assignmentlib/enums/
accessibility.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 Accessibility {
    All,
    Private,
    Organisational,
    Districtal,
    Regional,
    National,
    Public,
    Special,
    Federal,
    SystemWide,
    School,
}

#[cfg(feature = "diesel")]
impl ToSql<Varchar, Pg> for Accessibility {
    fn to_sql<W: Write>(&self, out: &mut Output<W, Pg>) -> serialize::Result {
        match *self {
            Accessibility::All => out.write_all(b"All")?,
            Accessibility::Private => out.write_all(b"Private")?,
            Accessibility::Organisational => out.write_all(b"Organisational")?,
            Accessibility::Districtal => out.write_all(b"Districtal")?,
            Accessibility::Regional => out.write_all(b"Regional")?,
            Accessibility::National => out.write_all(b"National")?,
            Accessibility::Public => out.write_all(b"Public")?,
            Accessibility::Special => out.write_all(b"Special")?,
            Accessibility::Federal => out.write_all(b"Federal")?,
            Accessibility::SystemWide => out.write_all(b"SystemWide")?,
            Accessibility::School => out.write_all(b"School")?,
        }
        Ok(IsNull::No)
    }
}

#[cfg(feature = "diesel")]
impl FromSql<Varchar, Pg> for Accessibility {
    fn from_sql(bytes: Option<&<Pg as Backend>::RawValue>) -> deserialize::Result<Self> {
        match not_none!(bytes) {
            b"All" => Ok(Accessibility::All),
            b"Private" => Ok(Accessibility::Private),
            b"Organisational" => Ok(Accessibility::Organisational),
            b"Districtal" => Ok(Accessibility::Districtal),
            b"Regional" => Ok(Accessibility::Regional),
            b"National" => Ok(Accessibility::National),
            b"Public" => Ok(Accessibility::Public),
            b"Special" => Ok(Accessibility::Special),
            b"Federal" => Ok(Accessibility::Federal),
            b"SystemWide" => Ok(Accessibility::SystemWide),
            b"School" => Ok(Accessibility::School),
            _ => Err("Unrecognized enum variant".into()),
        }
    }
}