Handle fields with source='*' (fixes #77)

rest_framework_dataclasses/serializers.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import collections
 import copy
 import dataclasses
 import datetime
@@ -665,6 +666,23 @@ def to_internal_value(self, data: Dict[str, Any]) -> T:
  """
  native_values = super(DataclassSerializer, self).to_internal_value(data)
 
+ # If the source is a wildcard, don't try to instantiate anything, but just return the native values as a dict.
+ # It'll be merged into the native values of the parent serializer by the parent class.
+ if self.source == '*':
+ return native_values
+
+ # If any fields have a wildcard source, their native value will hold a values dictionary instead of a dataclass,
+ # so convert them into a dataclass.
+ if any(field.source == '*' for field in self.fields.values()):
+ for field_name, tp in self.dataclass_definition.field_types.items():
+ if (
+ field_name in native_values and
+ dataclasses.is_dataclass(tp) and
+ isinstance(native_values[field_name], collections.abc.Mapping)
+ ):
+ dataclass_fields = {field.name: field for field in dataclasses.fields(tp)}
+ native_values[field_name] = _create_instance(tp, dataclass_fields, native_values[field_name])
+
  # Only insert empty sentinel value for non-supplied values when the root serializer is in partial mode, to
  # prevent them from showing up otherwise.
  if self.root.partial: