add trashable concern on user

app/models/concerns/trashable.rb

@@ -0,0 +1,21 @@
+module Trashable
+  extend ActiveSupport::Concern
+
+  included do
+    default_scope { where(deleted_at: nil) }
+  end
+
+  module ClassMethods
+    def trashed
+      self.unscoped.where(self.arel_table[:deleted_at].not_eq(nil))
+    end
+  end
+
+  def destroy
+    update_column :deleted_at, Time.now
+  end
+
+  def recover
+    update_attribute :deleted_at, nil
+  end
+end

app/models/user.rb

@@ -4,6 +4,7 @@
 #
 #  id                     :bigint           not null, primary key
 #  avatar_url             :string
+#  deleted_at             :datetime
 #  email                  :string           default(""), not null
 #  encrypted_password     :string           default(""), not null
 #  name                   :string           not null
@@ -20,6 +21,7 @@
 #  index_users_on_reset_password_token  (reset_password_token) UNIQUE
 #
 class User < ApplicationRecord
+  include Trashable
   extend Enumerize
 
   devise :database_authenticatable,
@@ -38,7 +40,6 @@ class User < ApplicationRecord
 
   before_validation :set_random_password, on: :create
 
-
   roles.values.each do |role|
     define_method "#{role}?" do
       roles.include?(role)