veiw ctpの書き方

コントローラーにメソッドを追加

<?php

// /posts/index
// /posts
// /(controller)/(action)/(options)

namespace App\Controller;

class PostsController extends AppController
{
  public function index()
  {
    $posts = $this->Posts->find('all');
      // ->order(['title' => 'DESC'])
      // ->limit(2)
      // ->where(['title like' => '%3']);
    $this->set('posts', $posts);
  }

  public function view($id = null)
  {
    $post = $this->Posts->get($id);
    $this->set(compact('post'));
  }
}

src->template->view.ctp

<?php
$this->assign('title', 'Blog Detail');
?>

<h1>
  <?= $this->Html->link('Back', ['action'=>'index'], ['class'=>['pull-right', 'fs12']]); ?>
  <?= h($post->title); ?>
</h1>

<p><?= nl2br(h($post->body)); ?></p>

Postの追加: NewEntity

<h1>
  <?= $this->Html->link('Add New', ['action'=>'add'], ['class'=>['pull-right', 'fs12']]); ?>
  Blog Posts
</h1>

  public function add()
  {
    $post = $this->Posts->newEntity();
    $this->set(compact('post'));
  }

Cakeのformヘルパー: src->template->view.ctp

<?= this->Form->create($post); ?>
<?= this->Form->input('title'); ?>
<?= this->Form->input('body', ['row'=>'3']); ?>
<?= this->Form->button('Add'); ?>

<?= this->Form->end(); ?>

データの入力

if ($this->request->is('post')){
      $post = $this->Posts->patchEntity($post, $this->request->data);
      $this->Posts->save($post);
      return $this->redirect(['action'=>'index']);
    }

validation:PostsTable.php

<?php

 namespace App\Model\Table;

 use Cake\ORM\Table;
 use Cake\Validation\Validator;

 class PostsTable extends Table
 {
   public function initialize(array $config)
   {
     $this->addBehavior('Timestamp');
   }
   public function validationDefault(Validator $validator)
   {
     $validator
       ->notEmpty('title')
       ->requirePresence('title')
       ->notEmpty('body')
       ->requirePresence('body')
       ->add('body', [
         'length' => [
           'rule' => ['minLength', 10],
           'message' => 'body length must be 10+'
         ]
       ]);
     return $validator;
   }
 }

PostsController

  public function add()
  {
    $post = $this->Posts->newEntity();
    if ($this->request->is('post')) {
      $post = $this->Posts->patchEntity($post, $this->request->data);
      if($this->Posts->save($post)){
        return $this->redirect(['action'=>'index']);
      } else {
      }
    }
    $this->set(compact('post'));
  }
}