Ruby on RailsでWebサイト公開！に挑戦中

<% if signed_in? %>
  <div class="row">
    <aside class="span4">
      <section>
        <%= render 'shared/user_info' %>
      </section>
      <section>
        <%= render 'shared/micropost_form' %>
      </section>
    </aside>
    <div class="span8">
      <h3>マイクロポストフィード</h3>
      <%= render 'shared/feed' %>
    </div>
  </div>

<% if @feed_items.any? %>
  <ol class="microposts">
    <%= render partial: 'shared/feed_item', collection: @feed_items %>
  </ol>
  <%= will_paginate @feed_items %>
<% end %>

<li id="<%= feed_item.id %>">
  <span class="user">
    <%= link_to feed_item.user.name, feed_item.user %>
  </span>
  <span class="content"><%= feed_item.content %></span>
  <span class="timestamp">
    Posted <%= time_ago_in_words(feed_item.created_at) %> ago.
  </span>
</li>

def home
    if signed_in?
      @micropost  = current_user.microposts.build
      @feed_items = current_user.feed.paginate(page: params[:page])
    end
  end

  def feed
    Micropost.where("user_id = ?", id)
  end

def create
    @micropost = current_user.microposts.build(micropost_params)
    if @micropost.save
      flash[:success] = "マイクロポストを登録しました！"
      redirect_to root_path
    else
      @feed_items = []
      render 'static_pages/home'
    end
  end

<% provide(:title, 'ホームページ') %>
<% if signed_in? %>
  <div class="row">
    <aside class="span4">
      <section>
        <%= render 'shared/user_info' %>
      </section>
      <section>
        <%= render 'shared/micropost_form' %>
      </section>
    </aside>
  </div>
<% else %>
  <div class="center hero-unit">
    <h1>サンプルアプリの<%= yield(:title) %></h1>
    <h2>
      <a href="http://railstutorial.org/">Ruby on Rails Tutorial</a>
  を参考にして作成したサンプルアプリの<%= yield(:title) %>です。
    </h2>
    <%= link_to "今すぐ登録!", signup_path,
                                class: "btn btn-large btn-primary" %>
  </div>
  <%= link_to image_tag("rails.png", alt: "Rails"), 'http://rubyonrails.org/' %>
<% end %>

<%= form_for @micropost, url: microposts_path do |f| %>
  <%= render 'shared/error_messages', object: f.object %>
  <div class="field">
    <%= f.text_area :content, placeholder: "マイクロポスト投稿" %>
  </div>
  <%= f.submit "Post", class: "btn btn-large btn-primary" %>
<% end %>

def home
  @micropost = current_user.microposts.build if signed_in?
end

<%= form_for(@micropost) do |f| %>
  <%= render 'shared/error_messages', object: f.object %>

<% if object.errors.any? %>
  <div id="error_explanation">
    <div class="alert alert-error">
      フォームの入力内容に <%= object.errors.count %>個のエラーがあります。
    </div>
    <ul>
    <% object.errors.full_messages.each do |msg| %>
      <li>* <%= msg %></li>
    <% end %>
    </ul>
  </div>
<% end %>

class MicropostsController < ApplicationController
  before_action :signed_in_user, only: [:create, :destroy]

  def index
  end

  def create
    @micropost = current_user.microposts.build(micropost_params)
    if @micropost.save
      flash[:success] = "マイクロポストを登録しました！"
      redirect_to root_path
    else
      render 'static_pages/home'
    end
  end

  def destroy
  end

  private

    def micropost_params
      params.require(:micropost).permit(:content)
    end
end

/* microposts */

aside {
  textarea {
    height: 100px;
    margin-bottom: 5px;
  }
}

def signed_in_user
  unless signed_in?
    store_location
    redirect_to signin_path, notice: "ログインしてください。"
  end
end

class MicropostsController < ApplicationController
  before_action :signed_in_user, only: [:create, :destroy]

  def index
  end

  def create
  end

  def destroy
  end
end

<% provide(:title, @user.name) %>
<div class="row-fluid">
  <div class="span4">
    <h3><%= @user.name %></h3>
    左サイドバーには、ユーザーのプロファイル情報の概要を表示します。
  </div>
  <div class="span8">
    <% if @user.microposts.any? %>
      <h3>マイクロポスト (<%= @user.microposts.count %>)</h3>
      <ol class="microposts">
        <%= render @microposts %>
      </ol>
      <%= will_paginate @microposts %>
    <% end %>
  </div>
</div>

