From 42ed7c7dc70ab648bdedfcee801504a8c37404d1 Mon Sep 17 00:00:00 2001
From: Rick van der Wal <rick@tweedegolf.com>
Date: Fri, 4 Aug 2023 17:20:16 +0200
Subject: [PATCH] Add error implementation for `ValidRejection`

---
 src/lib.rs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 5d8c6eb..f069262 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -19,6 +19,8 @@ pub mod typed_header;
 #[cfg(feature = "yaml")]
 pub mod yaml;
 
+use std::error::Error;
+use std::fmt::{Debug, Display, Formatter};
 use axum::async_trait;
 use axum::extract::{FromRequest, FromRequestParts};
 use axum::http::request::Parts;
@@ -54,6 +56,7 @@ impl<E> DerefMut for Valid<E> {
 
 /// If the valid extractor fails it'll use this "rejection" type.
 /// This rejection type can be converted into a response.
+#[derive(Debug)]
 pub enum ValidRejection<E> {
     /// Validation errors
     Valid(ValidationErrors),
@@ -61,6 +64,17 @@ pub enum ValidRejection<E> {
     Inner(E),
 }
 
+impl<E: Display> Display for ValidRejection<E> {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self {
+            ValidRejection::Valid(errors) => write!(f, "{errors}"),
+            ValidRejection::Inner(error) => write!(f, "{error}"),
+        }
+    }
+}
+
+impl<E: Debug + Display> Error for ValidRejection<E> {}
+
 impl<E> From<ValidationErrors> for ValidRejection<E> {
     fn from(value: ValidationErrors) -> Self {
         Self::Valid(value)