orm - Kohana ORM 如果为空则打印

Question

可以说我有以下内容：

$categories = ORM::factory('category')->find_all();
foreach ($categories as $category) :
echo $category->category_title;
foreach ($category->posts->find_all() as $post) :
echo $post->post_title; 
endforeach;
endforeach;

它打印：

Category One
Post One
Category Two

Category Three
Post Two
Category Four
Post Three

差距意味着那里没有帖子。

我想要它打印的是：

Category One
Post One
Category Two
No Post
Category Three
Post Two
Category Four
Post Three

所以基本上我想要：

foreach ($posts->find_all() as $post) :
if post exists
echo $post->post_title; 
else
No Post
endforeach;

我怎么做？

Answer 1

我假设您使用的是 Kohana 3.2 和 ORM。

查看指南： http: //kohanaframework.org/3.2/guide/orm/using

有一个部分叫做检查 ORM 加载了一条记录

if ($post->loaded())
{
    echo $post->post_title;
}
else
{
    echo 'No Post';
}

包括更新问题的类别：

$categories = ORM::factory('category')->find_all();
foreach ($categories as $category)
{
    $posts = $category->posts->find_all();
    if (count($posts) > 0)
    {
        echo $category->category_title;
        foreach ($posts as $post)
        {
            echo $post->post_title; 
        }
    }
    else
    {
        echo 'No Posts';
    }
}