【index.ctp】と【TopicsController】【Topic.php】のソースを記載します

index.ctp

<div class="topics index">
    <h2><?php echo __('Topics'); ?></h2>
    <table cellpadding="0" cellspacing="0">
    <thead>
    <tr>
            <th><?php echo $this->Paginator->sort('id'); ?></th>
            <th><?php echo $this->Paginator->sort('title'); ?></th>
            <th><?php echo $this->Paginator->sort('body'); ?></th>
            <th><?php echo $this->Paginator->sort('category_id'); ?></th>
            <th><?php echo $this->Paginator->sort('created'); ?></th>
            <th><?php echo $this->Paginator->sort(' modified'); ?></th>
            <th class="actions"><?php echo __('Actions'); ?></th>
    </tr>
    </thead>
    <tbody>
    <?php foreach ($topics as $topic): ?>
    <tr>
        <td><?php echo h($topic['Topic']['id']); ?>&nbsp;</td>
        <td><?php echo h($topic['Topic']['title']); ?>&nbsp;</td>
        <td><?php echo h($topic['Topic']['body']); ?>&nbsp;</td>
        <td>
            <?php echo $this->Html->link($topic['Category']['name'], array('controller' => 'categories', 'action' => 'view', $topic['Category']['id'])); ?>
        </td>
        <td><?php echo h($topic['Topic']['created']); ?>&nbsp;</td>
        <td><?php echo h($topic['Topic']['modified']); ?>&nbsp;</td>
        <td class="actions">
            <?php echo $this->Html->link(__('View'), array('action' => 'view', $topic['Topic']['id'])); ?>
            <?php echo $this->Html->link(__('Edit'), array('action' => 'edit', $topic['Topic']['id'])); ?>
            <?php echo $this->Form->postLink(__('Delete'), array('action' => 'delete', $topic['Topic']['id']), array(), __('Are you sure you want to delete # %s?', $topic['Topic']['id'])); ?>
        </td>
    </tr>
<?php endforeach; ?>
    </tbody>
    </table>
    <p>
    <?php
    echo $this->Paginator->counter(array(
    'format' => __('Page {:page} of {:pages}, showing {:current} records out of {:count} total, starting on record {:start}, ending on {:end}')
    ));
    ?>    </p>
    <div class="paging">
    <?php
        echo $this->Paginator->prev('< ' . __('previous'), array(), null, array('class' => 'prev disabled'));
        echo $this->Paginator->numbers(array('separator' => ''));
        echo $this->Paginator->next(__('next') . ' >', array(), null, array('class' => 'next disabled'));
    ?>
    </div>
</div>
<div class="actions">
    <h3><?php echo __('Actions'); ?></h3>
    <ul>
        <li><?php echo $this->Html->link(__('New Topic'), array('action' => 'add')); ?></li>
        <li><?php echo $this->Html->link(__('List Categories'), array('controller' => 'categories', 'action' => 'index')); ?> </li>
        <li><?php echo $this->Html->link(__('New Category'), array('controller' => 'categories', 'action' => 'add')); ?> </li>
        <li><?php echo $this->Html->link(__('List Comments'), array('controller' => 'comments', 'action' => 'index')); ?> </li>
        <li><?php echo $this->Html->link(__('New Comment'), array('controller' => 'comments', 'action' => 'add')); ?> </li>
    </ul>
</div>

TopicsController

<?php
App::uses('AppController', 'Controller');
/**
 * Topics Controller
 *
 * @property Topic $Topic
 * @property PaginatorComponent $Paginator
 */
class TopicsController extends AppController {

/**
 * Components
 *
 * @var array
 */
    public $components = array('Paginator');

/**
 * index method
 *
 * @return void
 */
    public function index() {
        $this->Topic->recursive = 0;
        $this->set('topics', $this->Paginator->paginate());
    }

/**
 * view method
 *
 * @throws NotFoundException
 * @param string $id
 * @return void
 */
    public function view($id = null) {
        if (!$this->Topic->exists($id)) {
            throw new NotFoundException(__('Invalid topic'));
        }
        $options = array('conditions' => array('Topic.' . $this->Topic->primaryKey => $id));
        $this->set('topic', $this->Topic->find('first', $options));
    }

