Cakephp 2.3.1 HABTM编辑表单显示下拉框而不是多选框

我在舞者和舞者之间有一种HABTM的关系。除了在编辑我的舞蹈的edit.ctp上,CakePHP显示了一个下拉框,而不是我预期的多选框之外,一切似乎都如预期的那样。令我疯狂的是,多选框与编辑.ctp的工作方式相反,用于编辑Dancers!我不明白为什么它能以一种方式工作,但不能以另一种方式。

这是我的舞蹈模型,定义了舞蹈和舞者之间的关系:

    public $belongsTo = array(
        'User' => array(
            'className' => 'User',
            'foreignKey' => 'user_id',
            'conditions' => '',
            'fields' => '',
            'order' => ''
        )
    );

/**
 * hasAndBelongsToMany associations
 *
 * @var array
 */
    public $hasAndBelongsToMany = array(
        'Dancer' => array(
            'className' => 'Dancer',
            'joinTable' => 'dancers_dances',
            'foreignKey' => 'dance_id',
            'associationForeignKey' => 'dancer_id',
            'unique' => 'keepExisting',
        )
    );

这是我的舞蹈总监:

public function edit($id = null) {
    if (!$this->Dance->exists($id)) {
        throw new NotFoundException(__('Invalid dance'));
    }
    if ($this->request->is('post') || $this->request->is('put')) {
        if ($this->Dance->save($this->request->data)) {
            $this->Session->setFlash(__('The dance has been saved'));
            $this->redirect(array('action' => 'index'));
        } else {
            $this->Session->setFlash(__('The dance could not be saved. Please, try again.'));
        }
    } else {
        $options = array('conditions' => array('Dance.' . $this->Dance->primaryKey => $id));
        $this->request->data = $this->Dance->find('first', $options);
    }
    $users = $this->Dance->User->find('list');
    $dancers = $this->Dance->Dancer->find('list');
    $this->set(compact('users', 'dancers'));
}

这是我为舞蹈视图编辑的.ctp

<div class="dances form">
<?php echo $this->Form->create('Dance'); ?>
    <fieldset>
        <legend><?php echo __('Edit Dance'); ?></legend>
    <?php
        echo $this->Form->input('id');
        echo $this->Form->input('dance_name');
        echo $this->Form->input('users_id');
        echo $this->Form->input('Dancers');
    ?>
    </fieldset>
<?php echo $this->Form->end(__('Submit')); ?>
</div>
<div class="actions">
    <h3><?php echo __('Actions'); ?></h3>
    <ul>

        <li><?php echo $this->Form->postLink(__('Delete'), array('action' => 'delete', $this->Form->value('Dance.id')), null, __('Are you sure you want to delete # %s?', $this->Form->value('Dance.id'))); ?></li>
        <li><?php echo $this->Html->link(__('List Dances'), array('action' => 'index')); ?></li>
        <li><?php echo $this->Html->link(__('List Dancers'), array('controller' => 'dancers', 'action' => 'index')); ?> </li>
        <li><?php echo $this->Html->link(__('New Dancers'), array('controller' => 'dancers', 'action' => 'add')); ?> </li>
    </ul>
</div>

我认为相关表格如下: 舞者, 跳舞者跳舞, 舞蹈

在舞蹈表上,我有以下几列: 身份证件, dancer_id中, 舞蹈id

请告诉我更多信息是否有帮助。

提前谢谢。