>我正在尝试学习如何访问和显示信息。我有类别、论坛、主题和帖子。论坛属于类别，主题属于论坛，帖子属于主题。我不知道如何访问帖子。
表：
categories {category_id, category_title}
forums {forum_id, forum_title}
categories_forums {id_category, id_forum}
topics {topic_id, topic_title}
forums_topics{id_forum, id_topic}
posts {post_id, post title}
topics_posts {id_topic, id_post}
模型：
class Model_Category extends ORM {
protected $_primary_key = 'category_id';
protected $_has_many = array(
'forums'=> array(
'model' => 'forum',
'through' => 'categories_forums',
'far_key' => 'id_forum',
'foreign_key' => 'id_category'
),
);
}
class Model_Forum extends ORM {
protected $_primary_key = 'forum_id';
protected $_belongs_to = array(
'categories'=> array(
'model' => 'category',
'through' => 'categories_forums',
'far_key' => 'id_category',
'foreign_key' => 'id_forum'
),
);
protected $_has_many = array(
'topics'=> array(
'model' => 'topic',
'through' => 'forums_topics',
'far_key' => 'id_topic',
'foreign_key' => 'id_forum'
),
);
}
class Model_Topic extends ORM {
protected $_primary_key = 'topic_id';
protected $_belongs_to = array(
'forums'=> array(
'model' => 'forum',
'through' => 'forums_topics',
'far_key' => 'id_forum',
'foreign_key' => 'id_topic'
),
);
protected $_has_many = array(
'posts'=> array(
'model' => 'post',
'through' => 'topics_posts',
'far_key' => 'id_post',
'foreign_key' => 'id_topic'
),
);
}
class Model_Post extends ORM {
protected $_primary_key = 'post_id';
protected $_belongs_to = array(
'topics'=> array(
'model' => 'topic',
'through' => 'topics_posts',
'far_key' => 'id_topic',
'foreign_key' => 'id_post'
),
);
}
到目前为止，我有以下内容：
foreach ($categories as $category) :
echo $category->category_title;
foreach ($category->forums->find_all() as $forum) :
echo $forum->forum_title;
$num_topics = $forum->topics->count_all(); echo $num_topics;
$num_posts = $forum->topics->posts->count_all(); echo $num_posts;
endforeach;
endforeach;
问题是回显$num_posts 显示 0。我猜我访问的帖子是错误的。我该怎么做？
- 您必须迭代
topics才能获取帖子。 - 经过一
count_all()，Kohana重置了模型。
您必须这样做：
$topics = $forum->topics->find_all()->as_array();
$num_topics = count($topics);
foreach($topics as $topic)
{
$num_post_in_topic = $topic->posts->find_all()->count();
}