/**
 * add method
 *
 * @return void
 */
    public function add() {
        if ($this->request->is('post')) {
            $this->Topic->create();
            if ($this->Topic->save($this->request->data)) {
                $this->Session->setFlash(__('The topic has been saved.'));
                return $this->redirect(array('action' => 'index'));
            } else {
                $this->Session->setFlash(__('The topic could not be saved. Please, try again.'));
            }
        }
        $categories = $this->Topic->Category->find('list');
        $this->set(compact('categories'));
    }

/**
 * edit method
 *
 * @throws NotFoundException
 * @param string $id
 * @return void
 */
    public function edit($id = null) {
        if (!$this->Topic->exists($id)) {
            throw new NotFoundException(__('Invalid topic'));
        }
        if ($this->request->is(array('post', 'put'))) {
            if ($this->Topic->save($this->request->data)) {
                $this->Session->setFlash(__('The topic has been saved.'));
                return $this->redirect(array('action' => 'index'));
            } else {
                $this->Session->setFlash(__('The topic could not be saved. Please, try again.'));
            }
        } else {
            $options = array('conditions' => array('Topic.' . $this->Topic->primaryKey => $id));
            $this->request->data = $this->Topic->find('first', $options);
        }
        $categories = $this->Topic->Category->find('list');
        $this->set(compact('categories'));
    }

/**
 * delete method
 *
 * @throws NotFoundException
 * @param string $id
 * @return void
 */
    public function delete($id = null) {
        $this->Topic->id = $id;
        if (!$this->Topic->exists()) {
            throw new NotFoundException(__('Invalid topic'));
        }
        $this->request->allowMethod('post', 'delete');
        if ($this->Topic->delete()) {
            $this->Session->setFlash(__('The topic has been deleted.'));
        } else {
            $this->Session->setFlash(__('The topic could not be deleted. Please, try again.'));
        }
        return $this->redirect(array('action' => 'index'));
    }
}

Topic.php

<?php
App::uses('AppModel', 'Model');
/**
 * Topic Model
 *
 * @property Category $Category
 * @property Comment $Comment
 */
class Topic extends AppModel {

/**
 * Validation rules
 *
 * @var array
 */
    public $validate = array(
        'title' => array(
            'notEmpty' => array(
                'rule' => array('notEmpty'),
                //'message' => 'Your custom message here',
                //'allowEmpty' => false,
                //'required' => false,
                //'last' => false, // Stop validation after this rule
                //'on' => 'create', // Limit validation to 'create' or 'update' operations
            ),
        ),
        'body' => array(
            'notEmpty' => array(
                'rule' => array('notEmpty'),
                //'message' => 'Your custom message here',
                //'allowEmpty' => false,
                //'required' => false,
                //'last' => false, // Stop validation after this rule
                //'on' => 'create', // Limit validation to 'create' or 'update' operations
            ),
        ),
        'category_id' => array(
            'numeric' => array(
                'rule' => array('numeric'),
                //'message' => 'Your custom message here',
                //'allowEmpty' => false,
                //'required' => false,
                //'last' => false, // Stop validation after this rule
                //'on' => 'create', // Limit validation to 'create' or 'update' operations
            ),
        ),
        'modified' => array(
            'datetime' => array(
                'rule' => array('datetime'),
                //'message' => 'Your custom message here',
                //'allowEmpty' => false,
                //'required' => false,
                //'last' => false, // Stop validation after this rule
                //'on' => 'create', // Limit validation to 'create' or 'update' operations
            ),
        ),
    );

    //The Associations below have been created with all possible keys, those that are not needed can be removed

/**
 * belongsTo associations
 *
 * @var array
 */
    public $belongsTo = array(
        'Category' => array(
            'className' => 'Category',
            'foreignKey' => 'category_id',
            'conditions' => '',
            'fields' => '',
            'order' => ''
        )
    );

/**
 * hasMany associations
 *
 * @var array
 */
    public $hasMany = array(
        'Comment' => array(
            'className' => 'Comment',
            'foreignKey' => 'topic_id',
            'dependent' => false,
            'conditions' => '',
            'fields' => '',
            'order' => '',
            'limit' => '',
            'offset' => '',
            'exclusive' => '',
            'finderQuery' => '',
            'counterQuery' => ''
        )
    );

}