问题
From the Rails Guide on debugging, I found that I can customize output to my log files using this simple method:
logger.debug "Person attributes hash: #{@person.attributes.inspect}"
I decided use this to track how a variable changes and goes through flow control.
I would like to be able to see the line number of my code where logger#debug
method was called. Something like this:
logger.debug "Person attributes hash: #{@person.attributes.inspect} from line #{LINE_NUMBER_VAR}"
回答1:
logger.debug "Person attributes hash: #{@person.attributes.inspect} from line #{__LINE__}"
回答2:
Use a decorator on Logger:
class LoggerDecorator
def initialize(logger)
@logger = logger
end
%w{debug info warn error fatal}.each do |method|
eval(<<-eomethod)
def #{method}(msg)
@logger.#{method}(position) {msg}
end
eomethod
end
private
def position
caller.at(1).sub(%r{.*/},'').sub(%r{:in\s.*},'')
end
end
回答3:
As of Rails 5, this is now baked in via:
ActiveRecord::Base.verbose_query_logs = true
See the documentation for more
来源:https://stackoverflow.com/questions/2268679/output-line-number-in-rails-log-file