Struct Migration 

pub struct Migration {
    pub name: String,
    pub up: String,
    pub down: String,
    /* private fields */
}

One migration: its name, and what applies it (up) and reverts it (down). Either fixed SQL (Migration::new, files) or schema statements (Migration::schema).

Fields

name: String

The folder name, such as 20261108000000_create_users.

up: String

The contents of up.sql. Empty for a schema migration, which carries statements instead.

down: String

The contents of down.sql. Empty for a schema migration.

Implementations

impl Migration

pub fn new( name: impl Into<String>, up: impl Into<String>, down: impl Into<String>, ) -> Self

A migration from its name and SQL, for code that builds migrations itself.

pub fn schema( name: impl Into<String>, up: Vec<Statement>, down: Vec<Statement>, ) -> Self

A migration written with the schema builder. The statements are rendered for the connected database when the migrator runs or rolls it back, so one migration serves every database. A statement that cannot be rendered fails the migration with that error, before any of its SQL runs. The migration keeps the same transaction and batch behaviour as an SQL one.

Trait Implementations

impl Clone for Migration

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 Migration

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

Formats the value using the given formatter.