<li>
  <span class="content"><%= micropost.content %></span>
  <span class="timestamp">
    投稿日 <%= time_ago_in_words(micropost.created_at) %> 前
  </span>
</li>

  def show
    @user = User.find(params[:id])
    @microposts = @user.microposts.paginate(page: params[:page], :per_page => 5)
  end

/* microposts */

.microposts {
  list-style: none;
  margin: 10px 0 0 0;

  li {
    padding: 10px 0;
    border-top: 1px solid #e8e8e8;
  }
}
.content {
  display: block;
}
.timestamp {
  color: $grayLight;
}

class Micropost < ActiveRecord::Base
  belongs_to :user
  default_scope -> { order('created_at DESC') }
  validates :user_id, presence: true
end

class Micropost < ActiveRecord::Base
  belongs_to :user
  default_scope -> { order('created_at DESC') }
  validates :content, presence: true, length: { maximum: 140 }
  validates :user_id, presence: true
end

class Micropost < ActiveRecord::Base
  belongs_to :user
  validates :user_id, presence: true
end

class User < ActiveRecord::Base
  has_many :microposts, dependent: :destroy
　　：

class CreateMicroposts < ActiveRecord::Migration
  def change
    create_table :microposts do |t|
      t.string :content
      t.integer :user_id

      t.timestamps
    end
    add_index :microposts, [:user_id, :created_at]
  end
end

class Micropost < ActiveRecord::Base
  validates :user_id, presence: true
end

$ rake routes
     user GET    /users/:id(.:format)      users#show
          PATCH  /users/:id(.:format)      users#update
          PUT    /users/:id(.:format)      users#update
          DELETE /users/:id(.:format)      users#destroy

$ vi app/views/users/index.html.erb

　　：
<ul class="users">
  <% @users.each do |user| %>
    <li>
      <%= link_to user.name, user %>
      <% if current_user.admin? && !current_user?(user) %>
        | <%= link_to "ユーザー削除", user, method: :delete,
                                  data: { confirm: "削除してよろしいですか?" } %>
  <% end %>
    </li>
  <% end %>
</ul>

  def current_user
    remember_token = User.encrypt(cookies[:remember_token])
    @current_user ||= User.find_by(remember_token: remember_token)
  end

  def current_user?(user)
    user == current_user
  end

  def destroy
    User.find(params[:id]).destroy
    flash[:success] = "ユーザーが削除されました。"
    redirect_to users_path
  end

  before_action :admin_user,     only: :destroy
　　　：
  private
　　　；
    def admin_user
      redirect_to(root_path) unless current_user.admin?
    end

admin = User.create!(name: "管理１",
                         email: "admin1@example.com",
                         password: "admin1.t",
                         password_confirmation: "admin1.t",
                         admin: true)

$ vi db/migrate/20131017063604_add_admin_to_users.rb

class AddAdminToUsers < ActiveRecord::Migration
  def change
    add_column :users, :admin, :boolean, default: false
  end
end

$ rake routes
user GET    /users/:id(.:format)      users#show
     PATCH  /users/:id(.:format)      users#update

$ more  app/controllers/users_controller.rb

private

    def user_params
      params.require(:user).permit(:name, :email, :password,
                                   :password_confirmation)
    end

<% provide(:title, 'ユーザー一覧') %>
<h1>ユーザー一覧</h1>

<%= will_paginate %>

<ul class="users">
  <% @users.each do |user| %>
    <li>
      <%= link_to user.name, user %>
    </li>
  <% end %>
</ul>

<%= will_paginate %>

  def index
    @users = User.paginate(page: params[:page], :per_page => 5)
  end

class UsersController < ApplicationController
  before_action :signed_in_user, only: [:index, :edit, :update]
  before_action :correct_user,   only: [:edit, :update]

  def index
    @users = User.all
  end

<% provide(:title, 'ユーザー一覧') %>
<h1>ユーザー一覧</h1>

<ul class="users">
  <% @users.each do |user| %>
    <li>
      <%= link_to user.name, user %>
    </li>
  <% end %>
</ul>

