habtm上的saveall创建重复的新行

Question

我有一个简单的HABTM与一个教训/学生表.我只是创建一个新的教训与现有的学生通过一个而循环，所以我应该得到2个新的行。我正在测试这个功能。我得到的是课程表中的4行而不是2行。我不知道为什么要创建额外的2行，因为它们是在调试中输出的2行的副本。所有内容都正确保存，就像加入课程/学生表中的条目一样，所有的FK都存在。

为了增加混淆，有时同一代码会生成所需的2行。这是不稳定的，所以我做错了什么。我按照手册中的habtm阵列设置进行保存。

http://book.cakephp.org/2.0/en/models/saving-your-data.html

 private function book_lessons($lesson=null) {

       // debug( $lesson);

     $i=0;
     while ($i<2)
     {
      $date=date('Y-m-d');
      $data[$i]=array();
      $this->Lesson->create();

      $data[$i]['Lesson']['lesson_date']= $date;
      $data[$i]['Lesson']['start_time']= $lesson['Lesson']['start_time'];
      $data[$i]['Lesson']['end_time']=$lesson['Lesson']['end_time'];

      $data[$i]['Lesson']['schedule_rec']= 1;
      $data[$i]['Lesson']['subject_id']= $lesson['Lesson']['subject_id'];
      $data[$i]['Lesson']['tutoring_type_id']= 1;
      $data[$i]['Lesson']['tutor_id']= $lesson['Lesson']['tutor_id'];
      $data[$i]['Lesson']['subject_id']= $lesson['Lesson']['subject_id'];
      $data[$i]['Lesson']['term_id']= $lesson['Lesson']['term_id'];

      $data[$i]['Student']['id']=$lesson['Student']['id'];

     $i=$i+1;

     }


      $this->Lesson->saveAll($data);

public $hasAndBelongsToMany = array(

        'Student' => array(
            'className' => 'Student',
            'joinTable' => 'lessons_students',
            'foreignKey' => 'lesson_id',
            'associationForeignKey' => 'student_id',
            'unique' => 'keepExisting',

        )
    );


array(
    (int) 0 => array(
        'Lesson' => array(
            'lesson_date' => '2015-06-11',
            'start_time' => '16:00:00',
            'end_time' => '17:00:00',
            'schedule_rec' => (int) 1,
            'subject_id' => '16',
            'tutoring_type_id' => (int) 1,
            'tutor_id' => '12',
            'term_id' => '10'
        ),
        'Student' => array(
            'id' => '206'
        )
    ),
    (int) 1 => array(
        'Lesson' => array(
            'lesson_date' => '2015-06-11',
            'start_time' => '16:00:00',
            'end_time' => '17:00:00',
            'schedule_rec' => (int) 1,
            'subject_id' => '16',
            'tutoring_type_id' => (int) 1,
            'tutor_id' => '12',
            'term_id' => '10'
        ),
        'Student' => array(
            'id' => '206'
        )
    )
)

Answer 1

将美元移到这个位置-