Toyアプリケーション作成（チュートリアル２章）

app/assets/javascripts/microposts.coffee

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+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://coffeescript.org/

app/assets/javascripts/users.coffee

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+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://coffeescript.org/

app/assets/stylesheets/microposts.scss

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+// Place all the styles related to the Microposts controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/

app/assets/stylesheets/scaffolds.scss

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+body {
+  background-color: #fff;
+  color: #333;
+  margin: 33px;
+  font-family: verdana, arial, helvetica, sans-serif;
+  font-size: 13px;
+  line-height: 18px;
+}
+
+p, ol, ul, td {
+  font-family: verdana, arial, helvetica, sans-serif;
+  font-size: 13px;
+  line-height: 18px;
+}
+
+pre {
+  background-color: #eee;
+  padding: 10px;
+  font-size: 11px;
+}
+
+a {
+  color: #000;
+
+  &:visited {
+    color: #666;
+  }
+
+  &:hover {
+    color: #fff;
+    background-color: #000;
+  }
+}
+
+th {
+  padding-bottom: 5px;
+}
+
+td {
+  padding: 0 5px 7px;
+}
+
+div {
+  &.field, &.actions {
+    margin-bottom: 10px;
+  }
+}
+
+#notice {
+  color: green;
+}
+
+.field_with_errors {
+  padding: 2px;
+  background-color: red;
+  display: table;
+}
+
+#error_explanation {
+  width: 450px;
+  border: 2px solid red;
+  padding: 7px 7px 0;
+  margin-bottom: 20px;
+  background-color: #f0f0f0;
+
+  h2 {
+    text-align: left;
+    font-weight: bold;
+    padding: 5px 5px 5px 15px;
+    font-size: 12px;
+    margin: -7px -7px 0;
+    background-color: #c00;
+    color: #fff;
+  }
+
+  ul li {
+    font-size: 12px;
+    list-style: square;
+  }
+}
+
+label {
+  display: block;
+}

app/assets/stylesheets/users.scss

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+// Place all the styles related to the Users controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/

app/controllers/microposts_controller.rb

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+class MicropostsController < ApplicationController
+  before_action :set_micropost, only: %i[ show edit update destroy ]
+
+  # GET /microposts or /microposts.json
+  def index
+    @microposts = Micropost.all
+  end
+
+  # GET /microposts/1 or /microposts/1.json
+  def show
+  end
+
+  # GET /microposts/new
+  def new
+    @micropost = Micropost.new
+  end
+
+  # GET /microposts/1/edit
+  def edit
+  end
+
+  # POST /microposts or /microposts.json
+  def create
+    @micropost = Micropost.new(micropost_params)
+
+    respond_to do |format|
+      if @micropost.save
+        format.html { redirect_to micropost_url(@micropost), notice: "Micropost was successfully created." }
+        format.json { render :show, status: :created, location: @micropost }
+      else
+        format.html { render :new, status: :unprocessable_entity }
+        format.json { render json: @micropost.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # PATCH/PUT /microposts/1 or /microposts/1.json
+  def update
+    respond_to do |format|
+      if @micropost.update(micropost_params)
+        format.html { redirect_to micropost_url(@micropost), notice: "Micropost was successfully updated." }
+        format.json { render :show, status: :ok, location: @micropost }
+      else
+        format.html { render :edit, status: :unprocessable_entity }
+        format.json { render json: @micropost.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /microposts/1 or /microposts/1.json
+  def destroy
+    @micropost.destroy
+
+    respond_to do |format|
+      format.html { redirect_to microposts_url, notice: "Micropost was successfully destroyed." }
+      format.json { head :no_content }
+    end
+  end
+
+  private
+    # Use callbacks to share common setup or constraints between actions.
+    def set_micropost
+      @micropost = Micropost.find(params[:id])
+    end
+
+    # Only allow a list of trusted parameters through.
+    def micropost_params
+      params.require(:micropost).permit(:content, :user_id)
+    end
+end

app/controllers/users_controller.rb

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+class UsersController < ApplicationController
+  before_action :set_user, only: %i[ show edit update destroy ]
+
+  # GET /users or /users.json
+  def index
+    @users = User.all
+  end
+
+  # GET /users/1 or /users/1.json
+  def show
+  end
+
+  # GET /users/new
+  def new
+    @user = User.new
+  end
+
+  # GET /users/1/edit
+  def edit
+  end
+
+  # POST /users or /users.json
+  def create
+    @user = User.new(user_params)
+
+    respond_to do |format|
+      if @user.save
+        format.html { redirect_to user_url(@user), notice: "User was successfully created." }
+        format.json { render :show, status: :created, location: @user }
+      else
+        format.html { render :new, status: :unprocessable_entity }
+        format.json { render json: @user.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # PATCH/PUT /users/1 or /users/1.json
+  def update
+    respond_to do |format|
+      if @user.update(user_params)
+        format.html { redirect_to user_url(@user), notice: "User was successfully updated." }
+        format.json { render :show, status: :ok, location: @user }
+      else
+        format.html { render :edit, status: :unprocessable_entity }
+        format.json { render json: @user.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /users/1 or /users/1.json
+  def destroy
+    @user.destroy
+
+    respond_to do |format|
+      format.html { redirect_to users_url, notice: "User was successfully destroyed." }
+      format.json { head :no_content }
+    end
+  end
+
+  private
+    # Use callbacks to share common setup or constraints between actions.
+    def set_user
+      @user = User.find(params[:id])
+    end
+
+    # Only allow a list of trusted parameters through.
+    def user_params
+      params.require(:user).permit(:name, :email)
+    end
+end

