logging - Using logger in Rails 4 -

i'm working on rails 4 project, , can't seem make show in development log when call rails.logger.debug "test" i've tried searching online feel haven't made progress. how go setting logger , telling write in development log file?

any appreciated.

i think should use in method. checkout section 2.3 here

def your_method     logger.debug "this debug"   logger.info "this info" end