Agregar created_at a access_logs para poder agrupar por fecha

db/migrate/20210807004941_add_create_at_to_access_logs.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+# Cambia los msec a datetime para poder agregar por tiempos
+class AddCreateAtToAccessLogs < ActiveRecord::Migration[6.1]
+  def up
+    add_column :access_logs, :created_at, :datetime, precision: 6
+
+    create_trigger(compatibility: 1).on(:access_logs).before(:insert) do
+      'new.created_at := to_timestamp(new.msec)'
+    end
+
+    ActiveRecord::Base.connection.execute('update access_logs set created_at = to_timestamp(msec);')
+  end
+
+  def down
+    remove_column :access_logs, :created_at
+  end
+end