teacherlib/enums/
award_leval.rs

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use serde::Deserialize;
use serde::Serialize;
use std::str;
#[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)]
#[cfg_attr(feature = "diesel", derive(AsExpression, FromSqlRow))]
#[cfg_attr(feature = "diesel", sql_type = "Varchar")]
pub enum AwardLeval {
    Gold,
    Silver,
    Bronze,
    None,
    Platinum,
    Other,

}

#[cfg(feature = "diesel")]
impl ToSql<Varchar, Pg> for AwardLeval {
    fn to_sql<W: Write>(&self, out: &mut Output<W, Pg>) -> serialize::Result {
        match *self {
            AwardLeval::Gold => out.write_all(b"Gold")?,
            AwardLeval::Silver => out.write_all(b"Silver")?,
            AwardLeval::Bronze => out.write_all(b"Bronze")?,
            AwardLeval::None => out.write_all(b"None")?,
            AwardLeval::Platinum => out.write_all(b"Platinum")?,
            AwardLeval::Other => out.write_all(b"Other")?,
        }
        Ok(IsNull::No)
    }
}

#[cfg(feature = "diesel")]
impl FromSql<Varchar, Pg> for AwardLeval {
    fn from_sql(bytes: Option<&<Pg as Backend>::RawValue>) -> deserialize::Result<Self> {
        match not_none!(bytes) {
            b"Gold" => Ok(AwardLeval::Gold),
            b"Silver" => Ok(AwardLeval::Silver),
            b"Bronze" => Ok(AwardLeval::Bronze),
            b"None" => Ok(AwardLeval::None),
            b"Platinum" => Ok(AwardLeval::Platinum),
            b"Other" => Ok(AwardLeval::Other),
            _ => Err("Unrecognized enum variant".into()),
        }
    }
}