Struct MigrationRegistry 

pub struct MigrationRegistry { /* private fields */ }

Registry of all known migrations.

Use MigrationRegistry::register to add migrations, then MigrationRegistry::plan to compute the shortest path between versions.

Implementations

impl MigrationRegistry

pub fn new() -> Self

Create a new empty registry.

pub fn register(&mut self, m: impl Migration + 'static) -> &mut Self

Register a migration. Returns &mut Self for chaining.

pub fn plan( &self, from: (u64, u64, u64), to: (u64, u64, u64), ) -> ServerResult<MigrationPlan<'_>>

Compute the shortest migration path from from to to using BFS.

Returns an empty plan if from == to. Returns Err(ServerError::Migration(...)) if no path exists.

When multiple paths of equal length exist, BFS naturally picks one; the specific choice among equal-length paths is not guaranteed.

Trait Implementations

impl Default for MigrationRegistry

fn default() -> Self

Returns the “default value” for a type.