrono::{NaiveDate, FixedOffset};
let hour = 3600;
let tz = FixedOffset::east_opt(5 * hour).unwrap();
let dt = NaiveDate::from_ymd_opt(2015, 9, 5).unwrap().and_hms_opt(23, 56, 4).unwrap().and_local_timezone(tz).unwrap();
assert_eq!(dt.timezone(), tz);

pub fn and_utc(&self) -> DateTime<Utc>

Converts the NaiveDateTime into the timezone-aware DateTime<Utc>.

Example

use chrono::{NaiveDate, Utc};
let dt = NaiveDate::from_ymd_opt(2023, 1, 30).unwrap().and_hms_opt(19, 32, 33).unwrap().and_utc();
assert_eq!(dt.timezone(), Utc);

pub const MIN: NaiveDateTime = _

pub const MAX: NaiveDateTime = _

pub const UNIX_EPOCH: NaiveDateTime = _

Trait Implementations

impl Clone for Timestamp

fn clone(&self) -> Timestamp

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Timestamp

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Deref for Timestamp

type Target = NaiveDateTime

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl FromSql for Timestamp

fn column_result(value: ValueRef<'_>) -> FromSqlResult<Self>

Converts SQLite value into Rust value.

impl PartialEq for Timestamp

fn eq(&self, other: &Timestamp) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Timestamp

fn partial_cmp(&self, other: &Timestamp) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for Timestamp

impl StructuralPartialEq for Timestamp