cakephp：我如何在我的下拉列表中顯示默認值？

Question

我想顯示像 '請選擇類別' 默認值insted的的布蘭克空間

這裏是我的表

category_tbls

• id
• cat_name

個

subcategory_tbls

• id
• category_tbls_id
• sub_cat

模型 Addcat.php

class Addcat extends AppModel 
{ 
    public $name = 'category_tbls'; 
    public $hashMany = 'subcategory_tbls'; 
} 

模型 Subcat.php

class Subcat extends AppModel 
{ 
    public $name = 'subcategory_tbls'; 
    public $belongsTo = 'category_tbls'; 
} 

AdminController.php

public function subcat() 
{ 
    $this->loadModel("Subcat"); 

    if($this->Subcat->save($this->request->data)) 
    { 
     $this->Session->setFlash('Successully save your information!'); 
    } 

    $this->loadModel("Addcat"); 
    $dt=$this->Addcat->find('list',array('fields'=>array('id','cat_name'))); 
    $this->set('drop',$dt); 

視圖文件是如波紋管

subcat.ctp

<h2>Add Sub Category!</h2> 
        <form action="subcat" method="post"> 
        <?php echo $this->Form->select('category_tbls_id',$drop);?> 
         <input type="text" name="sub_cat" placeholder="sub category name" required/> 

         <button type="submit" class="b1">Add Sub Category</button> 
        </form> 

Answer 1

您需要在您的選擇功能中添加3rd parameter。如果您不希望顯示在您的dropdownempty值：

<?php echo $this->Form->select('category_tbls_id',$drop,array('empty' => 'Select Category'));?>