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Error Handling

掌握錯誤

可能出錯的地方 log 且導向相關 user 或統計工具

Bad:

require 'logger'

logger = Logger.new(STDOUT)

begin
  function_that_might_throw()
rescue StandardError => err
  logger.info(err)
end

Good:

require 'logger'

logger = Logger.new(STDOUT)
# Change the logger level to ERROR to output only logs with ERROR level and above
logger.level = Logger::ERROR

begin
  function_that_might_throw()
rescue StandardError => err
  # Option 1: Only log errors
  logger.error(err)
  # Option 2: Notify end-user via an interface
  notify_user_of_error(err)
  # Option 3: Report error to a third-party service like Honeybadger
  report_error_to_service(err)
  # OR do all three!
end

說明錯誤

Bad:

def initialize(user)
  fail unless user
  ...
end

Good:

def initialize(user)
  fail ArgumentError, 'Missing user' unless user
  ...
end