cleanup

backend/src/utils/json.rs

@@ -1,3 +1,4 @@
+use serde::Deserialize;
 use serde_json::Value;
 
 pub enum NullableValue {
@@ -14,3 +15,11 @@ pub fn classify_nullable(optional_value: Option<&Value>) -> Result<NullableValue
         Some(other) => Err(format!("expected string or null, got {other}")),
     }
 }
+
+pub fn deserialize_patch_field<'de, D, T>(deserializer: D) -> Result<Option<Option<T>>, D::Error>
+where
+    D: serde::Deserializer<'de>,
+    T: Deserialize<'de>,
+{
+    Option::<T>::deserialize(deserializer).map(Some)
+}