securitylib/enums/
category_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 CategoryType {
    Gate,
    Digital,
    Locker,
    Room,
    Other,
    Undefined,

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


#[cfg(feature = "diesel")]
impl ToSql<Varchar, Pg> for CategoryType {
    fn to_sql<W: Write>(&self, out: &mut Output<W, Pg>) -> serialize::Result {
        match *self {
            CategoryType::Gate => out.write_all(b"Gate")?,
            CategoryType::Digital => out.write_all(b"Digital")?,
            CategoryType::Locker => out.write_all(b"Locker")?,
            CategoryType::Room => out.write_all(b"Room")?,
            CategoryType::Other => out.write_all(b"Other")?,
            CategoryType::Undefined => out.write_all(b"Undefined")?,

        }
        Ok(IsNull::No)
    }
}


#[cfg(feature = "diesel")]
impl FromSql<Varchar, Pg> for CategoryType {
    fn from_sql(bytes: Option<&<Pg as Backend>::RawValue>) -> deserialize::Result<Self> {
        match not_none!(bytes) {
            b"Gate" => Ok(CategoryType::Gate),
            b"Digital" => Ok(CategoryType::Digital),
            b"Locker" => Ok(CategoryType::Locker),
            b"Room" => Ok(CategoryType::Room),
            b"Other" => Ok(CategoryType::Other),
            b"Undefined" => Ok(CategoryType::Undefined),

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