Horrible form hack getting all attr_accessible from model

form_hack.rb

module FormHelper
  def errors_for model, field
    if model.errors[field].present?
      content_tag :span, :class => 'error_explanation' do
        model.errors[field].join(", ")
      end
    end
  end

  def text_fields_for f, model
    #Get the attr_accessible keys from the model
    values = model.class.attr_accessible.first[1].to_a.map { |k,v| k }

    #Generate a string with html to display in the view
    raw(values.inject('') do |sum, el|
      sum += f.label el
      errors = errors_for model, el.to_sym 
      unless errors.nil?
        sum += errors 
        sum += f.text_field el.to_s, value: model.send(el)
      end
      sum
    end)
  end
end