[Day9 Rails Tutorial]第九章完｜難しすぎ初めてこんなに詰まった[9.1〜9.4]

class User < ApplicationRecord
  attr_accessor :remember_token
  ...
  # ランダムなトークンを返す
  def User.new_token
    SecureRandom.urlsafe_base64
  end
  # 永続セッションのためにユーザーをデータベースに記憶する
  def remember
    self.remember_token = User.new_token
    update_attribute(:remember_digest, User.digest(remember_token))
  end
end

class User < ApplicationRecord
  attr_accessor :remember_token
  ...
  # 渡されたトークンがダイジェストと一致したらtrueを返す
  def authenticated?(remember_token)
    BCrypt::Password.new(remember_digest).is_password?(remember_token)
  end
end

module SessionsHelper
  ...
  # ユーザーのセッションを永続的にする
  def remember(user)
    user.remember
    cookies.permanent.signed[:user_id] = user.id
    cookies.permanent[:remember_token] = user.remember_token
  end
  ...
end

class SessionsController < ApplicationController
  ...
  def create
    user = User.find_by(email: params[:session][:email].downcase)
    if user && user.authenticate(params[:session][:password])
      log_in user
      remember user
      redirect_to user
    else
      flash.now[:danger] = 'Invalid email/password combination'
      render 'new'
    end
  end
  ...
end

module SessionsHelper
  ...
  # 記憶トークンcookieに対応するユーザーを返す
  def current_user
    if (user_id = session[:user_id])
      @current_user ||= User.find_by(id: user_id)
    elsif (user_id = cookies.signed[:user_id])
      user = User.find_by(id: user_id)
      if user && user.authenticated?(cookies[:remember_token])
        log_in user
        @current_user = user
      end
    end
  end
  ...
end

class User < ApplicationRecord
attr_accessor :remember_token
...
  # ユーザーのログイン情報を破棄する
  def forget
    update_attribute(:remember_digest, nil)
  end
  ...

end

module SessionsHelper
  ...
  # 永続的セッションを破棄する
  def forget(user)
    user.forget
    cookies.delete(:user_id)
    cookies.delete(:remember_token)
  end
  # 現在のユーザーをログアウトする
  def log_out
    forget(current_user)
    session.delete(:user_id)
    @current_user = nil
  end
end

<% provide(:title, "Log in") %>
<h1>Log in</h1>

   ...

<div class="row">
  <div class="col-md-6 col-md-offset-3">
    <%= form_for(:session, url: login_path) do |f| %>
      ...
      <%= f.label :remember_me, class: "checkbox inline" do %>
        <%= f.check_box :remember_me %>
        <span>Remember me on this computer</span>
      <% end %>
       ...
  </div>
</div>

class SessionsController < ApplicationController
  ...
  def create
    user = User.find_by(email: params[:session][:email].downcase)
    if user && user.authenticate(params[:session][:password])
      log_in user
      params[:session][:remember_me] == '1' ? remember(user) : forget(user)
      redirect_to user
    else
      flash.now[:danger] = 'Invalid email/password combination'
      render 'new'
    end
  end
  ...
end

A server is already running. Check C:/rails_book/devise/tmp/pids/server.pid.

Address already in use - bind(2) for "127.0.0.1" port 8080 (Errno::EADDRINUSE)

COMMAND   PID     USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
ruby    16343 ec2-user   11u  IPv4  44080      0t0  TCP localhost:webcache (LISTEN)