diff --git a/app/models/event.rb b/app/models/event.rb
index 0992eac..3d8d28a 100644
--- a/app/models/event.rb
+++ b/app/models/event.rb
@@ -11,15 +11,28 @@ class Event < ActiveRecord::Base
 
   belongs_to :event_type
 
+  validates :conference, presence: true
   validates :title, presence: true
   validates :length, presence: true, numericality: {only_integer: true, greater_than: 0}
   validates :abstract, presence: true
   validates :description, presence: true
   validates :agreement, acceptance: true
+  validates :track, presence: true
+  validate :track_belongs_to_the_selected_conference
+  validates :language, inclusion: {in: I18n.available_locales.map(&:to_s)}, presence: true
+
 
   scope :confirmed, -> { where.not confirmed_at: nil }
 
   def proposer_profile
     proposer.personal_profile(conference)
   end
+
+  private
+
+  def track_belongs_to_the_selected_conference
+    unless conference.present? and conference.tracks.include?(track)
+      errors.add :track, :must_be_a_valid_track
+    end
+  end
 end
diff --git a/config/locales/bg.yml b/config/locales/bg.yml
index 13dfe4a..d47dcf1 100644
--- a/config/locales/bg.yml
+++ b/config/locales/bg.yml
@@ -136,7 +136,7 @@ bg:
         abstract: Резюме
         description: Описание
         notes: Забележки
-        track_id: Поток от лекции
+        track: Поток от лекции
         agreement: Съгласен(на) съм
         user: Лектор
       event_type:
@@ -144,6 +144,10 @@ bg:
         description: Описание
     errors:
       models:
+        event:
+          attributes:
+            track:
+              must_be_a_valid_track: трябва да е някой от изброените потоци от лекции
         user:
           attributes:
             email:
diff --git a/lib/open_fest/app/controllers/open_fest/events_controller.rb b/lib/open_fest/app/controllers/open_fest/events_controller.rb
index 1e77dfb..e8741ad 100644
--- a/lib/open_fest/app/controllers/open_fest/events_controller.rb
+++ b/lib/open_fest/app/controllers/open_fest/events_controller.rb
@@ -2,20 +2,23 @@ require_dependency "open_fest/application_controller"
 
 module OpenFest
   class EventsController < ApplicationController
+    before_filter :authenticate_user!
+
     def index
     end
 
     def new
-      @event_type = current_conference.event_types.find(params[:type])
-      @event = Event.new(event_type: @event_type)
+      event_type = current_conference.event_types.find(params[:type])
+      @event = Event.new event_type: event_type
     end
 
     def create
-      @event = Event.new(event_params)
+      @event = Event.new event_params
+      @event.conference = current_conference
+      @event.build_proposition proposer: current_user
+      @event.participations.build participant: current_user, approved: true
 
       if @event.save
-        # TODO (2015-08-10) Flash message?
-        flash[:notice] = 'Event was successfully created.'
         redirect_to action: :index
       else
         render action: :new
@@ -26,7 +29,7 @@ module OpenFest
 
     def event_params
       params.require(:event).permit(
-        :title, :subtitle, :length, :language,
+        :title, :subtitle, :track_id, :length, :language,
         :abstract, :description, :notes, :agreement,
         :event_type_id
       )
diff --git a/lib/open_fest/app/views/open_fest/events/new.slim b/lib/open_fest/app/views/open_fest/events/new.slim
index 4d9638a..bcd8909 100644
--- a/lib/open_fest/app/views/open_fest/events/new.slim
+++ b/lib/open_fest/app/views/open_fest/events/new.slim
@@ -1,22 +1,20 @@
 = simple_form_for @event, wrapper: :default do |form|
+  = form.input :event_type_id, as: :hidden, wrapper: false
+
+  h2= t('submit_event', event_type: @event.event_type.name)
+
   p
     = form.error_notification
 
-  h2= t('submit_event', event_type: @event_type.name)
-
   .form-inputs
-    = form.input :event_type_id, as: :hidden
-
     = form.input :title, autofocus: true
     = form.input :subtitle
-
-    -# TODO tracks -> indirectly through proposition?
-    -# form.input :track_id, collection: current_conference.tracks.map { |track| [track.name, track.id, {title: track.description}] }, required: true
+    = form.association :track, wrapper: :default, collection: current_conference.tracks
 
     -# TODO length is different for different types of events (translation problem)
     = form.input :length
 
-    = form.input :language, collection: I18n.available_locales, include_blank: false, default: I18n.locale
+    = form.input :language, as: :radio_buttons, collection: I18n.available_locales, include_blank: false, default: I18n.locale, wrapper: :default
     = form.input :abstract
     = form.input :description
     = form.input :notes
diff --git a/lib/open_fest/config/locales/simple_form.bg.yml b/lib/open_fest/config/locales/simple_form.bg.yml
index 9c04343..2ddc9e7 100644
--- a/lib/open_fest/config/locales/simple_form.bg.yml
+++ b/lib/open_fest/config/locales/simple_form.bg.yml
@@ -23,7 +23,7 @@ bg:
       event:
         title: Заглавието на събитието Ви
         subtitle: Подзаглавието на събитието Ви (ако има такова)
-        track_id: Потокът от лекции, в който искате да попадне събитието Ви
+        track: Потокът от лекции, в който искате да попадне събитието Ви
         length: Продължителността на събитието може да бъде от 40 до 45 минути
         language: Език, на който ще бъде водено събитието
         abstract: Резюме на събитието, което да може да бъде прочетено от посетителите (1 абзац)