Yii与主键的关系活动记录

Question

我有两个表：

学生

ID，名称，电子邮件等。

主题（具有外键student_ibfk_1）

id，student_id，subject_id，分数

我定义了两个模型：

class Student extends CActiveRecord{

    public static function model($className=__CLASS__)
    {
        return parent::model($className);
    }
    ....
    ....
    public function relations()
    {
    // NOTE: you may need to adjust the relation name and the related
    // class name for the relations automatically generated below.
    return array(
        'subjectMember' => array(self::MANY_MANY, 'Subject', array('id'=>'student_id')),
    }
}

class Subject extends CActiveRecord{

    public static function model($className=__CLASS__)
    {
        return parent::model($className);
    }
    ....
    ....
    public function relations()
    {
    // NOTE: you may need to adjust the relation name and the related
    // class name for the relations automatically generated below.
    return array(
        'subjectMember' => array(self::BELONGS_TO, 'Student', 'student_ibfk_1(id)'),
    }
}

我想使用关系为使用AR模型的科目的学生获取分数。

我称其为：

$criteria = new CDbCriteria();
$criteria->condition='`t`.`name`=:name AND `eventMember`.`subject_id`=:subject_id';
$criteria->params=array(':name'=>$name, ':subject_id'=>$subject_id);
$avc = Student::model()->with('subjectMember')->fetchAll($criteria);

而且我收到一个错误。

preg_match（）期望参数2为字符串，给定数组

你能告诉我，我要去哪里错了？ 我正在关注Yii文档http://www.yiiframework.com/doc/api/1.1/CActiveRecord#relations-detail

EDIT1 ：我也尝试过

班级学生扩展CActiveRecord {

    public static function model($className=__CLASS__)
    {
        return parent::model($className);
    }
    ....
    ....
    public function relations()
    {
    // NOTE: you may need to adjust the relation name and the related
    // class name for the relations automatically generated below.
    return array(
        'subjectMember' => array(self::MANY_MANY, 'Subject', 'subject(student_ibfk_1)'),
    }
}

class Subject extends CActiveRecord{

    public static function model($className=__CLASS__)
    {
        return parent::model($className);
    }
    ....
    ....
    public function relations()
    {
    // NOTE: you may need to adjust the relation name and the related
    // class name for the relations automatically generated below.
    return array(
        'subjectMember' => array(self::BELONGS_TO, 'Student', 'id'),
    }
}

这给了我错误：

在活动记录类“主题”中的关系“主题”由无效的外键指定。 外键的格式必须为“ joinTable（fk1，fk2，...）”。

Answer 1

您必须命名外键字段，而不是外键名称。 所以应该

return array(
    'subjectMember' => array(self::BELONGS_TO, 'Student', 'id'),
}

但您可以省略id ，因为它默认为id ：

return array(
    'subjectMember' => array(self::BELONGS_TO, 'Student'),
}

在mysql中创建所有外部关系，然后使用gii创建模型更加容易。 它将为您创建所有关系。

Answer 2

尝试

class Student extends CActiveRecord{

    public static function model($className=__CLASS__)
    {
        return parent::model($className);
    }
    ....
    ....
    public function relations()
    {
    // NOTE: you may need to adjust the relation name and the related
    // class name for the relations automatically generated below.
    return array(
        'subjectMember' => array(self::HAS_MANY, 'Subject', 'student_id'),
    }
}

class Subject extends CActiveRecord{

    public static function model($className=__CLASS__)
    {
        return parent::model($className);
    }
    ....
    ....
    public function relations()
    {
    // NOTE: you may need to adjust the relation name and the related
    // class name for the relations automatically generated below.
    return array(
        'subjectMember' => array(self::BELONGS_TO, 'Student', 'id'),
    }
}

你俩的关系都错了。

然后根据您的条件调用eventMember.subject_id

$criteria->condition='`t`.`name`=:name AND `eventMember`.`subject_id`=:subject_id';

但是在任何地方我都看不到表eventMember 。