Question

我有这张表：

Careeer { id(pk) , name}
Student { email (pk), ...}
Career_Student { student_email(pk)(fk), career_id (pk)(fk), semester }

在我的Yii模型中，我有这种关系

'careers' => array(self::MANY_MANY, 'Career', 'Career_Student(student_email, career_id)')

最后我有了这个查询

$criteria = new CDbCriteria();
$params = array (':email' => $_SESSION['USER']);
$criteria->addCondition("email=:email");
$criteria->params = $params;
$result = Student::model()->find($criteria);
$careers=$result->careers;

我的问题是Yii没有检索我的$ careers变量中的“semester”列。

¿我该怎么做？

提前谢谢！

Answer 1

您可以将MANY_MANY关系表示为与through选项相关联的两个HAS_MANY关系的组合：

'career_student' => array(self::HAS_MANY,'Carrer_Student','student_email'),
'careers' => array(self::HAS_MANY,'Career', 'career_id','through'=>'career_student'),

还要确保在career模型中为Career_Student定义关系：

'career' => array(self::BELONGS_TO, 'Career', 'career_id'),

现在，当您查询学生with('careers')时，将填充两个关系：

$criteria->with = 'carreers';
$result = Student::model()->findAll($criteria);
foreach($student->career_student as $careerStudent) {
    // You have access to the bridge table ...
    echo $careerStudent->semester;

    // ... and the connected career table
    echo $careerStudent->career->name;
}

Yii得到许多桥表得到所有列

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