edited models and added foreign keys

Election/app/models/candidate.rb

@@ -2,4 +2,6 @@ class Candidate < ActiveRecord::Base
 	validates :first_name, presence: true
 	validates :last_name, presence: true
 	validates :slogan, uniqueness: true, presence: true
+	belongs_to :position
+	has_many :votes
 end

Election/db/migrate/20160718030435_add_user_to_votes.rb

+class AddUserToVotes < ActiveRecord::Migration
+  def change
+    add_reference :votes, :user, index: true, foreign_key: true
+  end
+end

Election/db/migrate/20160718031224_add_candidate_to_votes.rb

+class AddCandidateToVotes < ActiveRecord::Migration
+  def change
+    add_reference :votes, :candidate, index: true, foreign_key: true
+  end
+end

Election/db/migrate/20160718031721_add_candidate_to_positions.rb

+class AddCandidateToPositions < ActiveRecord::Migration
+  def change
+    add_reference :positions, :candidate, index: true, foreign_key: true
+  end
+end

Election/db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160718023237) do
+ActiveRecord::Schema.define(version: 20160718031721) do
 
   create_table "candidates", force: :cascade do |t|
     t.string   "first_name"
@@ -25,10 +25,13 @@ ActiveRecord::Schema.define(version: 20160718023237) do
 
   create_table "positions", force: :cascade do |t|
     t.string   "name"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at",   null: false
+    t.datetime "updated_at",   null: false
+    t.integer  "candidate_id"
   end
 
+  add_index "positions", ["candidate_id"], name: "index_positions_on_candidate_id"
+
   create_table "users", force: :cascade do |t|
     t.string   "email",                  default: "", null: false
     t.string   "encrypted_password",     default: "", null: false
@@ -49,8 +52,13 @@ ActiveRecord::Schema.define(version: 20160718023237) do
 
   create_table "votes", force: :cascade do |t|
     t.text     "comments"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at",   null: false
+    t.datetime "updated_at",   null: false
+    t.integer  "user_id"
+    t.integer  "candidate_id"
   end
 
+  add_index "votes", ["candidate_id"], name: "index_votes_on_candidate_id"
+  add_index "votes", ["user_id"], name: "index_votes_on_user_id"
+
 end