Type Alias MigrationTask 

pub type MigrationTask = Box<dyn Fn(Database) -> BoxFuture<'static, Result<(), Error>> + Send + Sync>;

Type alias for migration tasks (e.g., Create Table, Add Foreign Key).

Migration tasks are async closures that take a Database instance and return a boxed future that resolves to a Result. This allows for flexible, composable migration operations.

Type Definition

type MigrationTask = Box<
    dyn Fn(Database) -> BoxFuture<'static, Result<(), sqlx::Error>> + Send + Sync
>;

Parameters

• Database - Cloned database instance for the migration operation

Returns

• BoxFuture<'static, Result<(), sqlx::Error>> - Async result of the migration

Traits

• Send - Can be safely sent between threads
• Sync - Can be safely shared between threads

Example

let task: MigrationTask = Box::new(|db: Database| {
    Box::pin(async move {
        db.create_table::<User>().await?;
        Ok(())
    })
});

Aliased Type

pub struct MigrationTask(/* private fields */);