ensure we have a bigint id

db/migrate/20131122064921_increase_twitter_user_id_length.rb

@@ -0,0 +1,5 @@
+class IncreaseTwitterUserIdLength < ActiveRecord::Migration
+  def change
+    change_column :twitter_user_infos, :twitter_user_id, :bigint
+  end
+end

spec/models/twitter_user_info_spec.rb

@@ -0,0 +1,10 @@
+require 'spec_helper'
+
+describe TwitterUserInfo do
+  it "does not overflow" do
+    id =  22019458041
+    info = TwitterUserInfo.create!(user_id: -1, screen_name: 'sam', twitter_user_id: id)
+    info.reload
+    info.twitter_user_id.should == id
+  end
+end