DEPRECATION WARNING on save with ruby and active_record

Question

I am new to ruby and writing a small script that requires writing messages to a database log.

I am using ruby 1.9.3 with active_record but without rails. All select statements work fine, but my write to log function is returning the following error:

DEPRECATION WARNING: You're trying to create an attribute `ID'. Writing arbitrary attributes on a model is deprecated. Please just use `attr_writer` etc.

my model looks like that

class ActLog < ActiveRecord::Base
  self.table_name = "ActLog"
  self.primary_key = "ID"
end

and my log function:

def log(level, message)
  level.upcase!
  line = ActLog.new
  line.level = level
  line.message = message
  line.module = 'script'
  line.date = Time.new.strftime("%Y-%m-%d %H:%M:%S")
  line.save
end

the ID field is an int auto_increment.

The log function will be called many times during the execution. Is that the best way to write to the log and why is the deprecation warning popping up?

Answer 1

I checked the API and the methods you're using are current. I think you may need attr_accessor

class ActLog < ActiveRecord::Base
  attr_accessor :id, :level, :message, :module, :date
  self.table_name = "ActLog"
  self.primary_key = "ID"
end

def log(level, message)
  attr = { :level   => level.upcase!,
           :message => message,
           :module  => 'script',
           :date    => Time.new.strftime("%Y-%m-%d %H:%M:%S") }
  ActLog.new(attr).save!
end

Answer 2

I think your class should be as follows:

class ActLog < ActiveRecord::Base
  self.primary_key = 'ID'
  self.table_name = 'ActLog'
end

Out of curiosity, why the non-standard names?