Using helpers in model: how do I include helper dependencies?

Question

I\'m writing a model that handles user input from a text area. Following the advice from http://blog.caboo.se/articles/2008/8/25/sanitize-your-users-html-input, I\'m cleani

Answer 1

This works better for me:

Simple:

ApplicationController.helpers.my_helper_method

Advance:

class HelperProxy < ActionView::Base
  include ApplicationController.master_helper_module

  def current_user
    #let helpers act like we're a guest
    nil
  end       

  def self.instance
    @instance ||= new
  end
end

Source: http://makandracards.com/makandra/1307-how-to-use-helper-methods-inside-a-model

Answer 2

To access helpers from your own controllers, just use:

OrdersController.helpers.order_number(@order)

Answer 3

Just change the first line as follows :

include ActionView::Helpers

that will make it works.

UPDATE: For Rails 3 use:

ActionController::Base.helpers.sanitize(str)

Credit goes to lornc's answer

Answer 4

I wouldn't recommend any of these methods. Instead, put it within its own namespace.

class Post < ActiveRecord::Base
  def clean_input
    self.input = Helpers.sanitize(self.input, :tags => %w(b i u))
  end

  module Helpers
    extend ActionView::Helpers::SanitizeHelper
  end
end

Answer 5

If you want to use a the my_helper_method inside a model, you can write:

ApplicationController.helpers.my_helper_method

Answer 6

This gives you just the helper method without the side effects of loading every ActionView::Helpers method into your model:

ActionController::Base.helpers.sanitize(str)