Fixed newtype serialization in multipart requests

CHANGELOG.md

@@ -26,6 +26,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Now Vec<MessageId> in requests serializes into [number] instead of [ {message_id: number} ], `forward_messages`, `copy_messages` and `delete_messages` now work properly
+- Now `ThreadId` is able to serialize in multipart requests
 
 ## 0.13.0 - 2024-08-16
 

crates/teloxide-core/src/serde_multipart/serializers.rs

@@ -374,6 +374,17 @@ impl Serializer for PartSerializer {
         Ok(JsonPartSerializer { buf: String::new(), state: PartSerializerStructState::Empty })
     }
 
+    fn serialize_newtype_struct<T: ?Sized>(
+        self,
+        _: &'static str,
+        value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: Serialize,
+    {
+        value.serialize(self)
+    }
+
     // Unimplemented
 
     fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
@@ -391,17 +402,6 @@ impl Serializer for PartSerializer {
         unimplemented!()
     }
 
-    fn serialize_newtype_struct<T: ?Sized>(
-        self,
-        _: &'static str,
-        _: &T,
-    ) -> Result<Self::Ok, Self::Error>
-    where
-        T: Serialize,
-    {
-        unimplemented!()
-    }
-
     fn serialize_newtype_variant<T: ?Sized>(
         self,
         _name: &'static str,