app/helpers/microposts_helper.rb

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+module MicropostsHelper
+end

app/helpers/users_helper.rb

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+module UsersHelper
+end

app/models/micropost.rb

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+class Micropost < ApplicationRecord
+    belongs_to :user
+    validates :content, length: { maximum: 140 },
+    presence: true
+end

app/models/user.rb

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+class User < ApplicationRecord
+    has_many :microposts
+    validates :name , presence: true
+    validates :email , presence: true
+end

app/views/microposts/_form.html.erb

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+<%= form_with(model: micropost, local: true) do |form| %>
+  <% if micropost.errors.any? %>
+    <div id="error_explanation">
+      <h2><%= pluralize(micropost.errors.count, "error") %> prohibited this micropost from being saved:</h2>
+
+      <ul>
+      <% micropost.errors.full_messages.each do |message| %>
+        <li><%= message %></li>
+      <% end %>
+      </ul>
+    </div>
+  <% end %>
+
+  <div class="field">
+    <%= form.label :content %>
+    <%= form.text_area :content %>
+  </div>
+
+  <div class="field">
+    <%= form.label :user_id %>
+    <%= form.number_field :user_id %>
+  </div>
+
+  <div class="actions">
+    <%= form.submit %>
+  </div>
+<% end %>

app/views/microposts/_micropost.json.jbuilder

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+json.extract! micropost, :id, :content, :user_id, :created_at, :updated_at
+json.url micropost_url(micropost, format: :json)

app/views/microposts/edit.html.erb

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+<h1>Editing Micropost</h1>
+
+<%= render 'form', micropost: @micropost %>
+
+<%= link_to 'Show', @micropost %> |
+<%= link_to 'Back', microposts_path %>

app/views/microposts/index.html.erb

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+<p id="notice"><%= notice %></p>
+
+<h1>Microposts</h1>
+
+<table>
+  <thead>
+    <tr>
+      <th>Content</th>
+      <th>User</th>
+      <th colspan="3"></th>
+    </tr>
+  </thead>
+
+  <tbody>
+    <% @microposts.each do |micropost| %>
+      <tr>
+        <td><%= micropost.content %></td>
+        <td><%= micropost.user_id %></td>
+        <td><%= link_to 'Show', micropost %></td>
+        <td><%= link_to 'Edit', edit_micropost_path(micropost) %></td>
+        <td><%= link_to 'Destroy', micropost, method: :delete, data: { confirm: 'Are you sure?' } %></td>
+      </tr>
+    <% end %>
+  </tbody>
+</table>
+
+<br>
+
+<%= link_to 'New Micropost', new_micropost_path %>

app/views/microposts/index.json.jbuilder

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+json.array! @microposts, partial: "microposts/micropost", as: :micropost

app/views/microposts/new.html.erb

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+<h1>New Micropost</h1>
+
+<%= render 'form', micropost: @micropost %>
+
+<%= link_to 'Back', microposts_path %>

app/views/microposts/show.html.erb

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+<p id="notice"><%= notice %></p>
+
+<p>
+  <strong>Content:</strong>
+  <%= @micropost.content %>
+</p>
+
+<p>
+  <strong>User:</strong>
+  <%= @micropost.user_id %>
+</p>
+
+<%= link_to 'Edit', edit_micropost_path(@micropost) %> |
+<%= link_to 'Back', microposts_path %>

app/views/microposts/show.json.jbuilder

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+json.partial! "microposts/micropost", micropost: @micropost

app/views/users/_form.html.erb

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+<%= form_with(model: user, local: true) do |form| %>
+  <% if user.errors.any? %>
+    <div id="error_explanation">
+      <h2><%= pluralize(user.errors.count, "error") %> prohibited this user from being saved:</h2>
+
+      <ul>
+      <% user.errors.full_messages.each do |message| %>
+        <li><%= message %></li>
+      <% end %>
+      </ul>
+    </div>
+  <% end %>
+
+  <div class="field">
+    <%= form.label :name %>
+    <%= form.text_field :name %>
+  </div>
+
+  <div class="field">
+    <%= form.label :email %>
+    <%= form.text_field :email %>
+  </div>
+
+  <div class="actions">
+    <%= form.submit %>
+  </div>
+<% end %>

app/views/users/_user.json.jbuilder

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+json.extract! user, :id, :name, :email, :created_at, :updated_at
+json.url user_url(user, format: :json)

app/views/users/edit.html.erb

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+<h1>Editing User</h1>
+
+<%= render 'form', user: @user %>
+
+<%= link_to 'Show', @user %> |
+<%= link_to 'Back', users_path %>