:id => false in events and users table for rails4

db/migrate/20130105120616_create_events.rb

@@ -1,6 +1,6 @@
 class CreateEvents < ActiveRecord::Migration
   def change
-    create_table :events do |t|
+    create_table :events, :id => false do |t|
       t.primary_key :id
       t.string :adapt_url
       t.string :title

db/migrate/20130106131926_create_users.rb

@@ -1,6 +1,6 @@
 class CreateUsers < ActiveRecord::Migration
   def change
-    create_table :users do |t|
+    create_table :users, :id => false do |t|
       t.primary_key :id
       t.string  :avatar
       t.string  :signature

db/schema.rb

@@ -27,8 +27,8 @@
     t.integer  "wisher_count"
     t.datetime "begin_time"
     t.datetime "end_time"
-    t.datetime "created_at",        null: false
-    t.datetime "updated_at",        null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
     t.string   "owner_id"
   end
 
@@ -45,8 +45,8 @@
     t.string   "signature"
     t.string   "uid"
     t.string   "name"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
   end
 
   create_table "wish_users", id: false, force: true do |t|

lib/tasks/update_events_info.rake

@@ -10,7 +10,7 @@ namespace :douban do
       users = User.all.map(&:id)
       event.wishers = User.where(:id=>wishers&users)
       event.participanters = User.where(:id=>participanters&users)
-      sleep 10
+      sleep 15
     end
   end