From 87a2b0dac1936c4fe3a9bec612a2807c8ba294fa Mon Sep 17 00:00:00 2001
From: David Pedersen <david.pdrsn@gmail.com>
Date: Mon, 7 Mar 2022 16:37:34 +0100
Subject: [PATCH] Implement `IntoResponseParts` for `Option<T>` (#838)

---
 axum-core/src/response/into_response_parts.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/axum-core/src/response/into_response_parts.rs b/axum-core/src/response/into_response_parts.rs
index 5810bef7..e85855b1 100644
--- a/axum-core/src/response/into_response_parts.rs
+++ b/axum-core/src/response/into_response_parts.rs
@@ -80,6 +80,21 @@ pub trait IntoResponseParts {
     fn into_response_parts(self, res: ResponseParts) -> Result<ResponseParts, Self::Error>;
 }
 
+impl<T> IntoResponseParts for Option<T>
+where
+    T: IntoResponseParts,
+{
+    type Error = T::Error;
+
+    fn into_response_parts(self, res: ResponseParts) -> Result<ResponseParts, Self::Error> {
+        if let Some(inner) = self {
+            inner.into_response_parts(res)
+        } else {
+            Ok(res)
+        }
+    }
+}
+
 /// Parts of a response.
 ///
 /// Used with [`IntoResponseParts`].