50 lines
1.6 KiB
Rust
50 lines
1.6 KiB
Rust
use ood_persistence::r2d2_postgres::{postgres, NoTlsManager};
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pub use ood_persistence::r2d2_postgres::{
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NoTlsConnection as PostgresConnection, NoTlsPersistence as PostgresPersistence,
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NoTlsPool as PostgresPool,
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};
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pub use ood_persistence::{
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error::Result as QueryResult,
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syn::{ConnectionClient, PersistencePool, TransactionClient},
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};
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const DATABASE_URL: &str = "postgres://postgres:test@localhost:5577/x";
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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// create pool to our database
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let pool = create_postgres_pool();
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// initialize persistence
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let persistence = ood_persistence::r2d2_postgres::new(&pool);
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// get connection to database
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let mut conn = persistence.get_connection()?;
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// we can query something
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let res: i32 = conn.inner().query_one("select 1", &[])?.get(0);
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assert_eq!(res, 1);
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// and we can upgrade connection to transaction
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let mut trx = conn.start_transaction()?;
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// we can query or execute something in transaction
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let res: i32 = trx.inner().query_one("select 2", &[])?.get(0);
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assert_eq!(res, 2);
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// now we close transaction
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trx.rollback()?;
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// or trx.commit()?;
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// and we can use connection again as well
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let res: i32 = conn.inner().query_one("select 3", &[])?.get(0);
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assert_eq!(res, 3);
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Ok(())
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}
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pub fn create_postgres_pool() -> PostgresPool {
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let db_conn_config = DATABASE_URL
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.parse()
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.expect("Failed to convert database url to database config");
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let manager = NoTlsManager::new(db_conn_config, postgres::NoTls);
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PostgresPool::builder()
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.build(manager)
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.expect("Failed to create database pool")
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}
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