Struct TemporalMetadata 

pub struct TemporalMetadata {
    pub created_at: DateTime<Utc>,
    pub updated_at: DateTime<Utc>,
    pub last_confirmed_at: DateTime<Utc>,
    pub valid_from: DateTime<Utc>,
    pub valid_to: Option<DateTime<Utc>>,
    pub expires_at: Option<DateTime<Utc>>,
}

Validity and freshness metadata.

Fields

created_at: DateTime<Utc>

When the record was first written.

updated_at: DateTime<Utc>

When the record was last modified.

last_confirmed_at: DateTime<Utc>

When evidence last confirmed the record.

valid_from: DateTime<Utc>

When the fact started holding.

valid_to: Option<DateTime<Utc>>

When the fact stopped holding, if superseded.

expires_at: Option<DateTime<Utc>>

When an episodic record should stop being retrieved.

Implementations

impl TemporalMetadata

pub fn created_at(now: DateTime<Utc>) -> Self

Fresh metadata for a record created now.

pub fn with_ttl(self, ttl: Duration) -> Self

Apply an expiry ttl from now.

pub fn is_expired(&self, now: DateTime<Utc>) -> bool

Whether the record has passed its expiry at now.

pub fn days_since_confirmed(&self, now: DateTime<Utc>) -> i64

Whole days since the record was last confirmed.

Trait Implementations

impl Clone for TemporalMetadata

fn clone(&self) -> TemporalMetadata

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TemporalMetadata

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for TemporalMetadata

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for TemporalMetadata

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl Serialize for TemporalMetadata

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for TemporalMetadata