我想在Yii中使用join进行查询。但是发生的事情是我得到了一个内部服务器 错误。我想通过它的标签组执行搜索项目的查询。
这是我想用yii执行的查询:
select i.id as id, i.title as title, i.content as content from tbl_tags t
join tbl_items i on t.item_id = i.id
where t.tag_group_id = (value) and i.item_id = (value)
group by t.ref_id;
这就是我在Yii中使用CDbCriteria
:
public function getItemsListByTagGroup( . . .){
$criteria = new CDbCriteria;
$criteria->select = 'i.id as id, i.title as title, i.content as content i.date_updated as date_updated';
$criteria->join = 'join tbl_tag t on i.id = t.item_id';
$criteria -> addCondition('t.tag_group_id = ' . $tag_group_id);
$criteria -> addCondition('t.reference_type = ' . $ref_type);
$criteria -> addCondition('t.tag_group_id = ' . $id);
$criteria -> addCondition('i.item_type = ' . $item_type);
$criteria -> addCondition('i.item_id = ' .$item_id);
$criteria -> addCondition('i.status = "active"');
$item_list = Items::model() -> findAll($criteria);
$item_list_data = array();
foreach ($templates_list as $listdata => $data) {
$columns = array();
$columns['Title'] = $data['title'];
$columns['Content'] = $data['content'];
$columns['Date Updated'] = $data['date_updated'];
$columns['id'] = $data['id'];
$item_list_data[] = $columns;
}
return $item_list_data;
}
顺便生成模型。
但我不知道我想念的是什么。 有什么可以帮忙吗? 非常感谢任何想法。
答案 0 :(得分:0)
列的别名为 t ,因此对于指向ID列,您应该 t.id,t.title,.. 强> 毕竟你应该指定连接类型,
我建议使用第一种方法:
$result = Yii::app()->db->createCommand()
->select('i.id as id, i.title as title, i.content as content')
->from('tbl_tags t')
->join('tbl_items i' , 't.item_id = i.id')
->where('t.tag_group_id = :value1' , array(':value1' => $value1))
->andWhere('i.item_id = :value2' , array('value2' => $value2))
->group('t.ref_id')->queryAll(); // this will be returned as an array of arrays
第二
,当您获取具有活动记录的数据时,您无法获取数据,因为另一列不在模型属性列表中,请尝试此
public function getItemsListByTagGroup( . . .){
$criteria = new CDbCriteria;
$criteria->select = 'i.id , i.title , i.content , i.date_updated'; // if these columns are not in model, won't get fetched
$criteria->join = 'INNER JOIN tbl_items i on i.id = t.item_id'; // incorrect table join was in here
$criteria -> addCondition('t.tag_group_id = ' . $tag_group_id);
$criteria -> addCondition('t.reference_type = ' . $ref_type);
$criteria -> addCondition('t.tag_group_id = ' . $id);
$criteria -> addCondition('i.item_type = ' . $item_type);
$criteria -> addCondition('i.item_id = ' .$item_id);
$criteria -> addCondition('i.status = "active"');
$item_list = Items::model() -> findAll($criteria); // this will be fetched as an array of objects
$item_list_data = array();
foreach ($templates_list as $listdata => $data) {
$columns = array();
$columns['Title'] = $data->title;
$columns['Content'] = $data->content;
$columns['Date Updated'] = $data->date_updated;
$columns['id'] = $data->id;
$item_list_data[] = $columns;
}
return $item_list_data;
}