我在两个yii2模型之间实现了多对多的关系:滑块,图像,sliders_images,其中sliderrs_images是联结表 . 每个模型都扩展了由Gii生成的基本模型,因此当我需要时,我可以覆盖基本模型而不会丢失个人方法 .
Slider.php
...
public function getImages(){
return $this->hasMany(Images::className(), ['id' => 'image_id'])
->viaTable('sliders_images', ['slider_id' => 'id']);
}
...
Images.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 $this->hasOne(Slider::className(), ['id' => 'slider_id']);
}
...
当我使用函数link()来创建一个滑块上的联结表时,所有工作正常,但当我尝试从滑块ActiveRecord对象(Yii2 documentation)获取图像时出现问题:
public function actionView($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 . 我如何设置模型以获得关系中的正确访问权限?
Edit:
当我尝试访问slidersImage以获取juncyion表的行时: $slider->sliderImage
工作正常,错过了图像行的访问权限 .
滑块表
id | nome | descrizione | active
-------------------------------------------
28 | adfjkhbfvòja | JAFNHÒDF | 1
sliders_images表
slider_id | image_id | display_order|
--------------------------------------
28 | 16 | 3 |
--------------------------------------
28 | 17 | 5 |
图像表
id | date | url |
------------------------------------
16 | 2016-06-21 16:21:04 | img/url |
------------------------------------
17 | 2016-06-21 16:22:37 | img/url |
Edit2:
来自调试器的数据库序列:
1 11:27:02.666 0.7 ms SHOW SHOW FULL COLUMNS FROM `admin`
/var/www/html/yii_advance/backend/models/Admin.php (65)
-------------------------------------------------------------------------
2 11:27:02.668 0.6 ms SHOW SHOW FULL COLUMNS FROM `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)
--------------------------------------------------------------------------
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)
[+] Explain
--------------------------------------------------------------------------
4 11:27:02.667 0.5 ms SELECT SELECT
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 OR
(kcu.constraint_catalog IS NULL AND rc.constraint_catalog IS NULL)
) AND
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)
[+] Explain
--------------------------------------------------------------------------
5 11:27:02.669 0.5 ms SELECT SELECT
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 OR
(kcu.constraint_catalog IS NULL AND rc.constraint_catalog IS NULL)
) AND
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)
[+] Explain
--------------------------------------------------------------------------
6 11:27:02.669 0.4 ms 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)
1 回答
应重命名此
public $images;
属性,因为它与关系名称getImages()
重合