Rails: How to write to a custom log file from within a rake task in production mode?

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  1. Nelson

    • 2017/4/28

    The problem you are having is that rails ignores 'info' level logs in production mode.

    I'd recommend reading this: http://www.ruby-doc.org/stdlib/libdoc/logger/rdoc/classes/Logger.html

    and creating your own logger:

    logger = Logger.new('logfile.log')
    logger.info "Something happened"
    
  2. Daniel

    • 2020/2/19

    2.2 Log Levels​​ level method. This is useful when you want to log under development or staging, but you don't want to flood your production log with unnecessary information. The default Rails log level is info in production mode and debug in development and test mode.

  3. Wyatt

    • 2016/1/2

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  4. Jericho

    • 2015/10/2

    If you've worked on Rails, you would've noticed that the default Rails logs are No clear way to parse the logs as the logs format is not standard (if you don't But remember, Lograge cannot be used for the custom logger 

  5. Travis

    • 2017/4/5

    Maybe you need to write out the buffer where you need it:

    logger.flush
    

    or you can turn on auto flushing:

    task :foo => :environment do
      Rails.logger.auto_flushing = 1
      Rails.logger.info "bar"
    end
    
  6. Bodie

    • 2016/4/29

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  7. Ferraro

    • 2017/7/31

    You are missing the second step. Normally this is done in the Rakefile, but you have to do it manually here: require 'rake' Rails.

  8. Damian

    • 2020/6/14

    Rails.logger = Logger.new(STDOUT)

  9. Jasiah

    • 2015/10/3

    You can make a new logger with Logger.new("file.log") and then call it's methods like this.

      task :import_stuff => :environment do
        require 'csv'
        l = Logger.new("stuff.log")
        csv_file = "#{RAILS_ROOT}/stuff.csv"
        CSV.open(csv_file, 'r') do |row|
          l.info row[1]
         end
      end
    
  10. Bertrand

    • 2015/2/23

    Logger has the following features: Print messages to different levels such as info and error; Auto-rolling of log files; Setting the format of log messages 

  11. Nicolas

    • 2018/9/7

    Rails maintains a separate log file for each runtime environment. 2.1 What is the Logger? Rails makes use of the ActiveSupport::Logger class to write log information. Other loggers, such as Log4r, may also be substituted. You can specify an alternative logger in config/application.rb or any other environment file, for example:

  12. Rocco

    • 2021/2/4

    A rake task is an automated set of instructions you can ask the console to perform by calling the rake command and the name of the task. Rake 

  13. Palmieri

    • 2018/2/1

    Rake Rake is Ruby Make, a standalone Ruby utility that replaces the Unix utility ‘make’, and uses a ‘Rakefile’ and.rake files to build up a list of tasks. In Rails, Rake is used for common administration tasks, especially sophisticated ones that build off of each other.

  14. Jesiah

    • 2020/1/22

    And the log format has changed. Based on the sprockets-rails issue#376, I realised that Ruby's ::Logger is deprecated in Rails 5 in favor of 

  15. Dylan

    • 2019/9/12

    When building an application, using a Rails logger or similar gem puts you on the path to proper application logging. To handle logs in a running application, the Rails logger provides additional

  16. Johan

    • 2016/7/17

    I think you should use it like this in your method. Checkout section 2.3 here def your_method logger.debug "This is from debug" logger.info 

  17. Royal

    • 2017/9/20

    Rails Logger Another option is the Rails Logger, (a.k.a. the Ruby Logger). Go to your config/application.rb file—or any environment.rb file—or in the Initializer section and add the following:

  18. Kelmendi

    • 2015/3/28

    When building an application, using a Rails logger or similar gem puts you on the path to proper application logging. To handle logs in a 

  19. Carter

    • 2020/1/26

    When building an application, using a Rails logger or similar gem puts you on the path to proper application logging. To handle logs in a running application, the Rails logger provides additional

  20. Gerardo

    • 2016/8/12

    Rails Logger. Rails creates an instance of ActiveSupport::Logger as part of initialization and uses it for logging to standard output. Take a look at 

  21. Jaxxon

    • 2021/2/7

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  22. Caden

    • 2015/8/13

    www.jetbrains.com › help › ruby › rake

  23. Castillo

    • 2018/8/25

    Best Practices It’s very common for the only logging in an application to be Error logs from within try/catch blocks. While this is a good thing to do, if that’s all you’re doing, then you’re going to have very limited visibility into the execution of your application once it leaves your local development environment.

  24. Jesse

    • 2020/11/2

    If you aren't sure how to run a rake task, first find out first what tasks you have and it will also list the commands to run the tasks. Run rake --tasks on the terminal. You can then run your task with: rake gobble:dev:prime as listed.

  25. Green

    • 2021/3/21

    By using the rails_stdout_logging gem with Heroku, we set the logger for you. The gem rails_stdout_logging ensures that your logs will be sent to standard out. From there, Heroku sends them to logplex so you can access them from the command line like $ heroku logs --tail, or from enabled addons like papertrail.

  26. Jensen

    • 2021/5/10

    This simple guide explains where Ruby logs are located, how to configure logging, can be found: inline with program execution, and in a designated log file. It is important to note that, while the Ruby on Rails Logger is an extension of the 

  27. Jaxx

    • 2015/5/15

    Copy-paste code from another ready rake task and change code to required But there is a 3rd way to do it. Just use this rake generator: $ rails g task my_namespace my_task1 my_task2 $ create lib/tasks/my_namespace.rake

  28. Serra

    • 2015/6/5

    Rails has you covered. It defaults to INFO in production and DEBUG in testing and development. Logging Format. After setting the logging level, 

  29. Kenzo

    • 2019/10/3

    config.log_level = :warn # In any environment initializer, or Rails.logger.level = 0 # at any time This is useful when you want to log under development or staging without flooding your production log with unnecessary information. The default Rails log level is debug in all environments. 2.3 Sending Messages

  30. Thompson

    • 2017/7/29

    www.rubyguides.com › 2019/02 › ruby-rake

  31. Dillon

    • 2020/8/4

    Custom rake tasks have a .rake extension and are placed in Rails.root/lib/tasks. You can create these custom rake tasks with the bin/rails generate task command. desc "I am short, but comprehensive description for my cool task" task task_name: [ :prerequisite_task , :another_task_we_depend_on ] do # All your magic here # Any valid Ruby code is allowed end

  32. Mason

    • 2017/4/16

    logger = Logging::GeneralLogger.new and my logs are formatted as desired. What am I doing wrong with setting log_formatter ? I'd rather not 

  33. John

    • 2015/5/17

    Twin Creeks Log Home Supply is the leading provider of lumber, stains, sealants and other products for building, updating, and maintaining log homes. From custom milled beams to the most enduring wood protectants in the industry, Twin Creeks Log Home Supply can help you keep your log home in beautiful, long-lasting beauty. Read More

  34. Dervishi

    • 2015/8/15

    Rake tasks typically consist of three parts: the task name, the block that the task executes, and the description. The task name declares the name 

  35. Durand

    • 2015/6/12

    Similar to xnm's and house9's answer: Try RAILS_ENV=production rake my_task_name. It won't change your environment permanently, only for the task, so don't worry.– mjnissimAug 29 '12 at 8:17. Please change the title, as this has nothing to do with rake– Taylored Web SitesDec 27 '18 at 23:11. Add a comment |.

  36. Kylian

    • 2018/3/9

    To run a task with environment variables, specify the values of the variables in the form [variable=value] before the task name: rake RAILS_ENV=production 

  37. Harlem

    • 2018/4/6

    Running your Rake tasks requires two steps: I am using rails 5.x.x, and was in the need the do the same form rails console. I have create rake task here-

  38. Khalil

    • 2020/1/15

    Debugging Rails ApplicationsThis guide introduces techniques for are only really noticeable with large amounts of logging, but it's a good practice to employ.

  39. Bryce

    • 2021/4/5

    If you just need the logger output for a specific test, put config.logger = Logger.new(STDOUT) at the beginning of the test. This works at least for MiniTest on Rails 5.0.1. This works at least for MiniTest on Rails 5.0.1.

  40. Ian

    • 2017/10/10

    You can put this code inside a file named Rakefile , or if you're using Rails, you can save this under lib/tasks/apple.rake . To run this task: rake apple. # "Eat more​ 

  41. Garrett

    • 2020/4/14

    This is how it works: task :say_hello do # ARGV contains the name of the rake task and all of the arguments. # Remove/shift the first element, i.e. the task name. ARGV.shift # Use the arguments puts 'Hello arguments:', ARGV # By default, rake considers each 'argument' to be the name of an actual task.

  42. Jameson

    • 2017/3/29

    In a Rails app, logs are stored under the /log folder. In development mode, the development.log file is used & you see log output on the terminal 

  43. D'Agostino

    • 2016/7/29

    All dependent rake tasks get the options. The syntax is a lot simpler, not depending on the rake DSL which is hard to figure out and changes over time. I have a rake task which requires three command-line options. Here's how I invoke it: $ rake eaternet:import country=us region=or agency=multco

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