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178 lines (143 loc) · 4.72 KB
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// use sqlx::pool::PoolConnection;
use sqlx::sqlite::SqliteRow;
use sqlx::Connect;
use sqlx::Executor;
use sqlx::Row;
use sqlx::SqliteConnection;
// use sqlx::SqlitePool;
use anyhow::{anyhow, Context, Result};
use async_trait::async_trait;
use crate::database_migrator::{DatabaseMigrator, MigrationTransaction};
pub struct Sqlite {
db_url: String,
path: String,
}
impl Sqlite {
pub fn new(db_url: String) -> Self {
let path = crop_letters(&db_url, "sqlite://".len());
Sqlite {
db_url: db_url.clone(),
path: path.to_string(),
}
}
}
fn crop_letters(s: &str, pos: usize) -> &str {
match s.char_indices().skip(pos).next() {
Some((pos, _)) => &s[pos..],
None => "",
}
}
#[async_trait]
impl DatabaseMigrator for Sqlite {
fn database_type(&self) -> String {
"Sqlite".to_string()
}
fn can_migrate_database(&self) -> bool {
true
}
fn can_create_database(&self) -> bool {
true
}
fn can_drop_database(&self) -> bool {
true
}
fn get_database_name(&self) -> Result<String> {
let split: Vec<&str> = self.db_url.rsplitn(2, '/').collect();
if split.len() != 2 {
return Err(anyhow!("Failed to find database name in connection string"));
}
let db_name = split[0];
Ok(db_name.to_string())
}
async fn check_if_database_exists(&self, _db_name: &str) -> Result<bool> {
use std::path::Path;
Ok(Path::new(&self.path).exists())
}
async fn create_database(&self, _db_name: &str) -> Result<()> {
println!("DB {}", self.path);
// Opening a connection to sqlite creates the database.
let _ = SqliteConnection::connect(&self.db_url).await?;
Ok(())
}
async fn drop_database(&self, _db_name: &str) -> Result<()> {
std::fs::remove_file(&self.path)?;
Ok(())
}
async fn create_migration_table(&self) -> Result<()> {
let mut conn = SqliteConnection::connect(&self.db_url).await?;
sqlx::query(
r#"
CREATE TABLE IF NOT EXISTS __migrations (
migration TEXT PRIMARY KEY,
created TIMESTAMP NOT NULL DEFAULT current_timestamp
);
"#,
)
.execute(&mut conn)
.await
.context("Failed to create migration table")?;
Ok(())
}
async fn get_migrations(&self) -> Result<Vec<String>> {
let mut conn = SqliteConnection::connect(&self.db_url).await?;
let result = sqlx::query(
r#"
select migration from __migrations order by created
"#,
)
.try_map(|row: SqliteRow| row.try_get(0))
.fetch_all(&mut conn)
.await
.context("Failed to create migration table")?;
Ok(result)
}
async fn begin_migration(&self) -> Result<Box<dyn MigrationTransaction>> {
// let pool = SqlitePool::new(&self.db_url)
// .await
// .context("Failed to connect to pool")?;
// let tx = pool.begin().await?;
// Ok(Box::new(MigrationTransaction { transaction: tx }))
Ok(Box::new(SqliteMigration {
db_url: self.db_url.clone(),
}))
}
}
pub struct SqliteMigration {
db_url: String,
// pub transaction: sqlx::Transaction<PoolConnection<SqliteConnection>>,
}
#[async_trait]
impl MigrationTransaction for SqliteMigration {
async fn commit(self: Box<Self>) -> Result<()> {
// self.transaction.commit().await?;
Ok(())
}
async fn rollback(self: Box<Self>) -> Result<()> {
// self.transaction.rollback().await?;
Ok(())
}
async fn check_if_applied(&mut self, migration_name: &str) -> Result<bool> {
let mut conn = SqliteConnection::connect(&self.db_url).await?;
let result =
sqlx::query("select exists(select migration from __migrations where migration = $1)")
.bind(migration_name.to_string())
.try_map(|row: SqliteRow| row.try_get(0))
.fetch_one(&mut conn)
.await?;
Ok(result)
}
async fn execute_migration(&mut self, migration_sql: &str) -> Result<()> {
let mut conn = SqliteConnection::connect(&self.db_url).await?;
conn.execute(migration_sql).await?;
// self.transaction.execute(migration_sql).await?;
Ok(())
}
async fn save_applied_migration(&mut self, migration_name: &str) -> Result<()> {
let mut conn = SqliteConnection::connect(&self.db_url).await?;
sqlx::query("insert into __migrations (migration) values ($1)")
.bind(migration_name.to_string())
.execute(&mut conn)
.await?;
Ok(())
}
}