fix(client_attrs): fix client_attrs extraction loop

apps/emqx/src/emqx_channel.erl

@@ -1636,7 +1636,7 @@ maybe_set_client_initial_attrs(ConnPkt, #{zone := Zone} = ClientInfo) ->
 initialize_client_attrs(Inits, ClientInfo) ->
     lists:foldl(
         fun(#{expression := Variform, set_as_attr := Name}, Acc) ->
-            Attrs = maps:get(client_attrs, ClientInfo, #{}),
+            Attrs = maps:get(client_attrs, Acc, #{}),
             case emqx_variform:render(Variform, ClientInfo) of
                 {ok, <<>>} ->
                     ?SLOG(

apps/emqx/test/emqx_client_SUITE.erl

@@ -422,6 +422,10 @@ t_client_attr_from_user_property(_Config) ->
         #{
             expression => Compiled,
             set_as_attr => <<"group">>
+        },
+        #{
+            expression => Compiled,
+            set_as_attr => <<"group2">>
         }
     ]),
     SslConf = emqx_common_test_helpers:client_mtls('tlsv1.3'),
@@ -436,7 +440,7 @@ t_client_attr_from_user_property(_Config) ->
     {ok, _} = emqtt:connect(Client),
     %% assert only two chars are extracted
     ?assertMatch(
-        #{clientinfo := #{client_attrs := #{<<"group">> := <<"g1">>}}},
+        #{clientinfo := #{client_attrs := #{<<"group">> := <<"g1">>, <<"group2">> := <<"g1">>}}},
         emqx_cm:get_chan_info(ClientId)
     ),
     emqtt:disconnect(Client).

apps/emqx_utils/test/emqx_variform_tests.erl

@@ -275,7 +275,7 @@ to_range_badarg_test_() ->
     ].
 
 iif_test_() ->
-    %% if clientid has to words separated by a -, take the suffix, and append with `/#`
+    %% if clientid has two words separated by a -, take the suffix, and append with `/#`
     Expr1 = "iif(nth(2,tokens(clientid,'-')),concat([nth(2,tokens(clientid,'-')),'/#']),'')",
     [
         ?_assertEqual({ok, <<"yes-A">>}, render("iif(a,'yes-A','no-A')", #{a => <<"x">>})),