module KeepDefaults

# File lib/keep_defaults.rb, line 4
def self.included(klass)
  klass.instance_eval do
    column_defaults.each do |name, default|
      next if default.nil? || columns_hash[name].null

      # Use Module.new so classes can get this by calling super
      module_eval %{
        include Module.new {
          def #{name}=(value)
            return if value.nil?
            super value
          end
        }
      }, __FILE__, __LINE__ + 1
    end
  end
end

# File lib/keep_defaults.rb, line 22
def write_attribute(name, value)
  name  = name.to_s if name.is_a?(Symbol)
  name  = self.class.attribute_alias(name) if self.class.attribute_alias?(name)
  value = self.class.column_defaults[name] if value.nil? && !self.class.columns_hash[name].null
  super
end