Include models without associations

script/sequel-model-graph.rb

@@ -11,8 +11,10 @@ Dir.glob('./app/models/**/*.rb').each {|file| require file }
 # List Sequel through reflection
 Sequel::Model.subclasses.each do |model|
   # Get its associations
-  model.association_reflections.values.each do |assoc|
+  associations = model.association_reflections.values
+  associations.each do |assoc|
     # Graphviz dot output
     puts "#{model.to_s.demodulize} -> #{assoc.associated_class.to_s} [ label=\"#{assoc[:type].to_s}\" ];"
   end
+  puts "#{model.to_s.demodulize} -> {}" if associations.empty?
 end