sqlx_migrator 0.18.0

Migrator for writing sqlx migration using Rust instead of SQL
Documentation 
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use sqlx::{PgConnection, Postgres};
use sqlx_migrator::error::Error;
use sqlx_migrator::migration::Migration;
use sqlx_migrator::operation::Operation;

pub(crate) struct M0004Operation {
    id: i32,
    message: String,
}

#[async_trait::async_trait]
impl Operation<Postgres> for M0004Operation {
    async fn up(&self, connection: &mut PgConnection) -> Result<(), Error> {
        sqlx::query("INSERT INTO sample (id, name) VALUES ($1, $2)")
            .bind(self.id)
            .bind(&self.message)
            .execute(connection)
            .await?;
        Ok(())
    }

    async fn down(&self, connection: &mut PgConnection) -> Result<(), Error> {
        sqlx::query("DELETE FROM sample WHERE id = $1")
            .bind(self.id)
            .execute(connection)
            .await?;
        Ok(())
    }
}

pub(crate) struct M0004Migration {
    pub(crate) id: i32,
    pub(crate) message: String,
}

impl Migration<Postgres> for M0004Migration {
    fn app(&self) -> &'static str {
        "main"
    }

    fn name(&self) -> &'static str {
        "m0004_complex_operation"
    }

    fn parents(&self) -> Vec<Box<dyn Migration<Postgres>>> {
        vec![Box::new(
            crate::migrations::m0003_use_macros::M0003Migration,
        )]
    }

    fn operations(&self) -> Vec<Box<dyn Operation<Postgres>>> {
        vec![Box::new(M0004Operation {
            id: self.id,
            message: self.message.clone(),
        })]
    }
}