Reimplement speaker listing

app/controllers/api/speakers_controller.rb

@@ -3,6 +3,6 @@ class Api::SpeakersController < Api::ApplicationController
   before_filter :require_current_conference!
 
   def index
-    @speakers = PersonalProfile.joins(user: [{events: [:slot] }]).where(conference: current_conference).uniq
+    @speakers = PersonalProfile.joins(user: {participations: {event: :proposition}}).where(events: {id: current_conference.approved_events.pluck(:id)}).distinct
   end
 end

app/models/conference.rb

@@ -14,8 +14,7 @@ class Conference < ActiveRecord::Base
   has_many :halls
   has_many :event_types
   has_many :events
-  has_many :approved_events,
-    -> { joins(:proposition).where(propositions: {status: Proposition.statuses[:approved]}) }, class_name: 'Event'
+  has_many :approved_events, -> { joins(:proposition).approved }, class_name: 'Event'
   has_many :conflict_counts, through: :events
   has_many :volunteer_teams
   has_many :volunteers

app/models/event.rb

@@ -15,6 +15,7 @@ class Event < ActiveRecord::Base
   belongs_to :event_type
 
   scope :ranked, -> { where.not(ranked: nil).where.not(votes: nil) }
+  scope :approved, -> { where(propositions: {status: Proposition.statuses[:approved]})}
 
   validates :conference, presence: true
   validates :title, presence: true