From eaa2c7f1c23e5c07719db51280831c5f340f78f2 Mon Sep 17 00:00:00 2001
From: Yutaka Kamei <kamei@yykamei.me>
Date: Mon, 4 Apr 2022 23:09:41 +0900
Subject: [PATCH] Remove #children fron BaseEvent

`#children` has been deprecated as of Rails 7.2.

https://github.com/rails/rails/pull/43390

Unlike Rails, I decided to remove `#children` from `BaseEvent`
since it'd be a techdebt to keep this method in the future,
and I guess this method would not be used very well.

By the way, I found this deprecation on Rails when I'm about to
add the support for `deprecation.rails` on #89. I hope this won't cause
problems for users who use this gem.
---
 lib/rails_band/base_event.rb                           |  5 ++---
 test/rails_band/action_cable/event/broadcast_test.rb   |  8 +-------
 .../action_cable/event/perform_action_test.rb          |  8 +-------
 .../event/transmit_subscription_confirmation_test.rb   |  8 +-------
 .../event/transmit_subscription_rejection_test.rb      |  7 +------
 test/rails_band/action_cable/event/transmit_test.rb    |  9 +--------
 .../action_controller/event/exist_fragment_test.rb     |  7 +------
 .../action_controller/event/expire_fragment_test.rb    |  7 +------
 .../action_controller/event/halted_callback_test.rb    |  7 +------
 .../action_controller/event/process_action_test.rb     |  7 +------
 .../action_controller/event/read_fragment_test.rb      |  7 +------
 .../action_controller/event/redirect_to_test.rb        |  7 +------
 .../action_controller/event/send_data_test.rb          |  7 +------
 .../action_controller/event/send_file_test.rb          |  7 +------
 .../action_controller/event/start_processing_test.rb   |  7 +------
 .../event/unpermitted_parameters_test.rb               |  7 +------
 .../action_controller/event/write_fragment_test.rb     |  7 +------
 test/rails_band/action_mailer/event/deliver_test.rb    |  7 +------
 test/rails_band/action_mailer/event/process_test.rb    |  7 +------
 .../action_view/event/render_collection_test.rb        |  7 +------
 .../action_view/event/render_partial_test.rb           |  7 +------
 .../action_view/event/render_template_test.rb          |  7 +------
 test/rails_band/active_job/event/discard_test.rb       | 10 +---------
 test/rails_band/active_job/event/enqueue_at_test.rb    |  7 +------
 test/rails_band/active_job/event/enqueue_retry_test.rb |  7 +------
 test/rails_band/active_job/event/enqueue_test.rb       |  7 +------
 test/rails_band/active_job/event/perform_start_test.rb |  7 +------
 test/rails_band/active_job/event/perform_test.rb       |  7 +------
 test/rails_band/active_job/event/retry_stopped_test.rb | 10 +---------
 .../active_record/event/instantiation_test.rb          |  7 +------
 test/rails_band/active_record/event/sql_test.rb        |  7 +------
 .../event/strict_loading_violation_test.rb             |  7 +------
 test/rails_band/active_storage/event/analyze_test.rb   |  7 +------
 test/rails_band/active_storage/event/preview_test.rb   |  7 +------
 .../event/service_delete_prefixed_test.rb              |  7 +------
 .../active_storage/event/service_delete_test.rb        |  7 +------
 .../event/service_download_chunk_test.rb               |  7 +------
 .../active_storage/event/service_download_test.rb      |  7 +------
 .../active_storage/event/service_exist_test.rb         |  7 +------
 .../event/service_streaming_download_test.rb           |  7 +------
 .../event/service_update_metadata_test.rb              |  7 +------
 .../active_storage/event/service_upload_test.rb        |  7 +------
 .../active_storage/event/service_url_test.rb           |  7 +------
 test/rails_band/active_storage/event/transform_test.rb |  7 +------
 .../active_support/event/cache_delete_multi_test.rb    |  7 +------
 .../active_support/event/cache_delete_test.rb          |  7 +------
 .../active_support/event/cache_exist_test.rb           |  7 +------
 .../active_support/event/cache_fetch_hit_test.rb       |  7 +------
 .../active_support/event/cache_generate_test.rb        |  7 +------
 .../active_support/event/cache_read_multi_test.rb      |  8 +-------
 .../rails_band/active_support/event/cache_read_test.rb |  8 +-------
 .../active_support/event/cache_write_multi_test.rb     |  7 +------
 .../active_support/event/cache_write_test.rb           |  7 +------
 53 files changed, 54 insertions(+), 328 deletions(-)

diff --git a/lib/rails_band/base_event.rb b/lib/rails_band/base_event.rb
index bfcbe319..7e1874b3 100644
--- a/lib/rails_band/base_event.rb
+++ b/lib/rails_band/base_event.rb
@@ -3,7 +3,7 @@
 module RailsBand
   # The base class of each Event class.
   class BaseEvent
-    attr_reader :name, :time, :end, :transaction_id, :children,
+    attr_reader :name, :time, :end, :transaction_id,
                 :cpu_time, :idle_time, :allocations, :duration
 