/* Users index */

.users {
  list-style: none;
  margin: 0;
  li {
    overflow: auto;
    padding: 10px 0;
    border-top: 1px solid $grayLighter;
    &:last-child {
      border-bottom: 1px solid $grayLighter;
    }
  }
}

class UsersController < ApplicationController
  before_action :signed_in_user, only: [:edit, :update]
　　　：
   # Before filters
    def signed_in_user
      redirect_to signin_path, notice: "ログインしてください。" unless signed_in
?
    end

class SessionsController < ApplicationController
　　　：
  def create
    user = User.find_by(email: params[:session][:email].downcase)
    if user && user.authenticate(params[:session][:password])
      sign_in user
      redirect_to user
    else
      flash.now[:error] = '入力したメールアドレスまたはパスワードが間違っていま>す'
      render 'new'
    end
  end

修正前
# Before filters
def signed_in_user
  redirect_to signin_path, notice: "ログインしてください。" unless signed_in?
end

修正後
# Before filters
def signed_in_user
  unless signed_in?
    store_location
    redirect_to signin_path, notice: "ログインしてください。"
  end
end

  def create
    user = User.find_by(email: params[:session][:email].downcase)
    if user && user.authenticate(params[:session][:password])
      sign_in user
      redirect_back_or user
    else
      flash.now[:error] = '入力したメールアドレスまたはパスワードが間違っていま>す'
      render 'new'
    end
  end

$ vi app/helpers/sessions_helper.rb

  def redirect_back_or(default)
    redirect_to(session[:return_to] || default)
    session.delete(:return_to)
  end

  def store_location
    session[:return_to] = request.url if request.get?
  end

$ rake routes
　　　：
edit_user GET    /users/:id/edit(.:format) users#edit
          PATCH  /users/:id(.:format)      users#update

$ vi app/controllers/users_controller.rb

class UsersController < ApplicationController
  before_action :signed_in_user, only: [:edit, :update]
  before_action :correct_user,   only: [:edit, :update]
　　：
  def edit
  end

  def update
    if @user.update_attributes(user_params)
      flash[:success] = "ユーザ登録情報更新"
      redirect_to user_path
    else
      render 'edit'
    end
  end

  private
　　：
    def correct_user
      @user = User.find(params[:id])
      redirect_to(root_path) unless current_user?(@user)
    end

$ vi app/helpers/sessions_helper.rb

  def current_user?(user)
    user == current_user
  end

class UsersController < ApplicationController
  before_action :signed_in_user, only: [:edit, :update]

  private

 # Before filters
    def signed_in_user
      redirect_to signin_path, notice: "ログインしてください。" unless signed_in?
    end
end

<% flash.each do |key, value| %>
  <div class="alert alert-<%= key %>"><%= value %></div>
<% end %>

     user GET    /users/:id(.:format)      users#show
          PATCH  /users/:id(.:format)      users#update

  def update
    @user = User.find(params[:id])
    if @user.update_attributes(user_params)
      flash[:success] = "ユーザ登録情報更新"
      redirect_to user_path
    else
      render 'edit'
    end
  end
  private

    def user_params
      params.require(:user).permit(:name, :email, :password,
                                   :password_confirmation)
    end

<% flash.each do |key, value| %>
  <div class="alert alert-<%= key %>"><%= value %></div>
<% end %>

<form action="/users/13" class="edit_user" id="edit_user_13" method="post">
　　：
  <input name="_method" type="hidden" value="patch" />

     user GET    /users/:id(.:format)      users#show
          PATCH  /users/:id(.:format)      users#update

  def update
    @user = User.find(params[:id])
    if @user.update_attributes(user_params)
      # Handle a successful update.
    else
      render 'edit'
    end
  end
  private

    def user_params
      params.require(:user).permit(:name, :email, :password,
                                   :password_confirmation)
    end

  def edit
    @user = User.find(params[:id])
  end

<% provide(:title, "ユーザー編集") %>
<h1>プロファイル編集</h1>

<div class="row">
  <div class="span6 offset3">
    <%= form_for(@user) do |f| %>
      <%= render 'shared/error_messages' %>

      <%= f.label :名前 %>
      <%= f.text_field :name %>

      <%= f.label :メールアドレス %>
      <%= f.text_field :email %>

      <%= f.label :パスワード %>
      <%= f.password_field :password %>

      <%= f.label :パスワード確認, "確認のため再度パスワード入力" %>
      <%= f.password_field :password_confirmation %>

      <%= f.submit "保存", class: "btn btn-large btn-primary" %>
    <% end %>
  </div>
</div>

