eiri commented on a change in pull request #626: Also enable node decom using
string "true"
URL: https://github.com/apache/couchdb/pull/626#discussion_r125319609
##########
File path: src/mem3/src/mem3.erl
##########
@@ -249,7 +249,10 @@ range(<<"shards/", Start:8/binary, "-", End:8/binary,
"/", _/binary>>) ->
httpd_util:hexlist_to_integer(binary_to_list(End))].
allowed_nodes() ->
- [Node || Node <- mem3:nodes(), mem3:node_info(Node, <<"decom">>) =/= true].
+ lists:filter(fun(Node) ->
+ Decom = mem3:node_info(Node, <<"decom">>),
+ (Decom =/= true) and (Decom =/= <<"true">>)
Review comment:
Right. A bit of the details here: `and` is a boolean operator with both
parts always evaluated and strictly speaking it's not intended for control,
while `andalso` is syntax sugar control's short-circuit which compiler expands
to nested `case` clause, so it's natural it used more in conditionals.
Essentially it is the same as writing `Decom /= true, Decom /= <<"true">>` just
in more user-friendly manner.
Basically I agree with @nickva, it's a minor nit, but `andalso` is more
fitting here.
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