mikerhodes commented on code in PR #4394:
URL: https://github.com/apache/couchdb/pull/4394#discussion_r1082822189
##########
src/mango/src/mango_cursor_view.erl:
##########
@@ -248,6 +266,19 @@ view_cb({row, Row}, #mrargs{extra = Options} = Acc) ->
key = couch_util:get_value(key, Row),
doc = couch_util:get_value(doc, Row)
},
+ % This supports receiving our "arguments" either as just the `selector`
+ % or in the new record in `callback_args`. This is to support mid-upgrade
+ % clusters where the non-upgraded coordinator nodes will send the older
style.
+ % TODO remove this in a couple of couchdb versions.
Review Comment:
Okay. Sounds good.
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