Avoid logging ActiveRecord::LogSubscriber as the query source when the source is ignored (#33455)

activerecord/lib/active_record/log_subscriber.rb

@@ -100,9 +100,10 @@ def debug(progname = nil, &block)
       end
 
       def log_query_source
-        source_line, line_number = extract_callstack(caller_locations)
+        line = extract_callstack(caller_locations)
 
-        if source_line
+        if line
+          source_line, line_number = line.path, line.lineno
           if defined?(::Rails.root)
             app_root = "#{::Rails.root}/"
             source_line = source_line.sub(app_root, "")
@@ -113,23 +114,19 @@ def log_query_source
       end
 
       def extract_callstack(callstack)
-        line = callstack.find do |frame|
+        callstack.find do |frame|
           frame.absolute_path && !ignored_callstack(frame.absolute_path)
         end
-
-        offending_line = line || callstack.first
-
-        [
-          offending_line.path,
-          offending_line.lineno
-        ]
       end
 
       RAILS_GEM_ROOT = File.expand_path("../../..", __dir__) + "/"
 
+      class_attribute :ignored_callstack_paths, default: [RAILS_GEM_ROOT, RbConfig::CONFIG["rubylibdir"]]
+
       def ignored_callstack(path)
-        path.start_with?(RAILS_GEM_ROOT) ||
-        path.start_with?(RbConfig::CONFIG["rubylibdir"])
+        ignored_callstack_paths.any? do |ignored_path|
+          path.start_with?(ignored_path)
+        end
       end
   end
 end

activerecord/test/cases/log_subscriber_test.rb

@@ -177,11 +177,24 @@ def test_vebose_query_logs
 
     logger = TestDebugLogSubscriber.new
     logger.sql(Event.new(0, sql: "hi mom!"))
+    assert_equal 2, @logger.logged(:debug).size
     assert_match(/↳/, @logger.logged(:debug).last)
   ensure
     ActiveRecord::Base.verbose_query_logs = false
   end
 
+  def test_verbose_query_with_ignored_callstack
+    ActiveRecord::Base.verbose_query_logs = true
+    ActiveRecord::LogSubscriber.ignored_callstack_paths.push("/")
+    logger = TestDebugLogSubscriber.new
+    logger.sql(Event.new(0, sql: "hi mom!"))
+    assert_equal 1, @logger.logged(:debug).size
+    assert_no_match(/↳/, @logger.logged(:debug).last)
+  ensure
+    ActiveRecord::LogSubscriber.ignored_callstack_paths.delete("/")
+    ActiveRecord::Base.verbose_query_logs = false
+  end
+
   def test_verbose_query_logs_disabled_by_default
     logger = TestDebugLogSubscriber.new
     logger.sql(Event.new(0, sql: "hi mom!"))