assert-migrator-reversible 6.2.0

For testing if Sea Orm Migrators are reversible
Documentation 
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use sea_orm_migration::prelude::*;

#[derive(DeriveMigrationName)]
pub struct Migration;

#[async_trait::async_trait]
impl MigrationTrait for Migration {
    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
        manager
            .create_table(
                Table::create()
                    .table(Book::Table)
                    .if_not_exists()
                    .col(
                        ColumnDef::new(Book::Id)
                            .integer()
                            .not_null()
                            .auto_increment()
                            .primary_key(),
                    )
                    .col(ColumnDef::new(Book::Name).string().not_null().unique_key())
                    .to_owned(),
            )
            .await
    }

    async fn down(&self, _manager: &SchemaManager) -> Result<(), DbErr> {
        Ok(())
    }
}

#[derive(Iden)]
pub enum Book {
    Table,
    Id,
    Name,
}