Extracting Error codes

[anwang2009]

Hi, I noticed the possible error kinds are

pub enum Kind {
    InvalidName,
    InvalidVersion,
    DivergentVersion(Migration, Migration),
    MissingVersion(Migration),
    InvalidMigrationPath(PathBuf, std::error::Error),
    ConfigError(String),
    Connection(String, Box<dyn std::error::Error + Sync + Send>),
}

From reading the codebase, afaict more specific errors such as tokio_postgres::error::Error (docs) are swallowed up as std::error::Error in Kind::Connection, so there is no way of extracting error codes. Is that correct?

[jxs]

Hi there, you can access the underlying error by calling source on refinery::Error

[anwang2009]

I see, I am trying to avoid doing a string parse for an error code. I don't think I can get around the parse if source is all I've got for now. thanks!

[jxs]

you don't need to string parse, you can do something like:

use rusqlite::{Connection, Error as SqliteError};
use std::error::Error;

mod embedded {
    use refinery::embed_migrations;
    embed_migrations!("../refinery/refinery/tests/sql_migrations");
}

#[tokio::main]
async fn main() {
    let mut conn = Connection::open_in_memory().unwrap();
    match embedded::migrations::runner().run(&mut conn) {
        Ok(_) => {}
        Err(err) => {
            if let Some(err) = err
                .source()
                .map(|source| source.downcast_ref::<SqliteError>())
            {
            // handle err
            }
        }
    }
}