我正在使用Ionic框架进行移动应用开发。下面的Yii2 API代码可用于文件上传,但它不起作用。它显示以下错误:
i)未定义的偏移量:0。
ii)yii \ db \ BaseActiveRecord-> save()
public function actionNew() {
$model = new Apiprofile();
$userid = $_REQUEST['user_id'];
$photo = $_FILES['photo'];
$model->user_id = $userid;
$model->photo = $photo;
$name = $model->user_id;
$model->file = UploadedFile::getInstance($model, 'photo');
if($model->file) {
$model->file->saveAs('uploads/photos/'.$name.'.'.$model->file->extension);
$model->photo = $name.'.'.$model->file->extension;
$model->save();
}
$name = $model->user_id;
if($model->save()) {
echo json_encode(array('status'=>1,'data'=>$model->attributes),JSON_PRETTY_PRINT);
} else {
echo json_encode(array('status'=>0,'error_code'=>400,'errors'=>$model->errors),JSON_PRETTY_PRINT);
}
}
答案 0 :(得分:0)
您好,如果您愿意,我将分享我在Yii2 REST中处理图像所使用的助手类。
在应用程序的基本文件夹中,创建文件夹组件并在该文件夹内创建两个文件夹助手和对象。
-->assets
-->componests
----->helpers
----->objects
-->config
-->...
之后在对象文件夹中创建类FileUpload并将此代码放入其中。
<?php
namespace app\components\objects;
class FileUpload
{
public $error=[];
public $isSuccess=false;
public $file;
public $ready_path;
public $file_type;
public $file_size;
public $file_extension;
public $file_tmp_name;
public $file_name;
public $save_path;
public function __construct($file,$save_path,$ready_path,$required=false)
{
if(!isset($_FILES[$file])){
if($required){
$this->error=['message'=>$file.' is required'];
}
return $this;
}
$this->save_path=$save_path;
$this->ready_path=$ready_path;
$this->file_type = strtolower($_FILES[$file]['type']);
$this->file_name = $_FILES[$file]['name'];
$this->file_tmp_name=$_FILES[$file]['tmp_name'];
$this->file_size = $_FILES[$file]['size'];
$this->file_extension=pathinfo($this->file_name, PATHINFO_EXTENSION);
}
public function setError($error){
if(empty($this->error)){
$this->error=$error;
}
}
}
然后在helpers文件夹中创建类FileUploadHelper,然后将此代码放入其中。
<?php
namespace app\components\helpers;
use app\components\objects\FileUpload;
use Yii;
class FileUploadHelper
{
private $allowed_files;
private $file_size;
const IMAGE='image';
const FILE='file';
/** File Upload
* @param string $file_name
* @param string $save_path
* @param string $ready_path
* @param string $type
* @param bool $required
* @return \app\components\objects\FileUpload
*/
public static function fileUpload($file_name,$save_path,$ready_path,$type,$required=false){
$image=new FileUpload($file_name,$save_path,$ready_path,$required);
if($type==self::FILE){
$allowed_files=Yii::$app->params['allowed_files'];
$file_size=Yii::$app->params['file_max_size'];
}else{
$allowed_files=Yii::$app->params['allowed_files'];
$file_size=Yii::$app->params['file_max_size'];
}
$dir = realpath(Yii::$app->basePath);
if(in_array($image->file_type,$allowed_files)
&&$image->file_size<$file_size){
$filename = $file_name.'_'.md5(uniqid(time()).time() . '_' . date('YmdHis')) . '.' . $image->file_extension;
$file = $dir . $image->save_path . $filename;
if(move_uploaded_file($image->file_tmp_name, $file)){
$image->file=$image->ready_path. $filename;
$image->isSuccess=true;
$image->setError(['message'=>'file_upload_success']);
}else{
$image->setError(['message'=>'error_try_again']);
}
}else{
$image->setError(['message'=>'file_should_be_no_more_than_given_size']);
}
return $image;
}
/** Delete File
* @param string $ready_file
*/
public static function deleteImage($ready_file){
$dir = realpath(Yii::$app->basePath);
if (strpos($ready_file, 'default') === false){
if(is_file($dir.'/web/'.$ready_file)){
unlink($dir.'/web/'.$ready_file);
}
}
}
}
这就是全部所需要的。下面我将举例说明
public function actionEditAvatar($id)
{
$product = Product::findOne($id);
if( $product ){
$old_avatar=$product->avatar;
$image=FileUploadHelper::fileUpload(ProductForm::AVATAR,Yii::$app->params['product_path'],Yii::$app->params['product_ready_path'],FileUploadHelper::IMAGE);
if($image->isSuccess) {
$product->avatar = $image->file;
if($product->save()){
FileUploadHelper::deleteImage($old_avatar);
return $product->avatar;
}
}
return $image->error;
}
throw new NotFoundHttpException;
}
上面的代码来自一个真实的项目。 FileUploadHelper有两个静态类,分别是“fileUpload”和“deleteImage”。 FileUploadHelper需要fileUpload('file_name','save_path','ready_path','type') 'save_path'是文件的保存位置。 'ready_path'是准备好的URL的样子。 它们在Yii :: $ app-&gt; params [];
您可以通过属性isSuccess检查图像是否成功。如果您有错误,可以通过属性错误访问它们。可以通过属性文件访问就绪文件。你可以通过静态函数deleteImage删除图像('saved_image_url');所有这些都用于上述动作。请看看。 顺便说一句,这里是我使用的参数。不要忘记在web / uploads中创建文件夹,并在配置文件中更改文件夹的名称。
return [
'adminEmail' => 'admin@example.com',
'allowed_images' => [ 'image/jpeg', 'image/gif', 'image/png' ],
'allowed_files' => [ 'application/vnd.openxmlformats-officedocument.wordprocessingml.document','application/msword', 'application/pdf','image/jpeg', 'image/gif', 'image/png'],
'image_max_size' => 2097152,
'file_max_size' => 8388608,
'owner_document_path' => '/web/uploads/owner_document/',
'owner_document_ready_path' => 'uploads/owner_document/',
'product_path' => '/web/uploads/product/',
'product_ready_path' => 'uploads/product/',
'complain_photo_path' => '/web/uploads/complain_photo/',
'complain_photo_ready_path' => 'uploads/complain_photo/',
'owner_path' => '/web/uploads/owner/',
'owner_ready_path' => 'uploads/owner/',
'staff_path' => '/web/uploads/staff/',
'staff_ready_path' => 'uploads/staff/',
];