<form action="/users/13" class="edit_user" id="edit_user_13" method="post">
　　：
  <input name="_method" type="hidden" value="patch" />

$ rake routes
　　：
     user GET    /users/:id(.:format)      users#show
          PATCH  /users/:id(.:format)      users#update

  def sign_out
    self.current_user = nil
    cookies.delete(:remember_token)
  end

  def destroy
    sign_out
    redirect_to root_path
  end

def create
    @user = User.new(user_params)
    if @user.save
      sign_in @user
      flash[:success] = "サンプルアプリへようこそ！"
      redirect_to user_url(@user)
    else
      render 'new'
    end
  end

$ vi app/helpers/sessions_helper.rb

  def current_user=(user)
    @current_user = user
  end

  def current_user
    remember_token = User.encrypt(cookies[:remember_token])
    @current_user ||= User.find_by(remember_token: remember_token)
  end

  def signed_in?
    !current_user.nil?
  end

$ vi app/views/layouts/_header.html.erb

<header class="navbar navbar-fixed-top navbar-inverse">
  <div class="navbar-inner">
    <div class="container">
      <%= link_to "sample app", '#', id: "logo" %>
      <nav>
        <ul class="nav pull-right">
          <li><%= link_to "ホーム",root_path %></li>
          <li><%= link_to "ヘルプ", help_path %></li>
          <% if signed_in? %>
            <li><%= link_to "ユーザー一覧", '#' %></li>
            <li id="fat-menu" class="dropdown">
              <a href="#" class="dropdown-toggle" data-toggle="dropdown">アカウント<b class="caret"></b></a>
              <ul class="dropdown-menu">
                <li><%= link_to "プロファイル", current_user %></li>
                <li><%= link_to "編集", '#' %></li>
                <li class="divider"></li>
                <li>
                  <%= link_to "ログアウト", signout_path, method: "delete" %>
                </li>
              </ul>
            </li>
          <% else %>
            <li><%= link_to "ログイン", signin_path %></li>
          <% end %>
        </ul>
      </nav>
    </div>
  </div>
</header>

$ rails generate migration add_remember_token_to_users
      invoke  active_record
      create    db/migrate/20130930222143_add_remember_token_to_users.rb

$ vi db/migrate/20130930222143_add_remember_token_to_users.rb

class AddRememberTokenToUsers < ActiveRecord::Migration
  def change
    add_column :users, :remember_token, :string
    add_index  :users, :remember_token
  end
end

 private
    def create_remember_token
      self.remember_token = User.encrypt(User.new_remember_token)
    end

$ vi app/models/user.rb

class User < ActiveRecord::Base
　　　　：
  before_create :create_remember_token
　　　　：
  def User.new_remember_token
    SecureRandom.urlsafe_base64
  end

  def User.encrypt(token)
    Digest::SHA1.hexdigest(token.to_s)
  end

  private

    def create_remember_token
      self.remember_token = User.encrypt(User.new_remember_token)
    end
end

ApplicationController
　include SessionsHelper

SessionsController < ApplicationController
　def create
　　：
　　sign_in user
　end

module SessionsHelper
　def sign_in(user)
　　　：
　def current_user=(user)
　　　：
　def current_user
　　　：

$ vi app/controllers/application_controller.rb

class ApplicationController < ActionController::Base
  protect_from_forgery with: :exception
  include SessionsHelper
end

$ vi app/controllers/sessions_controller.rb

class SessionsController < ApplicationController

  def create
    user = User.find_by(email: params[:session][:email].downcase)
    if user && user.authenticate(params[:session][:password])
      sign_in user
      redirect_to user
    else
      flash.now[:error] = '入力したメールアドレスまたはパスワードが間違っていま>す'
      render 'new'
    end
  end
end

module SessionsHelper
  def sign_in(user)
    remember_token = User.new_remember_token
    cookies.permanent[:remember_token] = remember_token
    user.update_attribute(:remember_token, User.encrypt(remember_token))
    self.current_user = user
  end

  def current_user=(user)
    @current_user = user
  end

  def current_user
    remember_token = User.encrypt(cookies[:remember_token])
    @current_user ||= User.find_by(remember_token: remember_token)
  end
end

def create
  user = User.find_by(email: params[:session][:email].downcase)
  if user && user.authenticate(params[:session][:password])
  else
    flash.now[:error] = '入力したメールアドレスまたはパスワードが間違っていま>す'
    render 'new'
  end
end