Allow unexpected fields

Author: AlfioEmanueleFresta

CHANGELOG.md

@@ -6,9 +6,13 @@
 
 - Add support for `#[serde(skip)]` ([#14][])
 - Add support for generics ([#11][])
+- skip_serializing_if no longer incorrectly affects deserialization (fixes [#2][])
+- No longer fails deserialising maps with unknown fields ([#19][])
 
-[#14]: https://github.com/trussed-dev/serde-indexed/pull/14
+[#2]: https://github.com/trussed-dev/serde-indexed/issues/2
 [#11]: https://github.com/trussed-dev/serde-indexed/pull/11
+[#14]: https://github.com/trussed-dev/serde-indexed/pull/14
+[#19]: https://github.com/trussed-dev/serde-indexed/pull/19
 
 ## [v0.1.1][] (2024-04-03)
 

src/lib.rs

@@ -224,7 +224,8 @@ pub fn derive_deserialize(input: TokenStream) -> TokenStream {
                 match __serde_indexed_internal_key {
                     #(#match_fields)*
                     _ => {
-                        return Err(serde::de::Error::duplicate_field("inexistent field index"));
+                        // Ignore unknown keys by consuming their value
+                        let _ = map.next_value::<serde::de::IgnoredAny>()?;
                     }
                 }
             }