lib/arrow/field-containable.rb in red-arrow-0.14.1 vs lib/arrow/field-containable.rb in red-arrow-0.15.0

@@ -22,9 +22,12 @@
       when String, Symbol
         name = name_or_index
         get_field_by_name(name)
       when Integer
         index = name_or_index
+        raise if index < 0
+        index += n_fields if index < 0
+        return nil if index < 0 or index >= n_fields
         get_field(index)
       else
         message = "field name or index must be String, Symbol or Integer"
         message << ": <#{name_or_index.inspect}>"
         raise ArgumentError, message