Question

我想将图像上传到数据库，但图像只是存储在文件夹中而不是保存在数据库中。我不明白是什么问题，请帮助我，我在yii2新。代码在contoller上的actionUpdate中

_form.php：

<?php

use yii\helpers\Html;
use yii\widgets\ActiveForm;
use kartik\file\FileInput;
use backend\assets\DashboardAsset;

/* @var $this yii\web\View */
/* @var $model app\models\User */
/* @var $form yii\widgets\ActiveForm */
DashboardAsset::register($this);
?>

<div class="user-form">

    <?php $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]); ?>
    <div class='box box-widget'>
      <div class='box-header with-border'>
        <h1><?= $this->title;?></h1>
      </div>
      <div class='box-body'>

        <div class='row'>
          <div class='col-sm-7'>
            <div class='row'>
              <div class='col-sm-3 label-div'>
                First Name
              </div>
              <div class='col-sm-9'>
                <div class='row'>
                  <div class='col-sm-10'>
                    <?= $form->field($model, 'first_name')->textInput(['maxlength' => true])->label(false) ?>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>

        <div class='row'>
          <div class='col-sm-7'>
            <div class='row'>
              <div class='col-sm-3 label-div'>
                Last Name
              </div>
              <div class='col-sm-9'>
                <div class='row'>
                  <div class='col-sm-10'>
                    <?= $form->field($model, 'last_name')->textInput(['maxlength' => true])->label(false) ?>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>

        <div class='row'>
          <div class='col-sm-7'>
            <div class='row'>
              <div class='col-sm-3 label-div'>
                Avatar
              </div>
              <div class='col-sm-9'>
                <div class='row'>
                  <div class='col-sm-10'>
                    <?= $form->field($model, 'file')->FileInput() ?>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>

      </div>
      <div class='box-footer'>
        <?= Html::submitButton($model->isNewRecord ? 'Create' : 'Update', ['class' => $model->isNewRecord ? 'btn btn-success' : 'btn btn-primary']) ?>
      </div>
    </div>

    <?php ActiveForm::end(); ?>

</div>

Controller.php：

<?php

namespace backend\controllers;

use Yii;
use app\models\User;
use backend\models\UserSearch;
use yii\web\Controller;
use yii\web\NotFoundHttpException;
use yii\filters\VerbFilter;
use yii\web\UploadedFile;

/**
 * UserController implements the CRUD actions for User model.
 */
class UserController extends Controller
{
    /**
     * @inheritdoc
     */
    public function behaviors()
    {
        return [
            'verbs' => [
                'class' => VerbFilter::className(),
                'actions' => [
                    'delete' => ['POST'],
                ],
            ],
        ];
    }

    /**
     * Lists all User models.
     * @return mixed
     */
    public function actionIndex()
    {
        $searchModel = new UserSearch();
        $dataProvider = $searchModel->search(Yii::$app->request->queryParams);

        return $this->render('index', [
            'searchModel' => $searchModel,
            'dataProvider' => $dataProvider,
        ]);
    }

    /**
     * Displays a single User model.
     * @param integer $id
     * @return mixed
     */
    public function actionView($id)
    {
        return $this->render('view', [
            'model' => $this->findModel($id),
        ]);
    }

    /**
     * Creates a new User model.
     * If creation is successful, the browser will be redirected to the 'view' page.
     * @return mixed
     */
    public function actionCreate()
    {
        $model = new User();

        if ($model->load(Yii::$app->request->post()) && $model->save()) {
            return $this->redirect(['view', 'id' => $model->id]);
        } else {
            return $this->render('create', [
                'model' => $model,
            ]);
        }
    }

    /**
     * Updates an existing User model.
     * If update is successful, the browser will be redirected to the 'view' page.
     * @param integer $id
     * @return mixed
     */
    public function actionUpdate($id)
    {
        $model = $this->findModel($id);

        if ($model->load(Yii::$app->request->post())) {
            $path = "uploads/img/user/";
            $imageName = $model->username;
            //upload file
            $model->file = UploadedFile::getInstance($model, 'file');
            $model->file->saveAs($path.$imageName.'.'.$model->file->extension);
$model->avatar = $path.$imageName.'.'.$model->file->extension);

$model->save()

            return $this->redirect(['view', 'id' => $model->id]);
        } else {
            return $this->render('update', [
                'model' => $model,
            ]);
        }
    }

    /**
     * Deletes an existing User model.
     * If deletion is successful, the browser will be redirected to the 'index' page.
     * @param integer $id
     * @return mixed
     */
    public function actionDelete($id)
    {
        $this->findModel($id)->delete();

        return $this->redirect(['index']);
    }

    /**
     * Finds the User model based on its primary key value.
     * If the model is not found, a 404 HTTP exception will be thrown.
     * @param integer $id
     * @return User the loaded model
     * @throws NotFoundHttpException if the model cannot be found
     */
    protected function findModel($id)
    {
        if (($model = User::findOne($id)) !== null) {
            return $model;
        } else {
            throw new NotFoundHttpException('The requested page does not exist.');
        }
    }
}

