This library provides a derive macro for [TryFrom<tokio_postgres::Row>].

Example

/// This will try to get each column value by name.
#[derive(pg_mapper::TryFromRow)]
struct User {
email: String,
password_digest: String,
}

/// This will try to get each column value by index.
#[derive(pg_mapper::TryFromRow)]
struct Point(i32, i32, i32);

Generates:

impl TryFrom<tokio_postgres::Row> for User {
type Error = tokio_postgres::Error;
fn try_from(row: tokio_postgres::Row) -> Result<Self, Self::Error> {
Ok(Self {
email: row.try_get("email")?,
password_digest: row.try_get("password_digest")?,
})
}
}

impl TryFrom<tokio_postgres::Row> for Point {
type Error = tokio_postgres::Error;
fn try_from(row: tokio_postgres::Row) -> Result<Self, Self::Error> {
Ok(Self(row.try_get(0)?, row.try_get(1)?, row.try_get(2)?))
}
}