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use crate::{Result, ScalarType, Value}; use async_graphql_derive::Scalar; use chrono_tz::Tz; use std::str::FromStr; #[Scalar(internal)] impl ScalarType for Tz { fn type_name() -> &'static str { "TimeZone" } fn parse(value: &Value) -> Option<Self> { match value { Value::String(s) => Some(Tz::from_str(&s).ok()?), _ => None, } } fn to_json(&self) -> Result<serde_json::Value> { Ok(Tz::name(self).into()) } }