Stop getting duplicate rows on 'saveAll' in CakePHP - php

Question

In CakePHP when I save the data with the below code, I get the data being saved as expected but I get all the data saved 2 times. The $lesson data variable does not retrieve 2 copies of the data so the save function is the problem. I tried using save in a loop and that gives the same problem. There must be something simple I am doing wrong.
http://book.cakephp.org/2.0/en/models/saving-your-data.html#model-save-array-data-null-boolean-validate-true-array-fieldlist-array
$data=array();
$i=0;
$this->Lessondata->cacheQueries = false;
$this->Lessondata->create( );
foreach ($lessons as $item):
// $this->Lessondata->cacheQueries = false;
$data[$i]['Lessondata']['lesson_id']=$item['Lesson']['id'];
$data[$i]['Lessondata']['st_id']=$item['Student']['id'];
$data[$i]['Lessondata']['tutor_id']=$item['Tutor']['id'];
$data[$i]['Lessondata']['student_name']=$item['Student']['first_name'].' '.$item['Student']['last_name'];
$data[$i]['Lessondata']['subject']=$item['Subject']['name'];
$data[$i]['Lessondata']['tutor_name']=$item['Tutor']['first_name'].' '.$item['Tutor']['last_name'];
$data[$i]['Lessondata']['class_year']=$item['Student']['class_year'];
// debug($data[$i]);
debug($i);
$i=$i+1;
endforeach;
$this->Lessondata->saveAll($data);

Answer 1

Try it.
$data = array();
foreach ($lessons as $item):
$data['Lessondata'][] = array(
'lesson_id' => $item['Lesson']['id'],
'st_id' => $item['Student']['id'],
'tutor_id' => $item['Tutor']['id'],
'student_name' => $item['Student']['first_name'] . ' ' . $item['Student']['last_name'],
'subject' => $item['Subject']['name'],
'tutor_name' => $item['Tutor']['first_name'] . ' ' . $item['Tutor']['last_name'],
'class_year' => $item['Student']['class_year'],
);
endforeach;
$this->Lessondata->create();
$this->Lessondata->saveAll($data);

Answer 2

This works but I need to check when the duplication starts. This is a bad answer as I am allowing for a quirk. As yet there is no other answer. I am happy to take this down if someone provides a working answer.
$this->Lessondata->create();
foreach ($lessons as $item):
$ff = $this->Lessondata->find('first', array(
'conditions' => array('Lessondata.lesson_id' => $item['Lesson']['id'])
));
if (!empty($ff)) {
debug($item);
break;
}
$data[$i]['Lessondata']['lesson_id'] = $item['Lesson']['id'];
$data[$i]['Lessondata']['st_id'] = $item['Student']['id'];
$data[$i]['Lessondata']['tutor_id'] = $item['Tutor']['id'];
$data[$i]['Lessondata']['student_name'] = $item['Student']['first_name'].' '.$item['Student']['last_name'];
$data[$i]['Lessondata']['subject'] = $item['Subject']['name'];
$data[$i]['Lessondata']['tutor_name'] = $item['Tutor']['first_name'].' '.$item['Tutor']['last_name'];
$data[$i]['Lessondata']['class_year'] = $item['Student']['class_year'];
$i = $i+1;
endforeach;
debug($data);
$this->Lessondata->saveAll($data);