use serde::{Serialize, Serializer};
pub fn rating_serializer<S: Serializer>(v: &Option<f32>, serializer: S) -> Result<S::Ok, S::Error> {
let v = v
.as_ref()
.and_then(|v| Some((*v as f64 * 100.0).trunc() / 100.0));
Option::<f64>::serialize(&v, serializer)
}