From fb1808395e80920c66c53f8c1f39c23c3d6751ae Mon Sep 17 00:00:00 2001
From: Lorenz Leutgeb <lorenz.leutgeb@radicle.xyz>
Date: Tue, 31 Mar 2026 16:04:48 +0200
Subject: [PATCH] radicle/serde_ext: `fn null_to_default`

This function, taken from
<https://github.com/serde-rs/serde/issues/1098#issuecomment-760711617>,
allows to serialize `null` as the value provided by `Default::default`
for any type that also implements `serde::Deserialize`.
---
 crates/radicle/src/serde_ext.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/crates/radicle/src/serde_ext.rs b/crates/radicle/src/serde_ext.rs
index e39e891c..0be4643d 100644
--- a/crates/radicle/src/serde_ext.rs
+++ b/crates/radicle/src/serde_ext.rs
@@ -45,3 +45,13 @@ where
     let v: serde_json::Value = serde::Deserialize::deserialize(deserializer)?;
     Ok(T::deserialize(v).unwrap_or_default())
 }
+
+/// Deserialize a value, but if it is `null`, return the default value.
+pub(crate) fn null_to_default<'de, D, T>(deserializer: D) -> Result<T, D::Error>
+where
+    T: serde::Deserialize<'de> + Default,
+    D: serde::Deserializer<'de>,
+{
+    use serde::Deserialize as _;
+    Ok(Option::deserialize(deserializer)?.unwrap_or_default())
+}