Question

我目前正在尝试传递变量以像where子句一样操作，因此我可以将其传递给URL并显示页面上每个事件的内容。

为此，我需要传递event_id。

public function exportSearch($event_id){

        $query = "SELECT
                    u.prefix AS  'Title', 
                    u.forename AS  'Forename', 
                    u.surname AS  'Surname', 
                    u.telephone AS 'Mobile Number',
                    u.email AS  'Email Address', 
                    ea.checkin_status_id AS 'checked in',
                    u.update_time AS  'Register Date', 
                    eg.name AS 'Event Group Registered', 
                    e.name AS  'Session Registered', 
                    u.bio AS 'User Information',
                    u.dob AS 'Date of Birth',
                    u.company AS 'Company',
                    u.company_role AS 'Company Role',
                    CONCAT(u2.forename, ' ', u2.surname) AS 'Guest of',
                    MAX(CASE WHEN uv.user_type_variables_id = 1 THEN uv.value ELSE NULL END) AS Question1,
                    MAX(CASE WHEN uv.user_type_variables_id = 2 THEN uv.value ELSE NULL END) AS Question2,
                    MAX(CASE WHEN uv.user_type_variables_id = 3 THEN uv.value ELSE NULL END) AS Question3,
                    MAX(CASE WHEN uv.user_type_variables_id = 4 THEN uv.value ELSE NULL END) AS Question4,
                    MAX(CASE WHEN uv.user_type_variables_id = 5 THEN uv.value ELSE NULL END) AS Question5,
                    MAX(CASE WHEN uv.user_type_variables_id = 6 THEN uv.value ELSE NULL END) AS Question6

                    FROM tbl_event_attendees AS ea

                    LEFT JOIN tbl_user AS u ON ea.user_id = u.id
                    LEFT JOIN tbl_event AS e ON ea.event_id = e.id
                    LEFT JOIN tbl_event_groups AS eg on e.group_id = eg.id
                    LEFT JOIN tbl_user AS u2 ON ea.guest_of_user_id = u2.id
                    LEFT JOIN tbl_user_variables AS uv on u.id = uv.user_id


                    GROUP BY ea.id";

           // $query->params([':event_id' => $event_id]);

        $count=Yii::app()->db->createCommand($query)->queryScalar();
        return $sqlDataprovider = new CSqlDataProvider($query, array(
                'totalItemCount'=>$count,
                'sort'=>array(
                    'attributes'=>array(
                       // 'event_name'=>Event::model()->getAttributeLabel('name'), // csv of sortable column names
                        //'Question1' => EventAttendees::model()->getAttributeLabel('Question1'),
                        // 'Forename',

                    )
                ),
                 'pagination'=>array(
                 'pageSize'=>$count, //Show all records
        ),
            ));
     }

我的想法是使用$ query-＆gt; params来执行此操作，然后将其扔到视图中但没有运气。

它需要显示类似WHERE ea.event_id = $ event_id的东西，但我似乎无法通过原始sql传递它。

Answer 1

您需要在SQL中添加WHERE子句，如下所示： WHERE ea.event_id = :event_id。请记住，您的$query变量只包含SQL，因此这是一个字符串，而不是类似于查询对象。

要将参数传递给queryScalar()函数，您需要传递一个包含参数的数组。根据{{3}}：

$count = Yii::app()->db->createCommand($query)->queryScalar(array(
    ':event_id'=>$event_id
));

注意：

文档说：

执行SQL语句并返回第一列的值在第一行数据。这是一种方便查询的方法只需要一个标量值（例如，获得计数值）记录）。

因此，您的第一列u.prefix AS 'Title'是字符串。将其用作$count不是一个好的解决方案。我建议编写一个用于获取行数的SQL，另一个用于获取将传递给CSqlDataProvider的数据。

Answer 2

sql应该是这个

    "SELECT
                u.prefix AS  'Title', 
                u.forename AS  'Forename', 
                u.surname AS  'Surname', 
                u.telephone AS 'Mobile Number',
                u.email AS  'Email Address', 
                ea.checkin_status_id AS 'checked in',
                u.update_time AS  'Register Date', 
                eg.name AS 'Event Group Registered', 
                e.name AS  'Session Registered', 
                u.bio AS 'User Information',
                u.dob AS 'Date of Birth',
                u.company AS 'Company',
                u.company_role AS 'Company Role',
                CONCAT(u2.forename, ' ', u2.surname) AS 'Guest of',
                MAX(CASE WHEN uv.user_type_variables_id = 1 THEN uv.value ELSE NULL END) AS Question1,
                MAX(CASE WHEN uv.user_type_variables_id = 2 THEN uv.value ELSE NULL END) AS Question2,
                MAX(CASE WHEN uv.user_type_variables_id = 3 THEN uv.value ELSE NULL END) AS Question3,
                MAX(CASE WHEN uv.user_type_variables_id = 4 THEN uv.value ELSE NULL END) AS Question4,
                MAX(CASE WHEN uv.user_type_variables_id = 5 THEN uv.value ELSE NULL END) AS Question5,
                MAX(CASE WHEN uv.user_type_variables_id = 6 THEN uv.value ELSE NULL END) AS Question6

                FROM tbl_event_attendees AS ea

                LEFT JOIN tbl_user AS u ON ea.user_id = u.id
                LEFT JOIN tbl_event AS e ON ea.event_id = e.id
                LEFT JOIN tbl_event_groups AS eg on e.group_id = eg.id
                LEFT JOIN tbl_user AS u2 ON ea.guest_of_user_id = u2.id
                LEFT JOIN tbl_user_variables AS uv on u.id = uv.user_id 

                WHERE ea.id = " . $event_id . " 

                GROUP BY ea.id"

通过原始sql传递变量 - Yii

2 个答案: