second commit

app/assets/javascripts/tasks.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/tasks.scss

@@ -0,0 +1,3 @@
+// Place all the styles related to the Tasks controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/

app/controllers/tasks_controller.rb

@@ -0,0 +1,53 @@
+class TasksController < ApplicationController
+
+  before_action :new
+
+  def index
+    @tasks = Task.all
+  end
+
+  def show
+    @task = Task.find(params[:id])
+  end
+
+  def new
+    @task = Task.new
+  end
+
+  def create
+    @task = Task.new(task_params)
+    if @task.save
+      redirect_to tasks_path
+    else
+      flash.now[:alert] =@task.errors.full_messages
+      @tasks =  Task.all
+      render :index
+   end
+  end
+
+  def edit
+    @task = Task.find(params[:id])
+  end
+
+  def update
+    @task = Task.find(params[:id])
+    if @task.update(task_params)
+      redirect_to tasks_path
+    else
+      flash.now[:alert] = @task.errors.full_messages
+      render :index
+   end
+  end
+
+  def destroy
+    @task = Task.find(params[:id])
+    @task.destroy
+    redirect_to tasks_path
+  end
+
+  private
+
+  def task_params
+    params.require(:task).permit(:title, :body)
+  end
+end

app/helpers/tasks_helper.rb

@@ -0,0 +1,2 @@
+module TasksHelper
+end

app/models/task.rb

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+class Task < ApplicationRecord
+
+  validates :title, presence: true
+  validates :body, presence: true
+
+end

app/views/tasks/_new_task.html.erb

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+<h1>タスク登録</h1>
+
+  <% if flash["alert"].present? %>
+  <% flash["alert"].each do |value| %>
+    <%= content_tag(:div, value)%>
+    <% end %>
+  <%end%>
+
+  <%= form_with model: @task, local: true do |form| %>
+    <p>
+      タイトル<br>
+      <%= form.text_field :title %>
+    </p>
+
+    <p>
+      内容<br>
+      <%= form.text_area :body %>
+    </p>
+
+    <%= form.submit "登録" %>
+
+
+
+  <% end %>

app/views/tasks/edit.html.erb

@@ -0,0 +1,24 @@
+<h1>変更</h1>
+
+<% if flash["alert"].present? %>
+  <% flash["alert"].each do |value| %>
+      <%= content_tag(:div, value)%>
+    <% end %>
+  <%end%>
+
+  <%= form_with model: @task, local: true do |form| %>
+<p>
+  タイトル<br>
+  <%= form.text_field :title %>
+</p>
+
+<p>
+  内容<br>
+  <%= form.text_area :body%>
+</p>
+
+  <%= form.submit "更新" %>
+
+<% end %>
+
+   <%= link_to "戻る", task_path(@task)%>

app/views/tasks/index.html.erb

@@ -0,0 +1,12 @@
+<h1>タスク一覧</h1>
+
+
+<ul>
+  <% @tasks.each do |task| %>
+    <li><%= link_to task.title, task_path(task) %> | <%= link_to "削除", task_path(task), method: :delete %></li>
+  <% end %>
+</ul>
+
+<hr>
+
+<%= render partial: "new_task", locals: { message: @task } %>

app/views/tasks/new.html.erb

@@ -0,0 +1,25 @@
+<h1>タスク登録_new</h1>
+
+<ul>
+  <% if flash["alert"].present? %>
+    <font color= "red">【エラー内容】<br>
+    <% flash["alert"].each do |value| %>
+      <li><%= content_tag(:div, value)%></li>
+      <% end %>
+    <%end%>
+  </font><br>
+</ul>
+
+  <%= form_with model: @task, local: true do |form| %>
+    <p>
+      タイトル<br>
+      <%= form.text_field :title %>
+    </p>
+
+    <p>
+      内容<br>
+      <%= form.text_area :body %>
+    </p>
+
+    <%= form.submit "登録" %>
+  <% end %>

app/views/tasks/show.html.erb

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+<h1>タスク詳細</h1>
+
+<p>
+  <b>タイトル: <%= @task.title%> </b>
+</p>
+
+<p>
+  <b>内容: <%= @task.body %> </b>
+</p>
+
+  <p>
+    <%= link_to "編集", edit_task_path(@task) %>
+    <%= link_to "削除", task_path(@task), method: :delete %>
+    <%= link_to "戻る", tasks_path(@task)%>
+  </p>

config/routes.rb

@@ -1,3 +1,5 @@
 Rails.application.routes.draw do
-  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
+
+  resources :tasks
+
 end

db/migrate/20180312125056_create_tasks.rb

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+class CreateTasks < ActiveRecord::Migration[5.1]
+  def change
+    create_table :tasks do |t|
+      t.string :title
+      t.text :body
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

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+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# Note that this schema.rb definition is the authoritative source for your
+# database schema. If you need to create the application database on another
+# system, you should be using db:schema:load, not running all the migrations
+# from scratch. The latter is a flawed and unsustainable approach (the more migrations
+# you'll amass, the slower it'll run and the greater likelihood for issues).
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema.define(version: 20180312125056) do
+
+  create_table "tasks", force: :cascade do |t|
+    t.string "title"
+    t.text "body"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+  end
+
+end

db/seeds.rb

@@ -5,3 +5,19 @@
 #
 #   movies = Movie.create([{ name: 'Star Wars' }, { name: 'Lord of the Rings' }])
 #   Character.create(name: 'Luke', movie: movies.first)
+
+
+Task.create(
+  title: "タスク1",
+  body: "タスク1の内容"
+)
+
+Task.create(
+  title: "タスク2",
+  body: "タスク2の内容"
+)
+
+Task.create(
+  title: "タスク3",
+  body: "タスク3の内容"
+)

test/controllers/tasks_controller_test.rb

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+require 'test_helper'
+
+class TasksControllerTest < ActionDispatch::IntegrationTest
+  test "should get index" do
+    get tasks_index_url
+    assert_response :success
+  end
+
+end

test/fixtures/tasks.yml

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+# Read about fixtures at http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  title: MyString
+  body: MyText
+
+two:
+  title: MyString
+  body: MyText

test/models/task_test.rb

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+require 'test_helper'
+
+class TaskTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end