async-graphql/src/scalars/uuid.rs

use crate::{InputValueError, InputValueResult, Result, ScalarType, Value};
use async_graphql_derive::Scalar;
use uuid::Uuid;

#[Scalar(internal)]
impl ScalarType for Uuid {
    fn type_name() -> &'static str {
        "UUID"
    }

    fn parse(value: &Value) -> InputValueResult<Self> {
        match value {
            Value::String(s) => Ok(Uuid::parse_str(&s)?),
            _ => Err(InputValueError::ExpectedType),
        }
    }

    fn to_json(&self) -> Result<serde_json::Value> {
        Ok(self.to_string().into())
    }
}