correctly infer dtype (#34)

hdmf-dev · Apr 15, 2019 · c83cc2b · c83cc2b
1 parent 4d996b5
commit c83cc2b
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/hdmf/build/map.py b/src/hdmf/build/map.py
@@ -999,7 +999,7 @@ def __add_containers(self, builder, spec, value, build_manager, source, parent_c
                     builder.set_link(LinkBuilder(rendered_obj, name, builder))
                 elif isinstance(spec, DatasetSpec):
                     if rendered_obj.dtype is None and spec.dtype is not None:
-                        val, dtype = self.convert_dtype(spec, None)
+                        val, dtype = self.convert_dtype(spec, rendered_obj.data)
                         rendered_obj.dtype = dtype
                     builder.set_dataset(rendered_obj)
                 else: