Boolean type in Rails & Mysql

MySQL BOOLEAN data type, which is the synonym of TINYINT(1), value range [-128..127]

Confused situation
id (integer) name (string) status (boolean)
1 Aoi 1
2 Maria 10 


# Rails 4
Idol.find(2).status
=> false

# Rails 5
Idol.find(2).status
=> true
Explanation

Rails 4 boolean.rb

def cast_value(value)
  if value == ''
    nil
  elsif TRUE_VALUES.include?(value)
    true
  else
    # [...]
    false
  end
end

Rails 5 boolean.rb

def cast_value(value)
  if value == ""
    nil
  else
    !FALSE_VALUES.include?(value)
  end
end