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simple_error::*; -fn main() -> Result<()> { - let manager = SqliteConnectionManager::memory(); //file(":memory:"); - let pool = r2d2::Pool::new(manager).unwrap(); - let conn = pool.get().unwrap(); +fn main() -> Result<(), SimpleError> { + let matches = App::new("Rust DB Play") + .version("1.0") + .author("Jonathan Altman ") + .about("Test out Rust database result serialization") + .subcommand(SubCommand::with_name("sqlite") + .about("Test on sqlite")) + .subcommand(SubCommand::with_name("postgres") + .about("Test on postgres")) + .get_matches(); - conn.execute( - "CREATE TABLE person ( + return match matches.subcommand_name() { + Some("sqlite") => test_sqlite(), + Some("postgres") => test_postgres(), + None => bail!("No database specified"), + _ => bail!("Unknown database specified") + }; +} + +fn test_postgres() -> Result<(), SimpleError> { + println!("Postgres: Not implemented yet"); + return Ok(()); +} + +fn test_sqlite() -> Result<(), SimpleError> { + let (conn, table_name) = setup_sqlite().unwrap(); + return match test_sqlite_json(conn, &table_name) { + Ok(()) => Ok(()), + // @TODO (2019-11-19, Jonathan) Extract sqlite error here + Err(_) => bail!("Error in testing sqlite") + }; +} + +fn setup_sqlite() -> SRResult<(PooledConnection, String)> { + fn setup_conn() -> PooledConnection { + let manager = SqliteConnectionManager::memory(); + let pool = r2d2::Pool::new(manager).unwrap(); + let conn = pool.get().unwrap(); + conn + } + fn setup_db_structure(conn: &PooledConnection) -> SRResult<()> { + conn.execute( + "CREATE TABLE person ( id INTEGER PRIMARY KEY, name TEXT NOT NULL, time_created TEXT NOT NULL, - data BLOB + data BLOB, + data_null BLOB )", - params![], - )?; - - conn.execute( - "INSERT INTO person (name, time_created, data) - VALUES (?1, ?2, ?3)", - params!["Steven".to_string(), time::get_time(), None as Option>], - )?; - - let mut stmt = conn.prepare("SELECT id, name, time_created, data FROM person")?; - let perjson_iter = stmt.query_map(params![], |row| { - Ok(from_row::>(row).unwrap()) - })?; - - for perjson in perjson_iter { - println!("Found person {:?}", serde_json::to_string(&perjson.unwrap()).unwrap()); - } - Ok(()) + params![], + )?; + + conn.execute( + "INSERT INTO person (name, time_created, data, data_null) + VALUES (?1, ?2, ?3, ?4)", + params![ + "Steven".to_string(), + time::get_time(), + "This is some text".to_string(), + None as Option> + ], + )?; + Ok(()) + } + let conn = setup_conn(); + setup_db_structure(&conn)?; + Ok((conn, "person".to_string())) +} + +fn test_sqlite_json(conn: PooledConnection, table_name: &String) -> SRResult<()>{ + let mut stmt = conn.prepare(&format!("SELECT * FROM {}", table_name))?; + let result_iter = stmt.query_map(params![], |row| { + Ok(from_row::>(row).unwrap()) + })?; + for cur_result in result_iter { + println!( + "Found row {:?}", + serde_json::to_string(&cur_result.unwrap()).unwrap() + ); + } + Ok(()) }