Question

我想用Yii关系创建一个查询。这是我的关系：

//Articles model
return array(
            'articlesHasTags' => array(self::HAS_MANY, 'ArticlesHasTag', 'articles_id',
                            "with"=>"tag",
                            ),
                            ),
//ArticlesHasTag model
        return array(
            'articles' => array(self::BELONGS_TO, 'Articles', 'articles_id'),
            'tag' => array(self::BELONGS_TO, 'Tag', 'tag_id'),
        );

这是查询：

  $blog = Articles::model()->with(array("articlesHasTags"))->findAllByAttributes(array(),array(
        "condition"=>"t.del = 0 AND t.active = 1 AND articlesHasTags.tag_id = {$tag->id}",
        'order'=>"t.publish_start DESC",
        "limit"=>10,
    ));

在我获得$tag->id之前。

错误消息是：

未知栏目＆＃39; articlesHasTags.tag_id＆＃39;

我认为这种关系很好，因为我可以在没有这种关系的情况下使用它＆＃34; articlesHasTags.tag_id = {$tag->id}＆＃34;

我将关系名称更改为表名。然后完整的错误消息是：

CDbCommand无法执行SQL语句：SQLSTATE [42S22]：未找到列：1054未知列＆＃39; articles_has_tag.tag_id＆＃39;在＆＃39; where where＆＃39;。执行的SQL语句是：SELECT t。id AS t0_c0，t。active AS t0_c1，t。publish_start AS t0_c2， t。publish_start_local AS t0_c3，t。create_time AS t0_c4， t。last_modify AS t0_c5，t。title AS t0_c6，t。url AS t0_c7，t。short_desc AS t0_c8，t。content AS t0_c9， t。image AS t0_c10，t。comment AS t0_c11，t。hightlight AS t0_c12，t。vote AS t0_c13，t。type AS t0_c14， t。users_id AS t0_c15，t。newspaper_id AS t0_c16，t。del AS t0_c17，t。region_id AS t0_c18，t。language_id AS t0_c19，t。adult AS t0_c20，users。id AS t1_c0， users。email AS t1_c1，users。password AS t1_c2， users。author_name AS t1_c3，users。location AS t1_c4， users。last_login AS t1_c5，users。active AS t1_c6， users。remember_me AS t1_c7，users。rank AS t1_c8， users。paypal_acc AS t1_c9，users。url AS t1_c10， users。about_me AS t1_c11，users。image AS t1_c12， users。facebook AS t1_c13，users。google AS t1_c14， users。del AS t1_c15，users。admin_active AS t1_c16， users。create_time AS t1_c17，users。first_name AS t1_c18， users。last_name AS t1_c19，newspaper。id AS t4_c0， newspaper。name AS t4_c1，newspaper。create_time AS t4_c2， newspaper。type AS t4_c3，newspaper。active AS t4_c4， newspaper。url AS t4_c5，newspaper。location AS t4_c6， newspaper。newspaper_category_id AS t4_c7 FROM articles t LEFT OUTER JOIN users users ON（t。users_id = users。id）LEFT 外部加入newspaper newspaper开启（t。newspaper_id = newspaper。id）WHERE（t.del = 0 AND t.active = 1 AND articles_has_tag.tag_id = 42）ORDER BY t.publish_start DESC 限制10

这是articles_has_tag表

CREATE TABLE IF NOT EXISTS `articles_has_tag` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `articles_id` int(11) DEFAULT NULL,
  `tag_id` int(11) DEFAULT NULL,
  `date` datetime DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `fk_articles_has_tag_tag1_idx` (`tag_id`),
  KEY `fk_articles_has_tag_articles1_idx` (`articles_id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=93 ;

Answer 1

为什么你没有使用findAll？你把一切都放在了条件在你的SQL中要提到的第二件事是你没有关系文章哈斯标签。

你可以试试这个。

$blog = Articles::model()
   ->with("articlesHasTags" => array(
       'alias' => 'articlesHasTags',
       'together' => true, //join in single query
       'condition' => "articlesHasTags.tag_id = {$tag->id}"//may be use param?
   ))->findAll(array(
       "condition"=>"t.del = 0 AND t.active = 1",
       'order'=>"t.publish_start DESC",
       "limit"=>10,
   ));

Answer 2

已更新： 试试这个。

$blog = Articles::model()->with(array('articlesHasTags' => array(
         'alias'=>'articleHTag', 'condition' => "articleHTag.tag_id = ".$tag->id)))->findAllByAttributes(array(),array(
        "condition"=>"t.del = 0 AND t.active = 1",
        'order'=>"t.publish_start DESC",
        "limit"=>10,
    ));

为什么我不能在yii项目中使用关系进行此查询？

2 个答案: