From 2dec63e6b057d25350c1b8b983ad6f6f579de4ed Mon Sep 17 00:00:00 2001
From: Bart de Water <496367+bdewater@users.noreply.github.com>
Date: Fri, 14 Oct 2022 19:40:20 -0400
Subject: [PATCH] Update request_end instrumentation example (#1095)

* Update request_end instrumentation example in README.md
---
 README.md | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index e32af3dd7..69dea24da 100644
--- a/README.md
+++ b/README.md
@@ -261,9 +261,13 @@ For example:
 
 ```ruby
 Stripe::Instrumentation.subscribe(:request_end) do |request_event|
+  # Filter out high-cardinality ids from `path`
+  path_parts = event.path.split("/").drop(2)
+  resource = path_parts.map { |part| part.match?(/\A[a-z_]+\z/) ? part : ":id" }.join("/")
+
   tags = {
     method: request_event.method,
-    resource: request_event.path.split('/')[2],
+    resource: resource,
     code: request_event.http_status,
     retries: request_event.num_retries
   }