snippet.rb

class Post < ActiveRecord::Base
    require 'RedCloth'  
  has_many :photos
  liquid_methods :post, :photo, :photos, :posts #Testing everything

#Works, but I want to be able to call it dynamicly in a textarea.
#SO I can use textile !{% picture 2 %}.
def pic(pos)
  photos[pos.to_i].image.url(:medium)
end

#I want to pass in { photo 1 } to the render. Where 1 is an integer
#Look at def render. @photo is that integer. However I get an error
#Liquid error: undefined local variable or method `photos’ for #
class PhotoPicker < Liquid::Tag                                            
    def initialize(tag_name, photo_pos, tokens)
       super 
       @photo = photo_pos.to_i
    end

    def render(context)
      photos[@photo].image.url(:medium)
      #rand(@photo)
    end
end 

#Works Just type {% rando 6 %} and it pulls a rand(6)
#Calling in View <%= textilize(Liquid::Template.parse(post.content).render) %>
class Rando < Liquid::Tag                                            
    def initialize(tag_name, photo_pos, tokens)
       super 
       @photo = photo_pos.to_i
    end

    def render(context)
      #photos[@photo].image.url(:medium)
      rand(@photo)
    end
end
Liquid::Template.register_tag('rando', Rando)
  Liquid::Template.register_tag('picture', PhotoPicker) 
end