Struct HistoryEntry 

pub struct HistoryEntry {
    pub occurred_at: String,
    pub action: String,
    pub actor: String,
    pub changed: Value,
    pub reason: Option<String>,
    pub correlation_id: Option<String>,
}

Parse the reserved fields key (comma-separated) into trimmed field names. Absent/empty → empty vec, meaning “no projection — return every field”. One recorded change to a record.

changed is the capture layer’s diff shape, carried through verbatim: {field: {"from": old, "to": new}} for an update, and the full image as {field: {"to": v}} / {field: {"from": v}} for an insert / delete. The trail is DIFF-ONLY, so an update entry names only the fields that actually changed — a consumer wanting the record’s state at a point in time must re-anchor on the nearest full image and replay forward, which is what the insert/delete images exist for.

Fields

occurred_at: String

action: String

insert | update | delete, or a verb-emitted action.

actor: String

changed: Value

reason: Option<String>

correlation_id: Option<String>

Trait Implementations

impl Clone for HistoryEntry

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HistoryEntry

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for HistoryEntry

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for HistoryEntry

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

where __S: Serializer,

Serialize this value into the given Serde serializer.