     # @param event [ActiveSupport::Notifications::Event]
@@ -13,7 +13,6 @@ def initialize(event)
       @time = event.time
       @end = event.end
       @transaction_id = event.transaction_id
-      @children = event.children
       @cpu_time = event.cpu_time
       @idle_time = event.idle_time
       @allocations = event.allocations
@@ -22,7 +21,7 @@ def initialize(event)
 
     def to_h
       @to_h ||= {
-        name: @name, time: @time, end: @end, transaction_id: @transaction_id, children: @children,
+        name: @name, time: @time, end: @end, transaction_id: @transaction_id,
         cpu_time: @cpu_time, idle_time: @idle_time, allocations: @allocations, duration: @duration
       }.merge!(
         public_methods(false).reject { |meth| non_hash_keys.include?(meth) }.each_with_object({}) do |meth, h|
diff --git a/test/rails_band/action_cable/event/broadcast_test.rb b/test/rails_band/action_cable/event/broadcast_test.rb
index 3cfff767..95e591e6 100644
--- a/test/rails_band/action_cable/event/broadcast_test.rb
+++ b/test/rails_band/action_cable/event/broadcast_test.rb
@@ -36,12 +36,6 @@ class BroadcastTest < ::ActionCable::Channel::TestCase
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    subscribe number: '2'
-    perform :hello, { name: 'J' }
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     subscribe number: '2'
     perform :hello, { name: 'J' }
@@ -69,7 +63,7 @@ class BroadcastTest < ::ActionCable::Channel::TestCase
   test 'calls #to_h' do
     subscribe number: '2'
     perform :hello, { name: 'J' }
-    %i[name time end transaction_id children cpu_time idle_time allocations duration broadcasting message
+    %i[name time end transaction_id cpu_time idle_time allocations duration broadcasting message
        coder].each do |key|
       assert_includes @event.to_h, key
     end
diff --git a/test/rails_band/action_cable/event/perform_action_test.rb b/test/rails_band/action_cable/event/perform_action_test.rb
index 35286690..8c8ceb43 100644
--- a/test/rails_band/action_cable/event/perform_action_test.rb
+++ b/test/rails_band/action_cable/event/perform_action_test.rb
@@ -36,12 +36,6 @@ class PerformActionTest < ::ActionCable::Channel::TestCase
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    subscribe number: '2'
-    perform :hello, { name: 'J' }
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     subscribe number: '2'
     perform :hello, { name: 'J' }
@@ -69,7 +63,7 @@ class PerformActionTest < ::ActionCable::Channel::TestCase
   test 'calls #to_h' do
     subscribe number: '2'
     perform :hello, { name: 'J' }
-    %i[name time end transaction_id children cpu_time idle_time allocations duration
+    %i[name time end transaction_id cpu_time idle_time allocations duration
        channel_class action data].each do |key|
       assert_includes @event.to_h, key
     end
diff --git a/test/rails_band/action_cable/event/transmit_subscription_confirmation_test.rb b/test/rails_band/action_cable/event/transmit_subscription_confirmation_test.rb
index cebed203..dfb4e426 100644
--- a/test/rails_band/action_cable/event/transmit_subscription_confirmation_test.rb
+++ b/test/rails_band/action_cable/event/transmit_subscription_confirmation_test.rb
@@ -36,12 +36,6 @@ class TransmitSubscriptionConfirmationTest < ::ActionCable::Channel::TestCase
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    subscribe number: '2'
-    perform :call_transmit, { name: 'J' }
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     subscribe number: '2'
     perform :call_transmit, { name: 'J' }
@@ -69,7 +63,7 @@ class TransmitSubscriptionConfirmationTest < ::ActionCable::Channel::TestCase
   test 'calls #to_h' do
     subscribe number: '2'
     perform :call_transmit, { name: 'J' }
-    %i[name time end transaction_id children cpu_time idle_time allocations duration channel_class].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration channel_class].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/action_cable/event/transmit_subscription_rejection_test.rb b/test/rails_band/action_cable/event/transmit_subscription_rejection_test.rb
index 8e86c32e..6f8b80f4 100644
--- a/test/rails_band/action_cable/event/transmit_subscription_rejection_test.rb
+++ b/test/rails_band/action_cable/event/transmit_subscription_rejection_test.rb
@@ -32,11 +32,6 @@ class TransmitSubscriptionRejectionTest < ::ActionCable::Channel::TestCase
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    subscribe number: '-3'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     subscribe number: '-3'
     assert_instance_of Float, @event.cpu_time
@@ -59,7 +54,7 @@ class TransmitSubscriptionRejectionTest < ::ActionCable::Channel::TestCase
 
   test 'calls #to_h' do
     subscribe number: '-3'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration channel_class].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration channel_class].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/action_cable/event/transmit_test.rb b/test/rails_band/action_cable/event/transmit_test.rb
index 5b773ae4..f9d06dad 100644
--- a/test/rails_band/action_cable/event/transmit_test.rb
+++ b/test/rails_band/action_cable/event/transmit_test.rb
@@ -36,12 +36,6 @@ class TransmitTest < ::ActionCable::Channel::TestCase
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    subscribe number: '2'
-    perform :call_transmit, { name: 'J' }
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     subscribe number: '2'
     perform :call_transmit, { name: 'J' }
@@ -69,8 +63,7 @@ class TransmitTest < ::ActionCable::Channel::TestCase
   test 'calls #to_h' do
     subscribe number: '2'
     perform :call_transmit, { name: 'J' }
-    %i[name time end transaction_id children cpu_time idle_time allocations duration
-       channel_class data via].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration channel_class data via].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/action_controller/event/exist_fragment_test.rb b/test/rails_band/action_controller/event/exist_fragment_test.rb
index 07fc9de9..1be399db 100644
--- a/test/rails_band/action_controller/event/exist_fragment_test.rb
+++ b/test/rails_band/action_controller/event/exist_fragment_test.rb
@@ -31,11 +31,6 @@ class ExistFragmentTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users'
     assert_instance_of Float, @event.cpu_time
@@ -58,7 +53,7 @@ class ExistFragmentTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/action_controller/event/expire_fragment_test.rb b/test/rails_band/action_controller/event/expire_fragment_test.rb
index 0a79714e..62a704cd 100644
--- a/test/rails_band/action_controller/event/expire_fragment_test.rb
+++ b/test/rails_band/action_controller/event/expire_fragment_test.rb
@@ -31,11 +31,6 @@ class ExpireFragmentTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users'
     assert_instance_of Float, @event.cpu_time
@@ -58,7 +53,7 @@ class ExpireFragmentTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/action_controller/event/halted_callback_test.rb b/test/rails_band/action_controller/event/halted_callback_test.rb
index d5ce9fee..0dab6e8b 100644
--- a/test/rails_band/action_controller/event/halted_callback_test.rb
+++ b/test/rails_band/action_controller/event/halted_callback_test.rb
@@ -30,11 +30,6 @@ class HaltedCallbackTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users/123/callback'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users/123/callback'
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class HaltedCallbackTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users/123/callback'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration filter].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration filter].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/action_controller/event/process_action_test.rb b/test/rails_band/action_controller/event/process_action_test.rb
index 1f3ed139..7c44e8d7 100644
--- a/test/rails_band/action_controller/event/process_action_test.rb
+++ b/test/rails_band/action_controller/event/process_action_test.rb
@@ -30,11 +30,6 @@ class ProcessActionTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users'
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class ProcessActionTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration controller action params headers
+    %i[name time end transaction_id cpu_time idle_time allocations duration controller action params headers
        format method path status view_runtime db_runtime].each do |key|
       assert_includes @event.to_h, key
     end
diff --git a/test/rails_band/action_controller/event/read_fragment_test.rb b/test/rails_band/action_controller/event/read_fragment_test.rb
index b1a75ead..55bddf29 100644
--- a/test/rails_band/action_controller/event/read_fragment_test.rb
+++ b/test/rails_band/action_controller/event/read_fragment_test.rb
@@ -31,11 +31,6 @@ class ReadFragmentTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users'
     assert_instance_of Float, @event.cpu_time
@@ -58,7 +53,7 @@ class ReadFragmentTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/action_controller/event/redirect_to_test.rb b/test/rails_band/action_controller/event/redirect_to_test.rb
index 7e5f5771..0b928756 100644
--- a/test/rails_band/action_controller/event/redirect_to_test.rb
+++ b/test/rails_band/action_controller/event/redirect_to_test.rb
@@ -31,11 +31,6 @@ class RedirectToTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users/123/redirect'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users/123/redirect'
     assert_instance_of Float, @event.cpu_time
@@ -58,7 +53,7 @@ class RedirectToTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users/123/redirect'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration
+    %i[name time end transaction_id cpu_time idle_time allocations duration
        status location].each do |key|
       assert_includes @event.to_h, key
     end
diff --git a/test/rails_band/action_controller/event/send_data_test.rb b/test/rails_band/action_controller/event/send_data_test.rb
index 441f9798..9a58a11e 100644
--- a/test/rails_band/action_controller/event/send_data_test.rb
+++ b/test/rails_band/action_controller/event/send_data_test.rb
@@ -31,11 +31,6 @@ class SendDataTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users/123/data'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users/123/data'
     assert_instance_of Float, @event.cpu_time
@@ -58,7 +53,7 @@ class SendDataTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users/123/data'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration
+    %i[name time end transaction_id cpu_time idle_time allocations duration
        filename type disposition status].each do |key|
       assert_includes @event.to_h, key
     end
diff --git a/test/rails_band/action_controller/event/send_file_test.rb b/test/rails_band/action_controller/event/send_file_test.rb
index 48c69a88..03689635 100644
--- a/test/rails_band/action_controller/event/send_file_test.rb
+++ b/test/rails_band/action_controller/event/send_file_test.rb
@@ -31,11 +31,6 @@ class SendFileTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users/123/file'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users/123/file'
     assert_instance_of Float, @event.cpu_time
@@ -58,7 +53,7 @@ class SendFileTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users/123/file'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration
+    %i[name time end transaction_id cpu_time idle_time allocations duration
        path filename type disposition status].each do |key|
       assert_includes @event.to_h, key
     end
diff --git a/test/rails_band/action_controller/event/start_processing_test.rb b/test/rails_band/action_controller/event/start_processing_test.rb
index 54a5a043..0dcd4297 100644
--- a/test/rails_band/action_controller/event/start_processing_test.rb
+++ b/test/rails_band/action_controller/event/start_processing_test.rb
@@ -30,11 +30,6 @@ class StartProcessingTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users'
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class StartProcessingTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration controller action params headers
+    %i[name time end transaction_id cpu_time idle_time allocations duration controller action params headers
        format method path].each do |key|
       assert_includes @event.to_h, key
     end
diff --git a/test/rails_band/action_controller/event/unpermitted_parameters_test.rb b/test/rails_band/action_controller/event/unpermitted_parameters_test.rb
index d8bc2187..fc9eda53 100644
--- a/test/rails_band/action_controller/event/unpermitted_parameters_test.rb
+++ b/test/rails_band/action_controller/event/unpermitted_parameters_test.rb
@@ -31,11 +31,6 @@ class UnpermittedParametersTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    patch "/users/#{@user.id}", params: { name: 'foo!', nickname: 'F', login_shell: 'zsh' }
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     patch "/users/#{@user.id}", params: { name: 'foo!', nickname: 'F', login_shell: 'zsh' }
     assert_instance_of Float, @event.cpu_time
@@ -58,7 +53,7 @@ class UnpermittedParametersTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     patch "/users/#{@user.id}", params: { name: 'foo!', nickname: 'F', login_shell: 'zsh' }
-    %i[name time end transaction_id children cpu_time idle_time allocations duration keys].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration keys].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/action_controller/event/write_fragment_test.rb b/test/rails_band/action_controller/event/write_fragment_test.rb
index f124813c..fbbfbfaf 100644
--- a/test/rails_band/action_controller/event/write_fragment_test.rb
+++ b/test/rails_band/action_controller/event/write_fragment_test.rb
@@ -31,11 +31,6 @@ class WriteFragmentTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users'
     assert_instance_of Float, @event.cpu_time
@@ -58,7 +53,7 @@ class WriteFragmentTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/action_mailer/event/deliver_test.rb b/test/rails_band/action_mailer/event/deliver_test.rb
index 5c284cc3..b5a26e99 100644
--- a/test/rails_band/action_mailer/event/deliver_test.rb
+++ b/test/rails_band/action_mailer/event/deliver_test.rb
@@ -31,11 +31,6 @@ class DeliverTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get "/users/#{@user.id}/welcome_email"
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get "/users/#{@user.id}/welcome_email"
     assert_instance_of Float, @event.cpu_time
@@ -58,7 +53,7 @@ class DeliverTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get "/users/#{@user.id}/welcome_email"
-    %i[name time end transaction_id children cpu_time idle_time allocations duration mailer message_id
+    %i[name time end transaction_id cpu_time idle_time allocations duration mailer message_id
        subject to from bcc cc date mail perform_deliveries].each do |key|
       assert_includes @event.to_h, key
     end
diff --git a/test/rails_band/action_mailer/event/process_test.rb b/test/rails_band/action_mailer/event/process_test.rb
index 54c3638e..578a90a6 100644
--- a/test/rails_band/action_mailer/event/process_test.rb
+++ b/test/rails_band/action_mailer/event/process_test.rb
@@ -31,11 +31,6 @@ class ProcessTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get "/users/#{@user.id}/welcome_email"
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get "/users/#{@user.id}/welcome_email"
     assert_instance_of Float, @event.cpu_time
@@ -58,7 +53,7 @@ class ProcessTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get "/users/#{@user.id}/welcome_email"
-    %i[name time end transaction_id children cpu_time idle_time allocations duration mailer action args].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration mailer action args].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/action_view/event/render_collection_test.rb b/test/rails_band/action_view/event/render_collection_test.rb
index 42a14a6b..05fc3f18 100644
--- a/test/rails_band/action_view/event/render_collection_test.rb
+++ b/test/rails_band/action_view/event/render_collection_test.rb
@@ -32,11 +32,6 @@ class RenderCollectionTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users'
     assert_instance_of Float, @event.cpu_time
@@ -59,7 +54,7 @@ class RenderCollectionTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration identifier layout count
+    %i[name time end transaction_id cpu_time idle_time allocations duration identifier layout count
        cache_hits].each do |key|
       assert_includes @event.to_h, key
     end
diff --git a/test/rails_band/action_view/event/render_partial_test.rb b/test/rails_band/action_view/event/render_partial_test.rb
index 23a38470..19b4c331 100644
--- a/test/rails_band/action_view/event/render_partial_test.rb
+++ b/test/rails_band/action_view/event/render_partial_test.rb
@@ -31,11 +31,6 @@ class RenderPartialTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get "/users/#{@user.id}"
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get "/users/#{@user.id}"
     assert_instance_of Float, @event.cpu_time
@@ -58,7 +53,7 @@ class RenderPartialTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get "/users/#{@user.id}"
-    %i[name time end transaction_id children cpu_time idle_time allocations duration identifier layout
+    %i[name time end transaction_id cpu_time idle_time allocations duration identifier layout
        cache_hit].each do |key|
       assert_includes @event.to_h, key
     end
diff --git a/test/rails_band/action_view/event/render_template_test.rb b/test/rails_band/action_view/event/render_template_test.rb
index 79024d34..acae1302 100644
--- a/test/rails_band/action_view/event/render_template_test.rb
+++ b/test/rails_band/action_view/event/render_template_test.rb
@@ -31,11 +31,6 @@ class RenderTemplateTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users'
     assert_instance_of Float, @event.cpu_time
@@ -58,7 +53,7 @@ class RenderTemplateTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration identifier layout].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration identifier layout].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_job/event/discard_test.rb b/test/rails_band/active_job/event/discard_test.rb
index 1a14fdd3..507b5227 100644
--- a/test/rails_band/active_job/event/discard_test.rb
+++ b/test/rails_band/active_job/event/discard_test.rb
@@ -42,14 +42,6 @@ class DiscardTest < ActionDispatch::IntegrationTest
     end
   end
 
-  test 'returns children' do
-    perform_enqueued_jobs do
-      DiscardJob.perform_later
-    rescue DiscardJob::Error
-      assert_instance_of Array, @event.children
-    end
-  end
-
   test 'returns cpu_time' do
     perform_enqueued_jobs do
       DiscardJob.perform_later
@@ -86,7 +78,7 @@ class DiscardTest < ActionDispatch::IntegrationTest
     perform_enqueued_jobs do
       DiscardJob.perform_later
     rescue DiscardJob::Error
-      %i[name time end transaction_id children cpu_time idle_time allocations duration adapter job error].each do |key|
+      %i[name time end transaction_id cpu_time idle_time allocations duration adapter job error].each do |key|
         assert_includes @event.to_h, key
       end
     end
diff --git a/test/rails_band/active_job/event/enqueue_at_test.rb b/test/rails_band/active_job/event/enqueue_at_test.rb
index a1b8cbe2..5b867563 100644
--- a/test/rails_band/active_job/event/enqueue_at_test.rb
+++ b/test/rails_band/active_job/event/enqueue_at_test.rb
@@ -30,11 +30,6 @@ class EnqueueAtTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/yay'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/yay'
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class EnqueueAtTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/yay'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration adapter job].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration adapter job].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_job/event/enqueue_retry_test.rb b/test/rails_band/active_job/event/enqueue_retry_test.rb
index a64ab1bb..5cd73606 100644
--- a/test/rails_band/active_job/event/enqueue_retry_test.rb
+++ b/test/rails_band/active_job/event/enqueue_retry_test.rb
@@ -30,11 +30,6 @@ class EnqueueRetryTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    FlakyJob.perform_now
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     FlakyJob.perform_now
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class EnqueueRetryTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     FlakyJob.perform_now
-    %i[name time end transaction_id children cpu_time idle_time allocations duration adapter job
+    %i[name time end transaction_id cpu_time idle_time allocations duration adapter job
        wait error].each do |key|
       assert_includes @event.to_h, key
     end
diff --git a/test/rails_band/active_job/event/enqueue_test.rb b/test/rails_band/active_job/event/enqueue_test.rb
index f4834400..041ffc28 100644
--- a/test/rails_band/active_job/event/enqueue_test.rb
+++ b/test/rails_band/active_job/event/enqueue_test.rb
@@ -30,11 +30,6 @@ class EnqueueTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/yay/123'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/yay/123'
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class EnqueueTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/yay/123'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration adapter job].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration adapter job].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_job/event/perform_start_test.rb b/test/rails_band/active_job/event/perform_start_test.rb
index a987186a..07d27fe2 100644
--- a/test/rails_band/active_job/event/perform_start_test.rb
+++ b/test/rails_band/active_job/event/perform_start_test.rb
@@ -30,11 +30,6 @@ class PerformStartTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    YayJob.perform_now(name: 'JJ', message: 'Hi')
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     YayJob.perform_now(name: 'JJ', message: 'Hi')
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class PerformStartTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     YayJob.perform_now(name: 'JJ', message: 'Hi')
-    %i[name time end transaction_id children cpu_time idle_time allocations duration adapter job].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration adapter job].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_job/event/perform_test.rb b/test/rails_band/active_job/event/perform_test.rb
index b11be5ac..bafefeed 100644
--- a/test/rails_band/active_job/event/perform_test.rb
+++ b/test/rails_band/active_job/event/perform_test.rb
@@ -30,11 +30,6 @@ class PerformTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    YayJob.perform_now(name: 'JJ', message: 'Hi')
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     YayJob.perform_now(name: 'JJ', message: 'Hi')
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class PerformTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     YayJob.perform_now(name: 'JJ', message: 'Hi')
-    %i[name time end transaction_id children cpu_time idle_time allocations duration adapter job].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration adapter job].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_job/event/retry_stopped_test.rb b/test/rails_band/active_job/event/retry_stopped_test.rb
index a7f857c8..04101e66 100644
--- a/test/rails_band/active_job/event/retry_stopped_test.rb
+++ b/test/rails_band/active_job/event/retry_stopped_test.rb
@@ -42,14 +42,6 @@ class RetryStoppedTest < ActionDispatch::IntegrationTest
     end
   end
 
-  test 'returns children' do
-    perform_enqueued_jobs do
-      FlakyJob.perform_later
-    rescue FlakyJob::Error
-      assert_instance_of Array, @event.children
-    end
-  end
-
   test 'returns cpu_time' do
     perform_enqueued_jobs do
       FlakyJob.perform_later
@@ -86,7 +78,7 @@ class RetryStoppedTest < ActionDispatch::IntegrationTest
     perform_enqueued_jobs do
       FlakyJob.perform_later
     rescue FlakyJob::Error
-      %i[name time end transaction_id children cpu_time idle_time allocations duration adapter job error].each do |key|
+      %i[name time end transaction_id cpu_time idle_time allocations duration adapter job error].each do |key|
         assert_includes @event.to_h, key
       end
     end
diff --git a/test/rails_band/active_record/event/instantiation_test.rb b/test/rails_band/active_record/event/instantiation_test.rb
index 345d8271..ec808e91 100644
--- a/test/rails_band/active_record/event/instantiation_test.rb
+++ b/test/rails_band/active_record/event/instantiation_test.rb
@@ -31,11 +31,6 @@ class InstantiationTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get "/users/#{@user.id}"
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get "/users/#{@user.id}"
     assert_instance_of Float, @event.cpu_time
@@ -58,7 +53,7 @@ class InstantiationTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get "/users/#{@user.id}"
-    %i[name time end transaction_id children cpu_time idle_time allocations duration record_count
+    %i[name time end transaction_id cpu_time idle_time allocations duration record_count
        class_name].each do |key|
       assert_includes @event.to_h, key
     end
diff --git a/test/rails_band/active_record/event/sql_test.rb b/test/rails_band/active_record/event/sql_test.rb
index dbf7550c..fd88c023 100644
--- a/test/rails_band/active_record/event/sql_test.rb
+++ b/test/rails_band/active_record/event/sql_test.rb
@@ -31,11 +31,6 @@ class SqlTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get "/users/#{@user.id}"
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get "/users/#{@user.id}"
     assert_instance_of Float, @event.cpu_time
@@ -58,7 +53,7 @@ class SqlTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get "/users/#{@user.id}"
-    %i[name time end transaction_id children cpu_time idle_time allocations duration sql sql_name binds
+    %i[name time end transaction_id cpu_time idle_time allocations duration sql sql_name binds
        type_casted_binds connection statement_name async cached].each do |key|
       assert_includes @event.to_h, key
     end
diff --git a/test/rails_band/active_record/event/strict_loading_violation_test.rb b/test/rails_band/active_record/event/strict_loading_violation_test.rb
index b686a134..17b76f95 100644
--- a/test/rails_band/active_record/event/strict_loading_violation_test.rb
+++ b/test/rails_band/active_record/event/strict_loading_violation_test.rb
@@ -45,11 +45,6 @@ class StrictLoadingViolationTest < ActionDispatch::IntegrationTest
       assert_instance_of String, @event.transaction_id
     end
 
-    test 'returns children' do
-      get "/users/#{@user.id}/notes"
-      assert_instance_of Array, @event.children
-    end
-
     test 'returns cpu_time' do
       get "/users/#{@user.id}/notes"
       assert_instance_of Float, @event.cpu_time
@@ -72,7 +67,7 @@ class StrictLoadingViolationTest < ActionDispatch::IntegrationTest
 
     test 'calls #to_h' do
       get "/users/#{@user.id}/notes"
-      %i[name time end transaction_id children cpu_time idle_time allocations duration owner
+      %i[name time end transaction_id cpu_time idle_time allocations duration owner
          reflection].each do |key|
         assert_includes @event.to_h, key
       end
diff --git a/test/rails_band/active_storage/event/analyze_test.rb b/test/rails_band/active_storage/event/analyze_test.rb
index a46b9612..df03d5b0 100644
--- a/test/rails_band/active_storage/event/analyze_test.rb
+++ b/test/rails_band/active_storage/event/analyze_test.rb
@@ -31,11 +31,6 @@ class AnalyzeTest < ActionDispatch::IntegrationTest
       assert_instance_of String, @event.transaction_id
     end
 
-    test 'returns children' do
-      post '/teams/analyze', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-      assert_instance_of Array, @event.children
-    end
-
     test 'returns cpu_time' do
       post '/teams/analyze', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
       assert_instance_of Float, @event.cpu_time
@@ -58,7 +53,7 @@ class AnalyzeTest < ActionDispatch::IntegrationTest
 
     test 'calls #to_h' do
       post '/teams/analyze', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-      %i[name time end transaction_id children cpu_time idle_time allocations duration analyzer].each do |key|
+      %i[name time end transaction_id cpu_time idle_time allocations duration analyzer].each do |key|
         assert_includes @event.to_h, key
       end
     end
diff --git a/test/rails_band/active_storage/event/preview_test.rb b/test/rails_band/active_storage/event/preview_test.rb
index fe51b7f5..730f2f4c 100644
--- a/test/rails_band/active_storage/event/preview_test.rb
+++ b/test/rails_band/active_storage/event/preview_test.rb
@@ -30,11 +30,6 @@ class PreviewTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    post '/teams/preview', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     post '/teams/preview', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class PreviewTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     post '/teams/preview', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_storage/event/service_delete_prefixed_test.rb b/test/rails_band/active_storage/event/service_delete_prefixed_test.rb
index 9fdc2590..b4e57681 100644
--- a/test/rails_band/active_storage/event/service_delete_prefixed_test.rb
+++ b/test/rails_band/active_storage/event/service_delete_prefixed_test.rb
@@ -30,11 +30,6 @@ class ServiceDeletePrefixedTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class ServiceDeletePrefixedTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    %i[name time end transaction_id children cpu_time idle_time allocations duration prefix service].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration prefix service].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_storage/event/service_delete_test.rb b/test/rails_band/active_storage/event/service_delete_test.rb
index 14355610..5529550b 100644
--- a/test/rails_band/active_storage/event/service_delete_test.rb
+++ b/test/rails_band/active_storage/event/service_delete_test.rb
@@ -30,11 +30,6 @@ class ServiceDeleteTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class ServiceDeleteTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key service].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key service].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_storage/event/service_download_chunk_test.rb b/test/rails_band/active_storage/event/service_download_chunk_test.rb
index 1bcb0ce7..b89b5d7a 100644
--- a/test/rails_band/active_storage/event/service_download_chunk_test.rb
+++ b/test/rails_band/active_storage/event/service_download_chunk_test.rb
@@ -30,11 +30,6 @@ class ServiceDownloadChunkTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class ServiceDownloadChunkTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key service range].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key service range].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_storage/event/service_download_test.rb b/test/rails_band/active_storage/event/service_download_test.rb
index 38469b88..48990f68 100644
--- a/test/rails_band/active_storage/event/service_download_test.rb
+++ b/test/rails_band/active_storage/event/service_download_test.rb
@@ -30,11 +30,6 @@ class ServiceDownloadTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class ServiceDownloadTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key service].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key service].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_storage/event/service_exist_test.rb b/test/rails_band/active_storage/event/service_exist_test.rb
index 56cae9ea..f844f124 100644
--- a/test/rails_band/active_storage/event/service_exist_test.rb
+++ b/test/rails_band/active_storage/event/service_exist_test.rb
@@ -30,11 +30,6 @@ class ServiceExistTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class ServiceExistTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key service exist].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key service exist].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_storage/event/service_streaming_download_test.rb b/test/rails_band/active_storage/event/service_streaming_download_test.rb
index 98643fda..16320946 100644
--- a/test/rails_band/active_storage/event/service_streaming_download_test.rb
+++ b/test/rails_band/active_storage/event/service_streaming_download_test.rb
@@ -30,11 +30,6 @@ class ServiceStreamingDownloadTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class ServiceStreamingDownloadTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key service].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key service].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_storage/event/service_update_metadata_test.rb b/test/rails_band/active_storage/event/service_update_metadata_test.rb
index 810a28d7..6cef1187 100644
--- a/test/rails_band/active_storage/event/service_update_metadata_test.rb
+++ b/test/rails_band/active_storage/event/service_update_metadata_test.rb
@@ -30,11 +30,6 @@ class ServiceUpdateMetadataTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class ServiceUpdateMetadataTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key service
+    %i[name time end transaction_id cpu_time idle_time allocations duration key service
        content_type disposition].each do |key|
       assert_includes @event.to_h, key
     end
diff --git a/test/rails_band/active_storage/event/service_upload_test.rb b/test/rails_band/active_storage/event/service_upload_test.rb
index ad21f7c8..6982bf86 100644
--- a/test/rails_band/active_storage/event/service_upload_test.rb
+++ b/test/rails_band/active_storage/event/service_upload_test.rb
@@ -30,11 +30,6 @@ class ServiceUploadTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class ServiceUploadTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key checksum service].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key checksum service].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_storage/event/service_url_test.rb b/test/rails_band/active_storage/event/service_url_test.rb
index b25f98c9..c9683b07 100644
--- a/test/rails_band/active_storage/event/service_url_test.rb
+++ b/test/rails_band/active_storage/event/service_url_test.rb
@@ -30,11 +30,6 @@ class ServiceUrlTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class ServiceUrlTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     post '/teams', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key service url].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key service url].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_storage/event/transform_test.rb b/test/rails_band/active_storage/event/transform_test.rb
index 186f04f4..0a23ff8c 100644
--- a/test/rails_band/active_storage/event/transform_test.rb
+++ b/test/rails_band/active_storage/event/transform_test.rb
@@ -30,11 +30,6 @@ class TransformTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    post '/teams/transform', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     post '/teams/transform', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class TransformTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     post '/teams/transform', params: { team: { name: 'A', avatar: fixture_file_upload('test.png') } }
-    %i[name time end transaction_id children cpu_time idle_time allocations duration].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_support/event/cache_delete_multi_test.rb b/test/rails_band/active_support/event/cache_delete_multi_test.rb
index 77458ee2..81ffe8d0 100644
--- a/test/rails_band/active_support/event/cache_delete_multi_test.rb
+++ b/test/rails_band/active_support/event/cache_delete_multi_test.rb
@@ -31,11 +31,6 @@ class CacheDeleteMultiTest < ActionDispatch::IntegrationTest
       assert_instance_of String, @event.transaction_id
     end
 
