Kohana ORM关系

Question

我正试图掌握Kohana ORM，但我有点陷入困境。 我创建了类别和帖子模型，其关系基于category_id。

我可以单独获取帖子和类别模型，但我似乎无法使用关系获取它们。例如：

// Get first category
$category = ORM::factory('category', 1); 

foreach ($category->posts as $post)
{
    echo $post->title;                
}

以上只是给我一个空白屏幕（我知道我不应该在控制器中输出任何东西，只是试图让它先工作）。

print_r($category); 

给我这个：

Model_Category Object（[_has_many：protected] =＆gt; Array（[posts] =＆gt; Array（[model] =＆gt; post [foreign_key] =＆gt; category_id [through] =＆gt; [far_key] =＆gt; post_id））[_ has_one：protected] =＆gt; Array（）[_ belongs_to：protected] =＆gt; Array（）[_ load_with：protected] =＆gt; Array（）[_ validate：protected] =＆gt; [_rules：protected] = ＆gt; Array（）[_ callbacks：protected] =＆gt; Array（）[_filters：protected] =＆gt; Array（）[_ label：protected] =＆gt; Array（）[_ object：protected] =＆gt;数组（[id ] =＆gt; 1 [title] =＆gt; [description] =＆gt;）[_ changed：protected] =＆gt; Array（）[_related：protected] =＆gt; Array（）[_ loaded：protected] =＆gt; [_saved ：protected] =＆gt; 1 [_sorting：protected] =＆gt;数组（[id] =＆gt; ASC）[_ foreign_key_suffix：protected] =＆gt; _id [_object_name：protected] =＆gt;类别[_object_plural：protected] =＆gt ; categories [_table_name：protected] =＆gt; categories [_table_columns：protected] =＆gt; Array（[id] =＆gt; Array（[type] =＆gt; int [min] =＆gt; 0 [max] =＆g吨; 65535 [column_name] =＆gt; id [column_default] =＆gt; [data_type] =＆gt; smallint unsigned [is_nullable] =＆gt; [ordinal_position] =＆gt; 1 [显示] =＆gt; 6 [评论] =＆gt; [extra] =＆gt; auto_increment [key] =＆gt; PRI [privileges] =＆gt;选择，插入，更新，引用）[title] =＆gt;数组（[type] =＆gt; string [character_maximum_length] =＆gt; 65535 [column_name] =＆gt; title [column_default] =＆gt; [data_type] =＆gt; text [is_nullable] =＆gt; [ordinal_position] =＆gt; 2 [ collat​​ion_name] =＆gt; latin1_swedish_ci [comment] =＆gt; [extra] =＆gt; [key] =＆gt; [privileges] =＆gt; select，insert，update，references）[description] =＆gt;数组（[type] =＆gt; string [character_maximum_length] =＆gt; 65535 [column_name] =＆gt; description [column_default] =＆gt; [data_type] =＆gt; text [is_nullable] =＆gt; [ordinal_position] =＆gt; 3 [ collat​​ion_name] =＆gt; latin1_swedish_ci [comment] =＆gt; [extra] =＆gt; [key] =＆gt; [privileges] =＆gt; select，insert，update，references））[_ signored_columns：protected] =＆gt; Array（）[_ update_column：protected] =＆gt; [_created_column：protected] =＆gt; [_primary_key：protected] =＆gt; id [_primary_val：protected] =＆gt; name [_table_names_plural：protected] =＆gt; 1 [_reload_on_wakeup：protected] =＆gt; 1 [_db：protected] =＆gt; Database_MySQL对象（[_connection_id：protected] =＆gt; d6ad44aa068ae69071b9614f2a4a760bf55d9307 [_identifier：protected] =＆gt; [last_query] => SHOW FULL COLUMNS FROM categories` [_instance：protected] =＆gt;默认[_connection：protected] =＆gt;资源ID＃36 [_config ：protected] =＆gt;数组（[type] =＆gt; mysql [连接] =＆gt;数组（[hostname] =＆gt; localhost [数据库] =＆gt; cms_test_kohana [persistent] =＆gt;）[table_prefix] =＆gt; [charset] =＆gt; utf8 [缓存] =＆gt; [profiling] =＆gt; 1））[_ db_applied：protected] =＆gt; Array（）[_ db_pending：protected] =＆gt; Array（）[_ db_reset：protected] =＆gt; 1 [_db_builder：protected] =＆gt; [_with_applied：protected] =＆gt; Array（）[_ preload_data：protected] =＆gt; Array（））

有人可以帮忙吗？

任何建议表示赞赏。

感谢。

Answer 1

帖子是一种关系，而不是一个集合。在关系上使用find_all（）或find（）可返回记录集合。

foreach ($category->posts->find_all() as $post) {
    echo $post->title;                
}

您还可以对关系应用各种其他方法，以使用orderby，where等来过滤返回的结果...