写入JoinTable时CakePHP hasAndBelongsToMany错误

Question

我通过联接表Products将Images映射到Products_Images

产品型号：

class Product extends AppModel {
    public $hasAndBelongsToMany = array(
        'Image' => array(
            'className' => 'Image',
            'joinTable' => 'products_images',
            'dependent' => true,
            'foreignKey' => 'product_id',
            'associationForeignKey' => 'image_id'
        )
    );    
}

图片模型：

class Image extends AppModel {
    public $hasAndBelongsToMany = array(
        'Product' => array(
            'className' => 'Product',
            'joinTable' => 'products_images',
            'foreignKey' => 'image_id',
            'associationForeignKey' => 'product_id'
        )
    );
}

产品控制器中的

操作代码段：

if($this->request->is('post')) {
            if(!empty($this->request->data)) {
                $this->Product->create();
                if($this->Product->save($this->request->data)) {
                    $newProductID = $this->Product->id;

                    foreach($this->request->data['Uploads'] as $image):
                        //Check if image has been uploaded
                        if(!empty($image['name'])) {
                            $ext = substr(strtolower(strrchr($image['name'], '.')), 1); //get the extension
                            $arr_ext = array('jpg', 'jpeg', 'png'); //set allowed extensions

                            //only process if the extension is valid
                            if(in_array($ext, $arr_ext))
                            {
                                //do the actual uploading of the file. First arg is the tmp name, second arg is
                                //where we are putting it
                                move_uploaded_file($image['tmp_name'], './img/uploads/products/' . $image['name']);

                                //prepare the Image for database entry
                                $this->request->data['Image']['name'] = $image['name'];

                                //save image
                                $this->Product->Image->save($this->request->data);
                            }
                        }
                    endforeach;

                    $this->Session->setFlash(
                        'Product has been successfully created.',
                        'default',
                        array('class' => 'alert-success')
                    );
                    return $this->redirect(array('action' => 'view',$newProductID));
                } else {
                    $this->Session->setFlash(
                        'Product has could not be created. Please try again.',
                        'default',
                        array('class' => 'alert-danger')
                    );
                    return $this->redirect(array('action' => 'index'));
                }
            }
        }

这是Products控制器中的操作收到的内容：

ISSUE： 这很好地将Product添加到表中，它还很好地将Image添加到表中，但是它在Products_Images表中创建了4个seamingly random条目。它使image_id正确，但它会插入4个随机product_ids。