timesheetlib/enums/
payment_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 PaymentType {
    Salary,
    AnualLeave,
    Bonus,
    Support,
    FinalPay,
    Undefined,

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


#[cfg(feature = "diesel")]
impl ToSql<Varchar, Pg> for PaymentType {
    fn to_sql<W: Write>(&self, out: &mut Output<W, Pg>) -> serialize::Result {
        match *self {
            PaymentType::Salary => out.write_all(b"Salary")?,
            PaymentType::AnualLeave => out.write_all(b"AnualLeave")?,
            PaymentType::Bonus => out.write_all(b"Bonus")?,
            PaymentType::Support => out.write_all(b"Support")?,
            PaymentType::FinalPay => out.write_all(b"FinalPay")?,
            PaymentType::Undefined => out.write_all(b"Undefined")?,

        }
        Ok(IsNull::No)
    }
}


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

            b"Salary" => Ok(PaymentType::Salary),
            b"AnualLeave" => Ok(PaymentType::AnualLeave),
            b"Bonus" => Ok(PaymentType::Bonus),
            b"Support" => Ok(PaymentType::Support),
            b"FinalPay" => Ok(PaymentType::FinalPay),
            b"Undefined" => Ok(PaymentType::Undefined),

            _ => Err("Unrecognized enum variant".into()),
        }
    }
}