Add difficulty levels

app/models/conference.rb

@@ -2,7 +2,7 @@ class Conference < ActiveRecord::Base
   attr_accessible :title, :short_title, :social_tag, :contact_email, :timezone, :html_export_path,
                   :start_date, :end_date, :rooms_attributes, :tracks_attributes, :dietary_choices_attributes,
                   :use_dietary_choices, :use_supporter_levels, :supporter_levels_attributes, :social_events_attributes,
-                  :event_types_attributes, :registration_start_date, :registration_end_date, :logo
+                  :event_types_attributes, :difficulty_levels_attributes, :use_difficulty_levels, :registration_start_date, :registration_end_date, :logo
 
   has_paper_trail
 
@@ -15,6 +15,7 @@ class Conference < ActiveRecord::Base
   has_many :events, :dependent => :destroy
   has_many :event_types, :dependent => :destroy
   has_many :tracks, :dependent => :destroy
+  has_many :difficulty_levels, :dependent => :destroy
   has_many :rooms, :dependent => :destroy
   has_many :registrations, :dependent => :destroy
 
@@ -22,6 +23,7 @@ class Conference < ActiveRecord::Base
 
   accepts_nested_attributes_for :rooms, :reject_if => proc {|r| r["name"].blank?}, :allow_destroy => true
   accepts_nested_attributes_for :tracks, :reject_if => proc {|r| r["name"].blank?}, :allow_destroy => true
+  accepts_nested_attributes_for :difficulty_levels, :allow_destroy => true
   accepts_nested_attributes_for :social_events, :allow_destroy => true
   accepts_nested_attributes_for :venue
   accepts_nested_attributes_for :dietary_choices, :allow_destroy => true
@@ -41,6 +43,7 @@ class Conference < ActiveRecord::Base
                         :social_tag
   validates_uniqueness_of :short_title
   validates_format_of :short_title, :with => /^[a-zA-Z0-9_-]*$/
+   
   before_create :generate_guid
   before_create :create_venue
   before_create :create_email_settings

app/models/difficulty_level.rb

@@ -0,0 +1,8 @@
+class DifficultyLevel < ActiveRecord::Base
+  attr_accessible :title, :description, :color
+  
+  belongs_to :conference
+  has_many :events
+
+  validates :title, :presence => true
+end

app/models/event.rb

@@ -1,8 +1,8 @@
 class Event < ActiveRecord::Base
   include ActiveRecord::Transitions
   has_paper_trail
-  attr_accessible :title, :subtitle, :abstract, :description, :event_type_id, :people_attributes, :person,
-                  :proposal_additional_speakers, :track_id, :video_id, :video_type, :require_registration
+  attr_accessible :title, :subtitle, :abstract, :description, :event_type_id, :people_attributes, :person, :proposal_additional_speakers, :track_id, :video_id, :video_type, :require_registration, :difficulty_level_id
+
   acts_as_commentable
 
   has_many :event_people, :dependent => :destroy
@@ -17,6 +17,7 @@ class Event < ActiveRecord::Base
 
   belongs_to :track
   belongs_to :room
+  belongs_to :difficulty_level
   belongs_to :conference
 
   accepts_nested_attributes_for :event_people, :allow_destroy => true
@@ -92,6 +93,7 @@ class Event < ActiveRecord::Base
       person
     end
   end
+
   def as_json(options)
     json = super(options)
 
@@ -106,6 +108,7 @@ class Event < ActiveRecord::Base
     else
       json[:track_color] = self.track.color;
     end
+
     if self.event_type.nil?
       json[:length] = 25
     else
@@ -114,6 +117,7 @@ class Event < ActiveRecord::Base
 
     json
   end
+
   def transition_possible?(transition)
     self.class.state_machine.events_for(self.current_state).include?(transition)
   end
@@ -125,6 +129,7 @@ class Event < ActiveRecord::Base
       end
     end
   end
+
   def process_acceptance(options)
     if options[:send_mail] == "true"
       Rails.logger.debug "Sending acceptance mail"
@@ -156,6 +161,7 @@ class Event < ActiveRecord::Base
     end
     public_state
   end
+
   def abstract_word_count
     if self.abstract.nil?
       0
@@ -163,6 +169,7 @@ class Event < ActiveRecord::Base
       self.abstract.split.size
     end
   end
+
   private
 
   def abstract_limit
@@ -184,6 +191,7 @@ class Event < ActiveRecord::Base
       errors.add(:person_biography, "must be filled out")
     end
   end
+
   def generate_guid
     begin
       guid = SecureRandom.urlsafe_base64