CakePHP3 - belongsToMany保存失败

Question

我花了将近一整天的时间让一个belongsToMany保存在Cake v3中工作。我的代码如下：

列表belongsToMany PaymentTypes PaymentTypes belongsToMany Listings

表格

• 选
• payment_types
• listings_payment_types

编目

class Listing extends Entity {

    protected $_accessible = [
        '*' => true,
        'id' => false,
    ];

}

class ListingsTable extends Table { 

    public function initialize(array $config) {

        $this->belongsToMany('PaymentTypes');

    }

}

PaymentTypes

class PaymentType extends Entity {

    protected $_accessible = [
        '*' => true,
        'id' => false
    ];

}

class PaymentTypesTable extends Table {

    public function initialize(array $config) {

        $this->belongsToMany('Listings');

    }

}

列表控制器::添加

public function add() {

    $listing=$this->Listings->newEntity();

    if ($this->request->is('post')) {

        $listing = $this->Listings->patchEntity($listing, $this->request->data);

        if ($this->Listings->save($listing, ['associated' => ['ListingImages', 'PaymentTypes']])) {
            $this->Flash->success('Your listing has been successfully submitted', ['key' => 'message']);
            return $this->redirect(['action' => 'add']);
        }
        else{
            debug($listing->errors());
            $this->Flash->error('Please correct the errors below', ['key' => 'message']);
        }
    }

    $this->set('paymentTypes', $this->Listings->PaymentTypes->find('list'));

}

请求数据

[
    'title' => 'Test',
    'description' => 'Some information',
    'price' => '100.00',
    'listing_type_id' => '1',
    'vehicle_id' => '2',
    'category_id' => '1',
    'location' => 'Test',
    'country_id' => '38',
    'payment_types' => [
        '_id' => [
            (int) 0 => '1',
            (int) 1 => '2',
            (int) 2 => '3'
        ]
    ],
    'listing_images' => [
        (int) 0 => [
            'name' => 'IMG-20160513-WA0014.jpg',
            'type' => 'image/jpeg',
            'tmp_name' => 'C:\Program Files\phpB619.tmp',
            'error' => (int) 0,
            'size' => (int) 87863
        ],
    ]
]

我使用了Cake书作为指南，我看不出有什么东西丢失，但是保存失败了。