Initial commit

db/migrate/20181115100105_create_activities.rb

@@ -0,0 +1,15 @@
+class CreateActivities < ActiveRecord::Migration[5.2]
+  def change
+    create_table :activities do |t|
+      t.references :user,       null: false
+      t.string     :user_ip,    null: false
+      t.string     :user_agent, null: false
+      t.string     :topic,      null: false
+      t.string     :action,     null: false
+      t.string     :result,     null: false
+      t.text       :data,       null: true
+
+      t.timestamp  :created_at # avoid updated_at as records not supposed to be updated
+    end
+  end
+end