Question

我尝试使用Yii2文件上传上传文件，文件路径成功保存到数据库但文件未保存到我指定的目录..下面是我的代码..

<?php
namespace backend\models;
use yii\base\Model;
use yii\web\UploadedFile;
use yii\Validators\FileValidator;
use Yii;




class UploadForm extends Model 
{

 /**
     * @var UploadedFile

 */

public $image;
public $randomCharacter;


public function rules(){

    return[

            [['image'], 'file', 'skipOnEmpty' => false,  'extensions'=> 'png, jpg,jpeg'],
        ];
    }


 public function upload(){

     $path = \Yii::getAlias("@backend/web/uploads/");

     $randomString = "";

     $length = 10;

     $character = "QWERTYUIOPLKJHGFDSAZXCVBNMlkjhgfdsaqwertpoiuyzxcvbnm1098723456";


     $randomString = substr(str_shuffle($character),0,$length);
              $this->randomCharacter =  $randomString;
          if ($this->validate()){

               $this->image->saveAs($path .$this->randomCharacter .'.'.$this->image->extension);
               //$this->image->saveAs(\Yii::getAlias("@backend/web/uploads/{$randomString}.{$this->image->extension}"));
                return true;
        }else{
            return false;
        }

    }



}

用于创建fileupload的控制器

namespace backend\controllers;

use Yii;
use backend\models\Product;
use backend\models\ProductSearch;
use yii\web\Controller;
use yii\web\NotFoundHttpException;
use yii\filters\VerbFilter;
use backend\models\UploadForm;
use yii\web\UploadedFile;


public function actionCreate()
    {

        $addd_at = time();
        $model = new Product();
        $upload = new UploadForm();

        if($model->load(Yii::$app->request->post())){
            //get instance of the uploaded file
            $model->image = UploadedFile::getInstance($model, 'image');

            $upload->upload();
            $model->added_at = $addd_at;
            $model->image = 'uploads/' .$upload->randomCharacter .'.'.$model->image->extension;

             $model->save();
                return $this->redirect(['view', 'product_id' => $model->product_id]);

        } else{
                return $this->render('create', [
                'model' => $model,
              ]);

            }

    }

Answer 1

是否会抛出任何错误？

这可能是许可问题。尝试将“uploads”目录权限更改为777（仅供测试）。

Answer 2

使用表单数据加载产品（$ model）。

if($model->load(Yii::$app->request->post()))

但是上传形式（$ upload）永远不会填写你的脚本。因此，$ upload-＆gt;图片将为空。

因为您声明'skipOnEmpty'=＆gt;如果在UploadForm规则的文件验证器中为false，则$ upload上的验证将失败。

这就是为什么上述评论中的if语句（if（$ upload-＆gt; upload（））不能保存$ model数据。

我不明白为什么你需要另一个模型来达到这个目的。它只会使事情变得复杂，所以我假设它是因为你从教程中复制了它。要修复并使事情变得更简单，只需执行以下操作：

将属性添加到产品型号

public $image;

将图像规则添加到产品型号

[['image'], 'file', 'skipOnEmpty' => false,  'extensions'=> 'png, jpg,jpeg'],

调整控制器创建操作

public function actionCreate()
{
    $model = new Product();

    if($model->load(Yii::$app->request->post()) && $model->validate()) {
        // load image
        $image = UploadedFile::getInstance($model, 'image');
        // generate random filename
        $rand = Yii::$app->security->generateRandomString(10);
        // define upload path
        $path = 'uploads/' . $rand . '.' . $image->extension;
        // store image to server
        $image->saveAs('@webroot/' . $path);

        $model->added_at = time();
        $model->image = $path;

        if($model->save()) {
            return $this->redirect(['view', 'product_id' => $model->product_id]);
        }
    } else {
        return $this->render('create', [
            'model' => $model,
        ]);
    }
}

这样的事情应该可以解决问题。

Answer 3

你的UploadForm类已经在Backend上了，所以在UploadForm类的函数上传时应该是这样的：改变这一行：

$path = \Yii::getAlias("@backend/web/uploads/");

到此：

$path = \Yii::getAlias("uploads")."/";

上传成功后我的文件不在uploads目录中

3 个答案: