1

我在两个 yii2 模型之间实现了多对多关系：滑块、图像、滑块图像，其中滑块图像是连接表。每个模型都扩展了 Gii 生成的基本模型，所以当我需要时，我可以覆盖基本模型而不会丢失个人方法。
滑块.php

...
public function getImages(){
    return $this->hasMany(Images::className(), ['id' => 'image_id'])
        ->viaTable('sliders_images', ['slider_id' => 'id']);
}
...

图片.php

...
public function getSlider(){
     return $this->hasMany(Slider::className(), ['slider_id' => 'id'])
        ->viaTable('sliders_images', ['image_id' => 'id']);
}
...

SlidersImages.php

...
/**
 * @return \yii\db\ActiveQuery
 */
public function getImage()
{
    return $this->hasOne(Images::className(), ['id' => 'image_id']);
}

/**
 * @return \yii\db\ActiveQuery
 */
public function getSlider()
{
    return $this->hasOne(Slider::className(), ['id' => 'slider_id']);
}
...

当我使用函数 link() 在创建滑块时填充连接表时，一切正常，但是当我尝试从滑块 ActiveRecord 对象（Yii2 文档）获取图像时出现问题：

public function actionView($id)
{
    $slider = $this->findModel($id);
    return $this->render('view', [
        'model' => $slider,
        'images' => $slider->images
    ]);
}

protected function findModel($id)
{
    if (($model = Slider::findOne($id)) !== null) {
        return $model;
    } else {
        throw new NotFoundHttpException('The requested page does not exist.');
    }
}

如果我在视图中调试 $images 变量，这是 null 并且不包含相关图像。我如何设置模型以在关系中获得正确的访问权限？

编辑：
当我尝试访问 slidersImage 以获取 juncyion 表的行时：$slider->sliderImage工作正常，错过图像行的访问。

滑块表

编号 | 名称 | 描述 | 积极的
------------------------------------------
28 | adfjkhbfvòja | JAFNHÒDF | 1


sliders_images 表

滑块 ID | image_id | 显示顺序|
--------------------------------------
28 | 16 | 3 |
--------------------------------------
28 | 17 | 5 |


图像表

编号 | 日期 | 网址 |
----------------------------------
16 | 2016-06-21 16:21:04 | 图片/网址 |
----------------------------------
17 | 2016-06-21 16:22:37 | 图片/网址 |

编辑2：

来自调试器的数据库序列：

    1 11:27:02.666 0.7 ms 显示来自 `admin` 的完整列
    /var/www/html/yii_advance/backend/models/Admin.php (65)
-------------------------------------------------- ----------------------
    2 11:27:02.668 0.6 ms 显示“滑块”中的完整列
    /var/www/html/yii_advance/common/modules/sliders/controllers/SliderController.php (173)
    /var/www/html/yii_advance/common/modules/sliders/controllers/SliderController.php (79)
-------------------------------------------------- ----------------------
    3 11:27:02.665 0.6 ms SELECT SELECT * FROM `admin` WHERE (`id`=2) AND (`status`=10)
    /var/www/html/yii_advance/backend/models/Admin.php (65)
    [+] 解释
-------------------------------------------------- ----------------------
    4 11:27:02.667 0.5 毫秒选择选择
        kcu.constraint_name,
        kcu.column_name,
        kcu.referenced_table_name,
        kcu.referenced_column_name
    FROM information_schema.referential_constraints AS rc
    JOIN information_schema.key_column_usage AS kcu ON
        (
            kcu.constraint_catalog = rc.constraint_catalog 或
            （kcu.constraint_catalog 为空且 rc.constraint_catalog 为空）
        ） 和
        kcu.constraint_schema = rc.constraint_schema AND
        kcu.constraint_name = rc.constraint_name
    WHERE rc.constraint_schema = database() AND kcu.table_schema = database()
    AND rc.table_name = 'admin' AND kcu.table_name = 'admin'
    /var/www/html/yii_advance/backend/models/Admin.php (65)
    [+] 解释
-------------------------------------------------- ----------------------
    5 11:27:02.669 0.5 毫秒选择选择
        kcu.constraint_name,
        kcu.column_name,
        kcu.referenced_table_name,
        kcu.referenced_column_name
    FROM information_schema.referential_constraints AS rc
    JOIN information_schema.key_column_usage AS kcu ON
        (
            kcu.constraint_catalog = rc.constraint_catalog 或
            （kcu.constraint_catalog 为空且 rc.constraint_catalog 为空）
        ） 和
        kcu.constraint_schema = rc.constraint_schema AND
        kcu.constraint_name = rc.constraint_name
    WHERE rc.constraint_schema = database() AND kcu.table_schema = database()
    AND rc.table_name = 'slider' AND kcu.table_name = 'slider'
    /var/www/html/yii_advance/common/modules/sliders/controllers/SliderController.php (173)
    /var/www/html/yii_advance/common/modules/sliders/controllers/SliderController.php (79)
    [+] 解释
-------------------------------------------------- ----------------------
    6 11:27:02.669 0.4 毫秒 SELECT SELECT * FROM `slider` WHERE `id`='28'
    /var/www/html/yii_advance/common/modules/sliders/controllers/SliderController.php (173)
    /var/www/html/yii_advance/common/modules/sliders/controllers/SliderController.php (79)
4

1 回答 1

2

此public $images;属性应重命名，因为它与关系名称一致getImages()

class Slider extends Sl
{
    const SCENARIO_CREATE = 'create';
    const SCENARIO_VIEW = 'view';
    const SCENARIO_UPDATE = 'update';

    public $images; // This should be renamed
    ...
于 2016-06-23T12:28:08.863 回答