Question

假设我有以下内容：

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

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。

我想要打印的是：

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

基本上我想要：

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

我该怎么做？

Answer 1

我假设你正在使用Kohana 3.2和ORM。

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

有一个名为检查ORM是否已加载记录

的部分

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

包括更新问题中的类别：

$categories = ORM::factory('category')->find_all();
foreach ($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';
    }
}

Kohana ORM如果空的话打印

1 个答案: