Struct MigrationDependency

pub struct MigrationDependency { /* private fields */ }

Available on crate feature db only.

A migration dependency: a relationship between two migrations that tells the migration engine which migrations need to be applied before others.

Implementations

impl MigrationDependency

pub const fn migration(app: &'static str, migration: &'static str) -> Self

Creates a dependency on another migration.

This ensures that the migration engine will apply the migration with given app and migration name before the current migration.

pub const fn model(app: &'static str, table_name: Identifier) -> Self

Creates a dependency on a model.

This ensures that the migration engine will apply the migration that creates the model with the given app and table name before the current migration.

Trait Implementations

impl Clone for MigrationDependency

fn clone(&self) -> MigrationDependency

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MigrationDependency

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

Formats the value using the given formatter.

impl Hash for MigrationDependency

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for MigrationDependency

fn eq(&self, other: &MigrationDependency) -> 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 MigrationDependency

impl Eq for MigrationDependency

impl StructuralPartialEq for MigrationDependency