Struct ChangeHistory 

pub struct ChangeHistory {
    pub total: u64,
    pub first: u64,
    pub revisions: Vec<RevisionChanges>,
    pub broken: Option<String>,
}

What a read with history shows of a record’s revisions (GetContentInput::history): each asked for, oldest first, replayed from the original. The server and the seed runner build it the same way (Self::build)

Fields

total: u64

How many revisions the record has

first: u64

The index of the first one listed, from 0

revisions: Vec<RevisionChanges>

The ones asked for that replayed, oldest first

broken: Option<String>

Why the history stops short, when it does

Implementations

impl ChangeHistory

pub fn build( original: &Value, revisions: &[(GovernanceLogId, Revision)], dated: impl Fn(&GovernanceLogId) -> Option<DateTime<Utc>>, shown: impl Fn(&GovernanceLogId) -> bool, history: History, ) -> Self

The history of a record stored as original, revised by revisions in chain order (dated by dated), history of them, held to MAX_CHANGE_BYTES and MAX_HISTORY_BYTES A revision shown (a reader holds its changes already, and is pointed at them) costs the budget nothing

pub fn unreadable(total: usize, why: String) -> Self

No history, for a reason: the revisions could not be read

Trait Implementations

impl Clone for ChangeHistory

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 ChangeHistory

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

Formats the value using the given formatter.

impl Default for ChangeHistory

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ChangeHistory

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ChangeHistory

impl PartialEq for ChangeHistory

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ChangeHistory

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 ChangeHistory