Tracing Rails 3 SQL queries
A port of query_trace to rails3
https://gist.github.com/1137342
QueryTrace doesn't work as-is because many changes were made in Rails 3 esp in the area of ActiveRecord.
So, hacking around, I made it work like this:
You just need the 2 files below in the locations mentioned. Then restart the web server.
After the SQL, you should see Called from:
in a console (magenta on white) and log file
In /vendor/plugins/query_trace/lib/query_trace.rb
module QueryTrace
def self.append_features(klass)
super
klass.class_eval do
unless method_defined?(:log_info_without_trace)
alias_method :log_info_without_trace, :sql
alias_method :sql, :log_info_with_trace
end
end
end
def log_info_with_trace(event)
log_info_without_trace(event)
logger.debug("\e[1m\e[35m\e[1m\e[47mCalled from:\e[0m " + clean_trace(caller[2..-2]).join("\n "))
end
def clean_trace(trace)
Rails.respond_to?(:backtrace_cleaner) ?
Rails.backtrace_cleaner.clean(trace) :
trace
end
end
In /vendor/plugins/query_trace/init.rb
require 'query_trace'
class ::ActiveRecord::LogSubscriber
include QueryTrace
end
https://github.com/lightyear/sql-logging
The active_record_query_trace also does that.
- Add the following to your Gemfile:
group :development do
gem 'active_record_query_trace'
end
- Create an initializer such as
config/initializers/active_record_query_trace.rb
to enable the gem. If you want to customize how the gem behaves, you can add any combination of the options described in the docs to the initializer as well.
if Rails.env.development?
ActiveRecordQueryTrace.enabled = true
# Optional: other gem config options go here
end
- Restart the Rails development server.