error

ArgumentError: comparison of Fixnum with nil failed

=== COMPILATION STACK:

  (empty)

=== BACKTRACE:

  0. lib/helpers/resources.rb:45:in `sort_by'
  1. lib/helpers/resources.rb:45:in `listings'
  2. lib/helpers/resources.rb:64:in `new_listing'
  3. layout /blog/:33:in `get_binding'
  4. /Users/Jacob/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/erb.rb:753:in `eval'
  5. /Users/Jacob/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/erb.rb:753:in `result'
  6. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/filters/erb.rb:31:in `run'
  7. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/helpers/rendering.rb:99:in `render'
  8. layout /default/:50:in `get_binding'
  9. /Users/Jacob/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/erb.rb:753:in `eval'
  10. /Users/Jacob/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/erb.rb:753:in `result'
  11. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/filters/erb.rb:31:in `run'
  12. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/base/result_data/item_rep.rb:400:in `layout'
  13. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/base/compilation/item_rep_proxy.rb:68:in `layout'
  14. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/base/compilation/rule_context.rb:67:in `layout'
  15. ./Rules:109:in `block in load'
  16. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/base/compilation/rule.rb:68:in `instance_eval'
  17. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/base/compilation/rule.rb:68:in `apply_to'
  18. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/base/compilation/compiler.rb:377:in `compile_rep'
  19. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/base/compilation/compiler.rb:333:in `block in compile_reps'
  20. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/base/compilation/compiler.rb:326:in `loop'
  21. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/base/compilation/compiler.rb:326:in `compile_reps'
  22. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/base/compilation/compiler.rb:85:in `run'
  23. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/base/source_data/site.rb:57:in `compile'
  24. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/cli/commands/compile.rb:61:in `run'
  25. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/cli/command.rb:51:in `block in call'
  26. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/cli/error_handler.rb:40:in `handle_while'
  27. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/cli/error_handler.rb:21:in `handle_while'
  28. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/cli/command.rb:50:in `call'
  29. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/cli/command.rb:43:in `call'
  30. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/cli/commands/compile.rb:24:in `block in define'
  31. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/cri-2.0.2/lib/cri/command.rb:255:in `call'
  32. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/cri-2.0.2/lib/cri/command.rb:255:in `run'
  33. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/cri-2.0.2/lib/cri/command.rb:272:in `run'
  34. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/cli.rb:40:in `block in run'
  35. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/cli/error_handler.rb:40:in `handle_while'
  36. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/cli/error_handler.rb:21:in `handle_while'
  37. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/lib/nanoc3/cli.rb:37:in `run'
  38. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/gems/nanoc3-3.2.0b3/bin/nanoc3:12:in `<top (required)>'
  39. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/bin/nanoc3:19:in `load'
  40. /Users/Jacob/.rvm/gems/ruby-1.9.2-p290/bin/nanoc3:19:in `<main>'

If you believe this is a bug in nanoc, please do report it at
<https://github.com/ddfreyne/nanoc/issues/new>--thanks!

resources.rb

module Nanoc3::Helpers
  
  module Resources
   
    # used in layouts, allows for listing.address and home.features, etc
    def listing
      Resource.new(item)
    end
    
    def home
      Resource.new(item)
    end
    
    def land
      Resource.new(item)
    end
    
    def commercial
      Resource.new(item)
    end
    
    def neighborhood
      Resource.new(item)
    end
    
    def article
      Resource.new(item)
    end
    
    # grabs all listing item and provides options for filtering 
    # homes and land as well as ordering by date or price
    def listings options={}
      items = @items.select { |item| item[:kind] == 'listing' }
      items = items.select do |item| 
      
        if options[:type] 
          item[:type] == options[:type]
        elsif options[:neighborhood]
          item[:neighborhood] == options[:neighborhood]
        else
          item[:kind] == 'listing'
        end
      end
      
      items.map { |item| Resource.new(item) }.sort_by { |item| item.price }.reverse
    end
    
    def sorted_listings
      listings = @items.select { |item| item[:kind] == 'listing' }.map { |item| Resource.new(item) }
      
      listings.sort_by do |l|
        time = l.created_at
        time.is_a?(String) ? Time.parse(time) : time
      end.reverse          
    end
    
    def featured_listing
      featured_listing = @items.find { |i| i[:featured] }
      
      Resource.new(featured_listing)
    end
    
    def new_listing address
      listings(:type => 'home').find { |l| l.address == address }
    end
    
    # finds the next home in the array of home items
    # loops back to the beginning
    def next_home home
      homes = listings(:type => 'home')
      index = homes.index(homes.find { |h| h.address == home.address })
      
      if homes[index + 1] == nil
        homes[0]
      else
        homes[index + 1]
      end
    end
    
    # find the previous home
    # loops by default
    def prev_home home
      homes = listings(:type => 'home')
      index = homes.index(homes.find { |h| h.address == home.address })
      
      homes[index - 1]
    end
    
    # finds the next land in the array of land items
    # loops back to the beginning
    def next_land land
      lands = listings(:type => 'land')
      index = lands.index(lands.find { |h| h.address == land.address })
      
      if lands[index + 1] == nil
        lands[0]
      else
        lands[index + 1]
      end
    end
    
    # find the previous land
    # loops by default
    def prev_land land
      lands = listings(:type => 'land')
      index = lands.index(lands.find { |h| h.address == land.address })
      
      lands[index - 1]
    end
    
    # finds the next commercial property in the array of commercial items
    # loops back to the beginning
    def next_commercial commercial
      commercials = listings(:type => 'commercial')
      index = commercials.index(commercials.find { |c| c.address == commercial.address })
      
      if commercials[index + 1] == nil
        commercials[0]
      else
        commercials[index + 1]
      end
    end
    
    # find the previous commercial property
    # loops by default
    def prev_commercial commercial
      commercials = listings(:type => 'commercial')
      index = commercials.index(commercials.find { |h| h.address == commercial.address })
      
      commercials[index - 1]
    end
    
    # grab all of the neighborhoods and create an array of
    # Nieghborhood class instances (ordered by the number
    # in the file name)
    def neighborhoods
      @items.select { |item| item[:kind] == 'neighborhood' }.
                map { |item| Resource.new(item) }
    end
    
    def categories
      Dir['content/blog/*'].
        reject { |f| f.match /(html|xml)/ }.
        map    { |f| f.gsub('content/blog/','') }.
        map    { |f| titleize(f) }
    end
    
    # used on blog main page
    def first_paragraph article
      if article[:address]
        # first paragraph for new listing articles is the first 
        # paragraph of the description of the address
        new_listing(article[:address]).description.split('. ').first + '.'
      else
        doc = Nokogiri::HTML(article.compiled_content(:snapshot => :pre))
        first_paragraph = doc.css('p')[0]
        first_paragraph.content = "#{first_paragraph.content} <a href=\"#{article.path}\">Continue reading &hellip;</a>"
      
        first_paragraph.content
      end
    end
  end
end