initiativelib/enums/
participant_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 ParticipantType {
    Staff,
    Student,
    Person,
    School,
    Organization,
    Other,
}

#[cfg(feature = "diesel")]
impl ToSql<Varchar, Pg> for ParticipantType {
    fn to_sql<W: Write>(&self, out: &mut Output<W, Pg>) -> serialize::Result {
        match *self {
            ParticipantType::Staff => out.write_all(b"Staff")?,
            ParticipantType::Student => out.write_all(b"Student")?,
            ParticipantType::Person => out.write_all(b"Person")?,
            ParticipantType::School => out.write_all(b"School")?,
            ParticipantType::Organization => out.write_all(b"Organization")?,
            ParticipantType::Other => out.write_all(b"Other")?,
        }
        Ok(IsNull::No)
    }
}

#[cfg(feature = "diesel")]
impl FromSql<Varchar, Pg> for ParticipantType {
    fn from_sql(bytes: Option<&<Pg as Backend>::RawValue>) -> deserialize::Result<Self> {
        match not_none!(bytes) {
            b"Staff" => Ok(ParticipantType::Staff),
            b"Student" => Ok(ParticipantType::Student),
            b"Person" => Ok(ParticipantType::Person),
            b"School" => Ok(ParticipantType::School),
            b"Organization" => Ok(ParticipantType::Organization),
            b"Other" => Ok(ParticipantType::Other),
            _ => Err("Unrecognized enum variant".into()),
        }
    }
}