diff --git a/app/models/conference.rb b/app/models/conference.rb
index 6ec49ee..16bc384 100644
--- a/app/models/conference.rb
+++ b/app/models/conference.rb
@@ -10,6 +10,8 @@ class Conference < ActiveRecord::Base
 
   has_many :tracks
   has_many :halls
+  has_many :events, through: :tracks
+
 
   accepts_nested_attributes_for :tracks, :halls, reject_if: :all_blank, allow_destroy: true
 
diff --git a/app/models/track.rb b/app/models/track.rb
index 7f5e7c2..3f4f010 100644
--- a/app/models/track.rb
+++ b/app/models/track.rb
@@ -1,5 +1,8 @@
 class Track < ActiveRecord::Base
+  include PropositionAccepting
+
   belongs_to :conference
+  has_many :events, through: :propositions, source: :proposable, source_type: Event
 
   validates :name, presence: true
   validates :color, presence: true, format: {with: /\A#?[a-f0-9]{6}\z/i}