Add unknown fields to ArraySerializable if more values are provided

Author: cffls

pycardano/serialization.py

@@ -489,7 +489,10 @@ def from_primitive(cls: ArrayBase, values: List[Primitive]) -> ArrayBase:
                 f.type = type_hints[f.name]
             v = _restore_dataclass_field(f, v)
             restored_vals.append(v)
-        return cls(*restored_vals)
+        obj = cls(*restored_vals)
+        for i in range(len(all_fields), len(values)):
+            setattr(obj, f"unknown_field{i - len(all_fields)}", values[i])
+        return obj
 
     def __repr__(self):
         return super().__repr__()
@@ -728,7 +731,9 @@ def copy(self) -> DictBase:
 
 
 @typechecked
-def list_hook(cls: Type[CBORBase]) -> Callable[[List[Primitive]], List[CBORBase]]:
+def list_hook(
+    cls: Type[CBORSerializable],
+) -> Callable[[List[Primitive]], List[CBORBase]]:
     """A factory that generates a Callable which turns a list of Primitive to a list of CBORSerializables.
 
     Args:

test/pycardano/test_serialization.py

@@ -24,6 +24,16 @@ class Test2(ArrayCBORSerializable):
     check_two_way_cbor(t)
 
 
+def test_array_cbor_serializable_unknown_fields():
+    @dataclass
+    class Test1(ArrayCBORSerializable):
+        a: str
+        b: str
+
+    t = Test1.from_primitive(["a", "b", "c"])
+    assert hasattr(t, "unknown_field0") and t.unknown_field0 == "c"
+
+
 def test_array_cbor_serializable_optional_field():
     @dataclass
     class Test1(ArrayCBORSerializable):