codeigniter - callback_column 不适用于 Grocery Grocery 中的连接表

Question

我正在尝试使用 callback_column 更改列值功能。

$crud = new grocery_CRUD();
$crud -> set_table('booking');
//$crud->set_relation('room_id','rooms','name');
$crud->callback_column('room_id',array($this,'_visitor_details_popup')); 

此代码运行良好( _visitor_details_popup 函数返回值 room_id )

$crud = new grocery_CRUD();
$crud -> set_table('booking');
$crud->set_relation('room_id','rooms','name');
$crud->callback_column('room_id',array($this,'_visitor_details_popup'));

此代码运行不正常( room_id 未更改)

public function _visitor_details_popup($value, $row)
{

    $visitor_details=explode(',',$value);
    return '<a href="#">Name'.$visitor_details[1].'<a>'.'<div class="popup_content">Address'.$visitor_details[2].'Email'.$visitor_details[3].'</div>;
}

这是杂货杂货中的错误吗？？有什么棘手的解决方法吗？？

Answer 1

我有窍门。创建一个函数并在 callback_column 参数上调用它..

$crud = new grocery_CRUD();
$crud -> set_table('booking');
$crud->set_relation('room_id','rooms','name');
$crud->callback_column(unique_field_name('room_id'),array($this,'_visitor_details_popup')); verity 

function unique_field_name($field_name) 
{
    return 's'.substr(md5($field_name),0,8); //This s is because is better for a string to begin               with a letter and not with a number
}