这是模型

<?php

namespace app\models;

use Yii;

/**
 * This is the model class for table "user".
 *
 * @property integer $id
 * @property string $username
 * @property string $auth_key
 * @property string $password_hash
 * @property string $password_reset_token
 * @property string $email
 * @property string $first_name
 * @property string $last_name
 * @property string $avatar
 * @property integer $status
 * @property integer $created_at
 * @property integer $updated_at
 */
class User extends \yii\db\ActiveRecord
{
    /**
     * @inheritdoc
     */
     public $file;
    public static function tableName()
    {
        return 'user';
    }

    /**
     * @inheritdoc
     */
    public function rules()
    {
        return [
            [['username', 'auth_key', 'password_hash', 'email', 'first_name', 'last_name', 'avatar', 'created_at', 'updated_at'], 'required'],
            [['status', 'created_at', 'updated_at'], 'integer'],
            [['username','file', 'password_hash', 'password_reset_token', 'email', 'first_name', 'last_name', 'avatar'], 'string', 'max' => 255],
            [['auth_key'], 'string', 'max' => 32],
            [['username'], 'unique'],
            [['email'], 'unique'],
            [['file'],'file'],
            [['password_reset_token'], 'unique'],
        ];
    }

    /**
     * @inheritdoc
     */
    public function attributeLabels()
    {
        return [
            'id' => 'ID',
            'username' => 'Username',
            'auth_key' => 'Auth Key',
            'password_hash' => 'Password Hash',
            'password_reset_token' => 'Password Reset Token',
            'email' => 'Email',
            'first_name' => 'First Name',
            'last_name' => 'Last Name',
            'avatar' => 'Avatar',
            'status' => 'Status',
            'created_at' => 'Created At',
            'updated_at' => 'Updated At',
            'file' => 'Avatar',
        ];
    }
}

Answer 1

controller use the same code in update action also

use yii\web\UploadedFile;
use backend\models\User;

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

        if ($model->load(Yii::$app->request->post())){
                $model->file = UploadedFile::getInstances($model, 'file');
                if ($model->file) {
                    foreach ($model->file as $file) {
                        $path = 'uploads/images/' . $file->baseName . '.' . $file->extension;
                        $count = 0;
                        {
                            while(file_exists($path)) {
                               $path = 'uploads/images/' . $file->baseName . '_'.$count.'.' . $file->extension;
                               $count++;
                            }
                        }
                        $file->saveAs($path);
                        $files[] = $path;
                    } 
                      $model->file = implode(',', $files);
                     $model->save();
        return $this->redirect(['view', 'id' => $model->id]);}

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

now add the following to your user model(not mandatory)

[['file'], 'file', 'skipOnEmpty' => true, 'extensions' => 'png,gif,jpg', 'maxFiles' => 15],

just try the above to your code,and inform me if any error we can make it work together

Answer 2

首先从模型规则的必需部分中删除avatar。

第二次把这一行$model->file->saveAs($path.$imageName.'.'.$model->file->extension); 之后 $model->save();

第三次检查所有语法都已更正，因为我可以在actionUpdate中看到一个分号丢失。

现在您的新actionUpdate如下所示：

  public function actionUpdate($id)
    {
        $model = $this->findModel($id);

        if ($model->load(Yii::$app->request->post())) {
            $path = "uploads/img/user/";
            $imageName = $model->username;
            //upload file
            $model->file = UploadedFile::getInstance($model, 'file');

$model->avatar = $path.$imageName.'.'.$model->file->extension;

$model->save();

 $model->file->saveAs($model->avatar);

// or   $model->file->saveAs($path.$imageName.'.'.$model->file->extension);

            return $this->redirect(['view', 'id' => $model->id]);
        } else {
            return $this->render('update', [
                'model' => $model,
            ]);
        }
    }

最重要的一件事是从所需规则中删除所有其他不可见的列。否则数据永远不会保存在db。

中

现在您的模型规则如下所示：

public function rules()
    {
        return [
            [[ 'first_name', 'last_name'], 'required'],
            [['status', 'created_at', 'updated_at'], 'integer'],
            [['username','file', 'password_hash', 'password_reset_token', 'email', 'first_name', 'last_name', 'avatar'], 'string', 'max' => 255],
            [['auth_key'], 'string', 'max' => 32],
           //[['username'], 'unique'],
          //  [['email'], 'unique'],
            [['file'],'file'],
          //  [['password_reset_token'], 'unique'],
        ];
    }

还有一件事将db中其他字段的默认值设置为NULL 或者将所有其他字段添加到表单中，以便您也可以输入值。

图像保存在文件夹中，但未保存在yii 2.0中的数据库中

2 个答案: