From feed7f209c57e53e61c4f988d00f368fe14152ac Mon Sep 17 00:00:00 2001
From: vangberg <harry@vangberg.name>
Date: Thu, 18 Jun 2026 10:20:37 +0200
Subject: [PATCH] Use semantic JSON logging in production

---
 Gemfile                           |  1 +
 Gemfile.lock                      |  7 +++++++
 config/application.rb             |  3 +++
 config/environments/production.rb | 14 ++++----------
 4 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/Gemfile b/Gemfile
index 33b7678b..6cc3e289 100644
--- a/Gemfile
+++ b/Gemfile
@@ -35,6 +35,7 @@ gem 'puma', '~> 5.6'
 gem 'rails', '~> 6.1'
 gem 'rack-attack'
 gem 'rack-cors'
+gem 'rails_semantic_logger', '~> 4.20'
 gem 'redcarpet', '~> 3.5'
 gem 'redirect_safely', '~> 1.0'
 gem 'rexml'
diff --git a/Gemfile.lock b/Gemfile.lock
index 6e982439..728495a1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -286,6 +286,10 @@ GEM
     rails-html-sanitizer (1.7.0)
       loofah (~> 2.25)
       nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
+    rails_semantic_logger (4.20.0)
+      rack
+      railties (>= 5.1)
+      semantic_logger (~> 4.16)
     railties (6.1.7.10)
       actionpack (= 6.1.7.10)
       activesupport (= 6.1.7.10)
@@ -382,6 +386,8 @@ GEM
       rexml (~> 3.2, >= 3.2.5)
       rubyzip (>= 1.2.2, < 4.0)
       websocket (~> 1.0)
+    semantic_logger (4.18.0)
+      concurrent-ruby (~> 1.0)
     semantic_range (3.1.1)
     serrano (1.7)
       faraday (~> 2.14, >= 2.14.1)
@@ -499,6 +505,7 @@ DEPENDENCIES
   rack-attack
   rack-cors
   rails (~> 6.1)
+  rails_semantic_logger (~> 4.20)
   rdoc
   redcarpet (~> 3.5)
   redirect_safely (~> 1.0)
diff --git a/config/application.rb b/config/application.rb
index d3bd5efb..d0f527ab 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -14,6 +14,9 @@ class Application < Rails::Application
     # Boolean handling of SQLite3
     config.active_record.sqlite3&.represent_boolean_as_integer = true
 
+    config.semantic_logger.application = 'seqcode-registry'
+    config.semantic_logger.environment = Rails.env
+
     # Settings in config/environments/* take precedence over those specified here.
     # Application configuration can go into files in config/initializers
     # -- all .rb files in that directory are automatically loaded after loading
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 07aa50a4..d15d322f 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -56,7 +56,7 @@
   config.log_level = :warn
 
   # Prepend all log lines with the following tags.
-  config.log_tags = [ :request_id ]
+  config.log_tags = { request_id: :request_id }
 
   # Use a different cache store in production.
   # config.cache_store = :mem_cache_store
@@ -91,17 +91,11 @@
   # Send deprecation notices to registered listeners.
   config.active_support.deprecation = :notify
 
-  # Use default logging formatter so that PID and timestamp are not suppressed.
-  config.log_formatter = ::Logger::Formatter.new
-
-  # Use a different logger for distributed setups.
-  # require 'syslog/logger'
-  # config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new 'app-name')
+  config.rails_semantic_logger.format = :json
 
   if ENV['RAILS_LOG_TO_STDOUT'].present?
-    logger           = ActiveSupport::Logger.new(STDOUT)
-    logger.formatter = config.log_formatter
-    config.logger    = ActiveSupport::TaggedLogging.new(logger)
+    config.rails_semantic_logger.add_file_appender = false
+    config.semantic_logger.add_appender(io: STDOUT, formatter: :json)
   end
 
   # Do not dump schema after migrations.