FEATURE: Create UserProfilerView.

app/models/user_profile_view.rb

@@ -0,0 +1,5 @@
+class UserProfileView < ActiveRecord::Base
+  validates :user_profile_id, presence: true
+  validates :viewed_at, presence: true
+  validates :ip_address, presence: true
+end

db/migrate/20150914021445_create_user_profile_views.rb

@@ -0,0 +1,15 @@
+class CreateUserProfileViews < ActiveRecord::Migration
+  def change
+    create_table :user_profile_views do |t|
+      t.integer :user_profile_id, null: false
+      t.datetime :viewed_at, null: false
+      t.inet :ip_address, null: false
+      t.integer :user_id
+    end
+
+    add_index :user_profile_views, :user_profile_id
+    add_index :user_profile_views, :user_id
+    add_index :user_profile_views, [:viewed_at, :ip_address, :user_profile_id], where: "user_id IS NULL", unique: true, name: 'unique_profile_view_ip'
+    add_index :user_profile_views, [:viewed_at, :user_id, :user_profile_id], where: "user_id IS NOT NULL", unique: true, name: 'unique_profile_view_user'
+  end
+end