Struct MigrationCursor 

pub struct MigrationCursor { /* private fields */ }

MigrationCursor

Explicit migration resume cursor. This cursor tracks the next step index to execute in one migration plan. The migration runtime persists this cursor durably between executions.

Implementations

impl MigrationCursor

pub const fn start() -> Self

Construct the starting migration cursor.

pub const fn next_step(self) -> usize

Return the next migration step index to execute.

Trait Implementations

impl Clone for MigrationCursor

fn clone(&self) -> MigrationCursor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MigrationCursor

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

Formats the value using the given formatter.

impl Default for MigrationCursor

fn default() -> MigrationCursor

Returns the “default value” for a type.

impl PartialEq for MigrationCursor

fn eq(&self, other: &MigrationCursor) -> 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 Copy for MigrationCursor

impl Eq for MigrationCursor

impl StructuralPartialEq for MigrationCursor