timesheetlib/enums/
leave_type.rs

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use std::fmt;
use std::fmt::Formatter;
use std::str;

use serde::Deserialize;
use serde::Serialize;

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

#[derive(Debug, PartialEq, Clone, Serialize, Deserialize)]
#[cfg_attr(
feature = "diesel",
derive(AsExpression, FromSqlRow),
sql_type = "Varchar"
)]

pub enum LeaveType {
    Regular ,
    Sick,
    Family,
    Unpayed,
    Other,
    Undefined,

}
impl fmt::Display for LeaveType {
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        write!(f, "{:?}", self)
    }
}
impl Default for LeaveType {
    fn default() -> Self {
        LeaveType::Undefined
    }
}


#[cfg(feature = "diesel")]
impl ToSql<Varchar, Pg> for LeaveType {
    fn to_sql<W: Write>(&self, out: &mut Output<W, Pg>) -> serialize::Result {
        match *self {
            LeaveType::Regular => out.write_all(b"Regular")?,
            LeaveType::Sick => out.write_all(b"Sick")?,
            LeaveType::Family => out.write_all(b"Family")?,
            LeaveType::Unpayed => out.write_all(b"Unpayed")?,
            LeaveType::Other => out.write_all(b"Other")?,
            LeaveType::Undefined => out.write_all(b"Undefined")?,
        }
        Ok(IsNull::No)
    }
}


#[cfg(feature = "diesel")]
impl FromSql<Varchar, Pg> for LeaveType {
    fn from_sql(bytes: Option<&<Pg as Backend>::RawValue>) -> deserialize::Result<Self> {
        match not_none!(bytes) {

            b"Regular" => Ok(LeaveType::Regular),
            b"Sick" => Ok(LeaveType::Sick),
            b"Family" => Ok(LeaveType::Family),
            b"Unpayed" => Ok(LeaveType::Unpayed),
            b"Other" => Ok(LeaveType::Other),
            b"Undefined" => Ok(LeaveType::Undefined),
            _ => Err("Unrecognized enum variant".into()),
        }
    }
}