Struct Precondition 

pub struct Precondition { /* private fields */ }

A condition on a record the transaction need not write, evaluated inside the commit.

Implementations

impl Precondition

pub fn absent(collection: impl Into<String>, id: impl Into<String>) -> Self

The record must not exist.

pub fn version( collection: impl Into<String>, id: impl Into<String>, version: u64, ) -> Self

The record’s __version must be version.

pub fn epoch( collection: impl Into<String>, id: impl Into<String>, epoch: u64, ) -> Self

The record’s authority epoch must be epoch.

pub fn lease( collection: impl Into<String>, id: impl Into<String>, lease_id: impl Into<String>, ) -> Self

lease_id must be an unexpired lease on the record.

Trait Implementations

impl Clone for Precondition

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 Precondition

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

Formats the value using the given formatter.

impl PartialEq for Precondition

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Precondition

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 Precondition