membphis commented on code in PR #12465:
URL: https://github.com/apache/apisix/pull/12465#discussion_r2244882716


##########
apisix/plugins/workflow.lua:
##########
@@ -116,10 +119,17 @@ function _M.check_schema(conf)
 
     for idx, rule in ipairs(conf.rules) do
          if rule.case then
-            local ok, err = expr.new(rule.case)
+            local expr, err = expr.new(rule.case)
             if not ok then
                 return false, "failed to validate the 'case' expression: " .. 
err
             end
+            setmetatable(rule, {

Review Comment:
   we should `getmetatable` first



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