diff --git a/app/models/gitea/public_key.rb b/app/models/gitea/public_key.rb
index bb219235..2ce09052 100644
--- a/app/models/gitea/public_key.rb
+++ b/app/models/gitea/public_key.rb
@@ -1,3 +1,24 @@
+# == Schema Information
+#
+# Table name: public_key
+#
+#  id              :integer          not null, primary key
+#  owner_id        :integer          not null
+#  name            :string(255)      not null
+#  fingerprint     :string(255)      not null
+#  content         :text(65535)      not null
+#  mode            :integer          default("2"), not null
+#  type            :integer          default("1"), not null
+#  login_source_id :integer          default("0"), not null
+#  created_unix    :integer
+#  updated_unix    :integer
+#
+# Indexes
+#
+#  IDX_public_key_fingerprint  (fingerprint)
+#  IDX_public_key_owner_id     (owner_id)
+#
+
 class Gitea::PublicKey < Gitea::Base
   self.inheritance_column = nil # FIX  The single-table inheritance mechanism failed
   # establish_connection :gitea_db
diff --git a/app/models/gitea/webhook.rb b/app/models/gitea/webhook.rb
index f60f5678..77aa3c7d 100644
--- a/app/models/gitea/webhook.rb
+++ b/app/models/gitea/webhook.rb
@@ -1,3 +1,34 @@
+# == Schema Information
+#
+# Table name: webhook
+#
+#  id                :integer          not null, primary key
+#  repo_id           :integer
+#  org_id            :integer
+#  url               :text(65535)
+#  signature         :text(65535)
+#  http_method       :string(255)
+#  content_type      :integer
+#  secret            :text(65535)
+#  events            :text(65535)
+#  is_ssl            :boolean
+#  is_active         :boolean
+#  hook_task_type    :integer
+#  meta              :text(65535)
+#  last_status       :integer
+#  created_unix      :integer
+#  updated_unix      :integer
+#  is_system_webhook :boolean          default("0"), not null
+#
+# Indexes
+#
+#  IDX_webhook_created_unix  (created_unix)
+#  IDX_webhook_is_active     (is_active)
+#  IDX_webhook_org_id        (org_id)
+#  IDX_webhook_repo_id       (repo_id)
+#  IDX_webhook_updated_unix  (updated_unix)
+#
+
 class Gitea::Webhook < Gitea::Base 
   serialize :events, JSON
   self.inheritance_column = nil
@@ -10,4 +41,4 @@ class Gitea::Webhook < Gitea::Base
   enum hook_task_type: {gogs: 1, slack: 2, gitea: 3, discord: 4, dingtalk: 5, telegram: 6, msteams: 7, feishu: 8, matrix: 9}
   enum last_status: {waiting: 0, succeed: 1, fail: 2}
   enum content_type: {json: 1, form: 2}
-end
\ No newline at end of file
+end
diff --git a/app/models/gitea/webhook_task.rb b/app/models/gitea/webhook_task.rb
index d19a163a..21f42c6a 100644
--- a/app/models/gitea/webhook_task.rb
+++ b/app/models/gitea/webhook_task.rb
@@ -1,3 +1,30 @@
+# == Schema Information
+#
+# Table name: hook_task
+#
+#  id               :integer          not null, primary key
+#  repo_id          :integer
+#  hook_id          :integer
+#  uuid             :string(255)
+#  type             :integer
+#  url              :text(65535)
+#  signature        :text(65535)
+#  payload_content  :text(65535)
+#  http_method      :string(255)
+#  content_type     :integer
+#  event_type       :string(255)
+#  is_ssl           :boolean
+#  is_delivered     :boolean
+#  delivered        :integer
+#  is_succeed       :boolean
+#  request_content  :text(65535)
+#  response_content :text(65535)
+#
+# Indexes
+#
+#  IDX_hook_task_repo_id  (repo_id)
+#
+
 class Gitea::WebhookTask < Gitea::Base 
   serialize :payload_content, JSON
   serialize :request_content, JSON
@@ -10,4 +37,4 @@ class Gitea::WebhookTask < Gitea::Base
   belongs_to :webhook, class_name: "Gitea::Webhook", foreign_key: :hook_id
 
   enum type: {gogs: 1, slack: 2, gitea: 3, discord: 4, dingtalk: 5, telegram: 6, msteams: 7, feishu: 8, matrix: 9}
-end
\ No newline at end of file
+end
diff --git a/app/models/statistic.rb b/app/models/statistic.rb
new file mode 100644
index 00000000..4785060f
--- /dev/null
+++ b/app/models/statistic.rb
@@ -0,0 +1,24 @@
+# == Schema Information
+#
+# Table name: statistics
+#
+#  id         :integer          not null, primary key
+#  dau        :integer
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+
+class Statistic < ApplicationRecord
+  def self.record
+    users = User.all
+    count = 0
+    t = Time.now - 1.day
+    # t = Time.now.at_beginning_of_day
+    users.each do |u|
+      if !u.last_login_on.nil? && u.last_login_on >= t
+        count += 1
+      end
+    end
+    Statistic.create(dau: count)
+  end
+end
diff --git a/config/schedule.rb b/config/schedule.rb
index 1c05b516..6833ca1a 100644
--- a/config/schedule.rb
+++ b/config/schedule.rb
@@ -23,6 +23,9 @@ set :environment, :development
 every '0 1 20 * *' do
   runner 'Sponsorship.monthly_payment'
 end
+every '0 2 * * *' do
+  runner 'Statistic.record'
+end
 # every 1.month, at: 'January 20th 10:00am' do
 #   runner 'Sponsorship.monthly_payment'
 # end
diff --git a/db/migrate/20211207012816_create_statistics.rb b/db/migrate/20211207012816_create_statistics.rb
new file mode 100644
index 00000000..a0af01ee
--- /dev/null
+++ b/db/migrate/20211207012816_create_statistics.rb
@@ -0,0 +1,9 @@
+class CreateStatistics < ActiveRecord::Migration[5.2]
+  def change
+    create_table :statistics do |t|
+      t.integer :dau
+
+      t.timestamps
+    end
+  end
+end
diff --git a/spec/models/statistic_spec.rb b/spec/models/statistic_spec.rb
new file mode 100644
index 00000000..ba27a8f2
--- /dev/null
+++ b/spec/models/statistic_spec.rb
@@ -0,0 +1,5 @@
+require 'rails_helper'
+
+RSpec.describe Statistic, type: :model do
+  pending "add some examples to (or delete) #{__FILE__}"
+end