Module: StatusAccessor

Defined in:
lib/status_accessor.rb

Instance Method Summary collapse

Instance Method Details

#status_accessor(*args) ⇒ Object 



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# File 'lib/status_accessor.rb', line 3

def status_accessor(*args)

  options = args.last.is_a?(Hash) ? args.pop : {}

  # if the second argument is an array, assume the first is an alternative field name
  if args[1].is_a?(Array)
    field_name, statuses = args

  # otherwise, assume all the agruments are statuses and default to field name 'status'
  else
    field_name = :status
    statuses = args
  end

  statuses.each do |s|
    state = options[:transform] ? s.to_s.send(options[:transform]) : s.to_s.upcase
    define_method("#{s.to_s.downcase}!") do
      self.send("#{field_name}=", state)
    end
    define_method("#{s.to_s.downcase}?") do
      self.send(field_name) == state
    end
    define_method("update_to_#{s.to_s.downcase}!") do
      self.update_attribute(field_name, state)
    end

    # in case we want to use this outside the context of ActiveRecord
    if self.respond_to?(:named_scope) # rails 2
      named_scope s.to_s.downcase.to_sym, :conditions => {:"#{field_name}" => state}
    elsif self.respond_to?(:scope) # rails 3
      scope s.to_s.downcase.to_sym, :conditions => {:"#{field_name}" => state}
    end

  end

  class_variable_set "@@#{field_name}_strings", statuses.collect {|s| s.to_s.upcase}

  (class << self; self; end).send(:define_method, "#{field_name}_strings") do
    class_variable_get "@@#{field_name}_strings"
  end

end