Struct MigrationCatalog 

pub struct MigrationCatalog<S: Schema> { /* private fields */ }

Immutable replay-verified migration catalog branded by one generated schema.

Implementations

impl<S: Schema> MigrationCatalog<S>

pub fn identity(&self, app_label: &str, name: &str) -> Result<MigrationId>

Construct one validated portable compound identity for catalog planning.

pub const fn fingerprint(&self) -> &Fingerprint

Return the canonical history-bundle fingerprint.

pub fn len(&self) -> usize

Return the number of replay-verified history entries.

pub fn is_empty(&self) -> bool

Report whether the catalog contains no committed migrations.

pub fn heads(&self) -> &[MigrationId]

Return graph heads in canonical compound-identity order.

pub fn entry(&self, index: usize) -> Option<MigrationHistoryEntry<'_>>

Inspect one history entry by deterministic topological ordinal.

pub fn preview_apply( &self, applied: impl IntoIterator<Item = MigrationId>, targets: Option<Vec<MigrationId>>, ) -> Result<MigrationPreview<S>>

Build a provider-free forward preview under this generated authority.

pub fn preview_rollback( &self, applied: impl IntoIterator<Item = MigrationId>, removals: impl IntoIterator<Item = MigrationId>, ) -> Result<MigrationPreview<S>>

Build a provider-free rollback preview for an explicit removal set.

pub async fn verify( &self, database: &Database<S>, ) -> Result<MigrationVerifyReport>

Verify the applied ledger and live managed semantics without mutation.

pub async fn applied_migrations( &self, database: &Database<S>, ) -> Result<Vec<MigrationId>>

Read the exact active applied set from this generated catalog’s journal.

Trait Implementations

impl<S: Clone + Schema> Clone for MigrationCatalog<S>

fn clone(&self) -> MigrationCatalog<S>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<S: Debug + Schema> Debug for MigrationCatalog<S>

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

Formats the value using the given formatter.