[Ruby on Rails] Logical deletion (withdrawal function)


画面収録 2020-10-25 21.31.39.mov.gif

Development environment

ruby 2.5.7 Rails OS: macOS Catalina


-[Ruby on Rails] How to log in with only your name and password using gem devise -[Ruby on Rails] Change URL id to column name We will continue to edit the code.


Add 1 column 2 Edit model 3 Edit controller

Add column


$ rails g migration AddIsValidToUsers is_valid:boolean

Added default: true and null: false. By using boolean, it is determined whether or not you have unsubscribed with ture or false. In the following cases, the initial value is set to true, so if you have already withdrawn, it will be false.


class AddIsValidToUsers < ActiveRecord::Migration[5.2]
  def change
    add_column :users, :is_valid, :boolean, default: true, null: false


$ rails db:migrate

Editing controller

Create unsubscribe screen and unsubscribe action


  def unsubscribe
    @user = User.find_by(name: params[:name])

  def withdraw
    @user = User.find_by(name: params[:name])
    @user.update(is_valid: false)
    redirect_to root_path

A description that prevents login after withdrawal.


class Users::SessionsController < Devise::SessionsController
  before_action :reject_inactive_user, only: [:create]


  def reject_inactive_user
    @user = User.find_by(name: params[:user][:name])
    if @user
      if @user.valid_password?(params[:user][:password]) && [email protected]_valid
        redirect_to new_user_session_path

Edit routes


get 'unsubscribe/:name' => 'homes#unsubscribe', as: 'confirm_unsubscribe'
patch ':id/withdraw/:name' => 'homes#withdraw', as: 'withdraw_user'
put 'withdraw/:name' => 'users#withdraw'

Edit view


  <h2>Do you really want to unsubscribe?</h2>
    <p>To unsubscribe, click "Unsubscribe".</p>
    <%= link_to 'Do not withdraw', mypage_path(@user) %>
    <%= link_to "Withdraw", withdraw_user_path(@user), method: :patch %>




I think there are various advantages and disadvantages of logical deletion, Customer information is important when operating a service, so It is better to unsubscribe by logical deletion instead of physical deletion It is recommended because it can be used as a means of revival.

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