hrlib/enums/
position_type.rs

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use serde::Deserialize;
use serde::Serialize;
use std::str;
use strum_macros::EnumString;
#[cfg(feature = "diesel")]
use {
    diesel::backend::Backend,
    diesel::deserialize::FromSql,
    diesel::pg::Pg,
    diesel::serialize::{IsNull, Output, ToSql},
    diesel::types::Varchar,
    diesel::{deserialize, not_none, serialize},
    diesel::{AsExpression, FromSqlRow},
    std::io::Write,
};

#[derive(Debug, PartialEq, Clone, Serialize, Deserialize, EnumString)]
#[cfg_attr(feature = "diesel", derive(AsExpression, FromSqlRow))]
#[cfg_attr(feature = "diesel", sql_type = "Varchar")]
pub enum PositionType {
    Permanent,
    Contract,
    FixedContract,
    Temporary,
    Casual,
    Other,
}

#[cfg(feature = "diesel")]
impl ToSql<Varchar, Pg> for PositionType {
    fn to_sql<W: Write>(&self, out: &mut Output<W, Pg>) -> serialize::Result {
        match *self {
            PositionType::Permanent => out.write_all(b"Permanent")?,
            PositionType::Contract => out.write_all(b"Contract")?,
            PositionType::FixedContract => out.write_all(b"FixedContract")?,
            PositionType::Temporary => out.write_all(b"Temporary")?,
            PositionType::Casual => out.write_all(b"Casual")?,
            PositionType::Other => out.write_all(b"Other")?,
        }
        Ok(IsNull::No)
    }
}

#[cfg(feature = "diesel")]
impl FromSql<Varchar, Pg> for PositionType {
    fn from_sql(bytes: Option<&<Pg as Backend>::RawValue>) -> deserialize::Result<Self> {
        match not_none!(bytes) {
            b"Permanent" => Ok(PositionType::Permanent),
            b"Contract" => Ok(PositionType::Contract),
            b"FixedContract" => Ok(PositionType::FixedContract),
            b"Temporary" => Ok(PositionType::Temporary),
            b"Casual" => Ok(PositionType::Casual),
            b"Other" => Ok(PositionType::Other),
            _ => Err("Unrecognized enum variant".into()),
        }
    }
}