我有一个关系函数,当数据库中有image_name时,它可以很好地工作。
我可以使用$model->fromProfile->mainImage->image_name
获取图像文件名,但它可以正常工作。
但是如果查询返回whiteout image_name(如果用户没有上传任何符合查询的图像),我将收到一条错误,上面写着“试图获取非对象的属性”。
但为什么呢?我在函数中有一个规则应该处理这个,函数应该检查image_name是否存在,如果不存在,则image_name应该是'no_image.jpg';
这是应该处理这种情况的函数:
public function getMainImage(){
$mainImage = $this->hasOne(Image::className(), ['profile_id' = > 'profile_id'])
->andOnCondition(['main' = > '1']);
if (!isset($mainImage->image_name)) {
$mainImage = new Image();
$mainImage->image_name = 'no_image.jpg';
}
return $mainImage;
}
这是个人资料模型:
public static function tableName(){
return 'tbl_user_profile';
}
public function rules(){
return[
[['user_id'], 'required'],
[['user_id'], 'integer'],
[['place'], 'in', 'range' = >array_keys(self::PLACE)],
[['meeting'], 'in', 'range' = >array_keys(self::MEETING)],
[['expiriance'], 'in', 'range' = >array_keys(self::EXPIRIANCE)],
[['lookingfor'], 'in', 'range' = >array_keys(self::LOOKINGFOR)],
[['about'], 'string'],
[['user_id'], 'exist', 'skipOnError' = > true, 'targetClass' = > User::className(), 'targetAttribute' = >['user_id' = > 'user_id']],
];
}
public function attributeLabels(){
return[
'profile_id' = > 'Profile ID',
'user_id' = > 'User ID',
'about' = > 'about',
'place' = > 'place',
'meeting' = > 'meeting',
'expiriance' = > 'expiriance',
'lookingfor' = > 'Looking for',
];
}
public function getMainImage(){
$mainImage = $this->hasOne(Image::className(), ['profile_id' = > 'profile_id'])
->andOnCondition(['main' = > '1']);
if (!isset($mainImage->image_name)) {
$mainImage = new Image();
$mainImage->image_name = 'no_image.jpg';
}
return $mainImage;
}
这是图像模型:
public static function tableName(){
return 'tbl_images';
}
public function rules() {
return[
[['profile_id', 'image_name'], 'required'],
[['profile_id', 'is_private', 'main'], 'integer'],
['image_name', 'image', 'minWidth' = > 250, 'minHeight' = > 250, 'extensions' = > 'jpg, gif, png, jpeg', 'maxSize' = > 1024 * 1024 * 2],
[['image_name'], 'string', 'max' = > 255],
[['profile_id'], 'exist', 'skipOnError' = > true, 'targetClass' = > Profile::className(), 'targetAttribute' = >['profile_id' = > 'profile_id']],
];
}
public function attributeLabels(){
return[
'image_id' = > 'Image ID',
'profile_id' = > 'Profile ID',
'image_name' = > 'Image Name',
'is_private' = > 'Private Image',
'main' = > 'Main Image',
];
}
public function getUser(){
return $this->hasOne(User::className(), ['user_id' = > 'user_id']);
}
public function getViewers(){
return $this->hasOne(View::className(), ['viewed_profile_id' = > 'profile_id']);
}
public function getProfile(){
return $this->hasOne(Profile::className(), ['profile_id' = > 'profile_id']);
}
答案 0 :(得分:0)
你应该检查$ mainImage而不是$ mainImage-> image_name
if(!isset($mainImage))
{
$mainImage = new Image();
$mainImage->image_name = 'no_image.jpg';
}
或者检查您是否正确输入了列名image_name
或者尝试为每个部分添加表名(由于column_name的限制
$mainImage = $this->hasOne(Image::className(),
['tbl_user_profile.profile_id' => 'tbl_images.profile_id'])