jcoglan commented on code in PR #5858:
URL: https://github.com/apache/couchdb/pull/5858#discussion_r3201840246
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src/mango/src/mango_native_proc.erl:
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@@ -112,14 +112,30 @@ handle_call({prompt, [<<"ddoc">>, DDocId,
[<<"validate_doc_update">>], Args]}, _
Msg = [<<"validate_doc_update">>, DDocId],
{stop, {invalid_call, Msg}, {invalid_call, Msg}, St};
Selector ->
- [NewDoc, OldDoc, _Ctx, _SecObj] = Args,
- Struct = {[{<<"newDoc">>, NewDoc}, {<<"oldDoc">>, OldDoc}]},
- Reply =
- case mango_selector:match(Selector, Struct) of
- true -> true;
- _ -> {[{<<"forbidden">>, <<"document is not valid">>}]}
- end,
- {reply, Reply, St}
+ case mango_selector:has_allowed_fields(Selector, [<<"newDoc">>,
<<"oldDoc">>]) of
+ false ->
+ Msg =
+ <<"'validate_doc_update' may only contain 'newDoc' and
'oldDoc' as top-level fields">>,
Review Comment:
We added this b/c @janl encountered a really confusing error during testing
due to typing `"selector": { "x": 0 }` instead of `"selector": { "newDoc": {
"x": 0 } }`. If you omit `newDoc`, the resulting validation failure is
confusing, and we thought it better to alert the user that they are probably
making a mistake instead of returning an empty result set.
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