Error if unsupported field index type.

mathworks · Aug 2, 2023 · 8ff37f4 · 8ff37f4
1 parent a4251b8
commit 8ff37f4
Showing 1 changed file with 7 additions and 5 deletions.
diff --git a/matlab/src/matlab/+arrow/+tabular/Schema.m b/matlab/src/matlab/+arrow/+tabular/Schema.m
@@ -44,14 +44,16 @@
 
         function F = field(obj, idx)
             idx = convertCharsToStrings(idx);
-            % idx must be a positive whole number or field name.
-            if isstring(idx)
+            if isnumeric(idx) && idx >= 1
+                args = struct(Index=int32(idx));
+                proxyID = obj.Proxy.getFieldByIndex(args);
+            elseif isstring(idx)
                 name = idx;
                 args = struct(Name=name);
                 proxyID = obj.Proxy.getFieldByName(args);
-            elseif isnumeric(idx)
-                args = struct(Index=int32(idx));
-                proxyID = obj.Proxy.getFieldByIndex(args);
+            else
+                error(message("arrow:tabular:schema:UnsupportedFieldIndexType", ...
+                              "Index must be a positive scalar integer or a valid field name."));
             end
 
             proxy = libmexclass.proxy.Proxy(Name="arrow.type.proxy.Field", ID=proxyID);