-    test 'returns children' do
-      get '/users/123/cache3'
-      assert_instance_of Array, @event.children
-    end
-
     test 'returns cpu_time' do
       get '/users/123/cache3'
       assert_instance_of Float, @event.cpu_time
@@ -58,7 +53,7 @@ class CacheDeleteMultiTest < ActionDispatch::IntegrationTest
 
     test 'calls #to_h' do
       get '/users/123/cache3'
-      %i[name time end transaction_id children cpu_time idle_time allocations duration key].each do |key|
+      %i[name time end transaction_id cpu_time idle_time allocations duration key].each do |key|
         assert_includes @event.to_h, key
       end
     end
diff --git a/test/rails_band/active_support/event/cache_delete_test.rb b/test/rails_band/active_support/event/cache_delete_test.rb
index 69727702..85625e9d 100644
--- a/test/rails_band/active_support/event/cache_delete_test.rb
+++ b/test/rails_band/active_support/event/cache_delete_test.rb
@@ -30,11 +30,6 @@ class CacheDeleteTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users/123/cache2'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users/123/cache2'
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class CacheDeleteTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users/123/cache2'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_support/event/cache_exist_test.rb b/test/rails_band/active_support/event/cache_exist_test.rb
index 043b65ee..57e206c0 100644
--- a/test/rails_band/active_support/event/cache_exist_test.rb
+++ b/test/rails_band/active_support/event/cache_exist_test.rb
@@ -30,11 +30,6 @@ class CacheExistTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users/123/cache2'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users/123/cache2'
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class CacheExistTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users/123/cache2'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_support/event/cache_fetch_hit_test.rb b/test/rails_band/active_support/event/cache_fetch_hit_test.rb
index 0986e9d6..a0e4c1ed 100644
--- a/test/rails_band/active_support/event/cache_fetch_hit_test.rb
+++ b/test/rails_band/active_support/event/cache_fetch_hit_test.rb
@@ -30,11 +30,6 @@ class CacheFetchHitTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users/123/cache2'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users/123/cache2'
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class CacheFetchHitTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users/123/cache2'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_support/event/cache_generate_test.rb b/test/rails_band/active_support/event/cache_generate_test.rb
index f37139df..20f6069d 100644
--- a/test/rails_band/active_support/event/cache_generate_test.rb
+++ b/test/rails_band/active_support/event/cache_generate_test.rb
@@ -31,11 +31,6 @@ class CacheGenerateTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get "/users/#{@user.id}/cache"
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get "/users/#{@user.id}/cache"
     assert_instance_of Float, @event.cpu_time
@@ -58,7 +53,7 @@ class CacheGenerateTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get "/users/#{@user.id}/cache"
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_support/event/cache_read_multi_test.rb b/test/rails_band/active_support/event/cache_read_multi_test.rb
index 93b3a247..750382de 100644
--- a/test/rails_band/active_support/event/cache_read_multi_test.rb
+++ b/test/rails_band/active_support/event/cache_read_multi_test.rb
@@ -30,11 +30,6 @@ class CacheReadMultiTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users/123/cache2'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users/123/cache2'
     assert_instance_of Float, @event.cpu_time
@@ -57,8 +52,7 @@ class CacheReadMultiTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users/123/cache2'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key hits
-       super_operation].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key hits super_operation].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_support/event/cache_read_test.rb b/test/rails_band/active_support/event/cache_read_test.rb
index 6d655b9e..87d261e0 100644
--- a/test/rails_band/active_support/event/cache_read_test.rb
+++ b/test/rails_band/active_support/event/cache_read_test.rb
@@ -31,11 +31,6 @@ class CacheReadTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get "/users/#{@user.id}/cache"
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get "/users/#{@user.id}/cache"
     assert_instance_of Float, @event.cpu_time
@@ -58,8 +53,7 @@ class CacheReadTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get "/users/#{@user.id}/cache"
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key hit
-       super_operation].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key hit super_operation].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_support/event/cache_write_multi_test.rb b/test/rails_band/active_support/event/cache_write_multi_test.rb
index 0ef4bc87..2660b319 100644
--- a/test/rails_band/active_support/event/cache_write_multi_test.rb
+++ b/test/rails_band/active_support/event/cache_write_multi_test.rb
@@ -30,11 +30,6 @@ class CacheWriteMultiTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users/123/cache3'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users/123/cache3'
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class CacheWriteMultiTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users/123/cache3'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key].each do |key|
       assert_includes @event.to_h, key
     end
   end
diff --git a/test/rails_band/active_support/event/cache_write_test.rb b/test/rails_band/active_support/event/cache_write_test.rb
index b16b53a4..2dc86e2b 100644
--- a/test/rails_band/active_support/event/cache_write_test.rb
+++ b/test/rails_band/active_support/event/cache_write_test.rb
@@ -30,11 +30,6 @@ class CacheWriteTest < ActionDispatch::IntegrationTest
     assert_instance_of String, @event.transaction_id
   end
 
-  test 'returns children' do
-    get '/users/123/cache2'
-    assert_instance_of Array, @event.children
-  end
-
   test 'returns cpu_time' do
     get '/users/123/cache2'
     assert_instance_of Float, @event.cpu_time
@@ -57,7 +52,7 @@ class CacheWriteTest < ActionDispatch::IntegrationTest
 
   test 'calls #to_h' do
     get '/users/123/cache2'
-    %i[name time end transaction_id children cpu_time idle_time allocations duration key].each do |key|
+    %i[name time end transaction_id cpu_time idle_time allocations duration key].each do |key|
       assert_includes @event.to_h, key
     end
   end