Question

在提交表单之前，一切都很好。当我提交表单时，它在控制器中表单的函数中的特定行给出错误。该行如下：

$model->file->saveAs('uploads/'.$model->file->baseName.'.'.$model->file->extension);

查看文件（signup.php）如下：

<?php
use yii\helpers\Html;
use yii\bootstrap\ActiveForm;

/* @var $this yii\web\View */
/* @var $form yii\bootstrap\ActiveForm */
/* @var $model \frontend\models\SignupForm */

$this->title = 'Signup';
$this->params['breadcrumbs'][] = $this->title;
?>
<div class="site-signup">
    <h1><?= Html::encode($this->title) ?></h1>

    <p>Please fill out the following fields to signup:</p>

    <div class="row">
        <div class="col-lg-5">
            <?php $form = ActiveForm::begin(['id' => 'form-signup','options'=> ['enctype'=>'multipart/form-data']]); ?>
                <?= $form->field($model, 'firstname') ?>
                <?= $form->field($model, 'lastname') ?>
                <?= $form->field($model, 'username') ?>
                <?= $form->field($model, 'email') ?>
                <?= $form->field($model, 'photo')->fileInput() ?>
                <?= $form->field($model, 'password')->passwordInput() ?>
                <div class="form-group">
                    <?= Html::submitButton('Signup', ['class' => 'btn btn-primary', 'name' => 'signup-button']) ?>
                </div>
            <?php ActiveForm::end(); ?>
        </div>
    </div>
</div>

我在这里只写了那个特定形式的功能。控制器文件（SiteController.php）如下：

namespace frontend\controllers;

use Yii;
use common\models\LoginForm;
use frontend\models\PasswordResetRequestForm;
use frontend\models\ResetPasswordForm;
use frontend\models\SignupForm;
use frontend\models\ContactForm;
use yii\base\InvalidParamException;
use yii\web\BadRequestHttpException;
use yii\web\Controller;
use yii\filters\VerbFilter;
use yii\filters\AccessControl;
use yii\web\UploadedFile;

public function actionSignup()
    {
        $model = new SignupForm();
        if ($model->load(Yii::$app->request->post())) {
            $photo = UploadedFile::getInstances($model,'photo');
            $model->file->saveAs('uploads/'.$model->file->baseName.'.'.$model->file->extension); **// error is in this line.**
            if ($user = $model->signup()) {
                if (Yii::$app->getUser()->login($user)) {
                    return $this->goHome();
                }
            }
        }

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

模型文件（SignupForm.php）如下：

namespace frontend\models;

use common\models\User;
use yii\base\Model;
use Yii;

/**
 * Signup form
 */
class SignupForm extends Model
{
    public $username;
    public $email;
    public $password;
    public $firstname;
    public $lastname;
    public $photo;

    /**
     * @inheritdoc
     */
    public function rules()
    {
        return [
            ['username', 'filter', 'filter' => 'trim'],
            ['username', 'required'],
            ['username', 'unique', 'targetClass' => '\common\models\User', 'message' => 'This username has already been taken.'],
            ['username', 'string', 'min' => 2, 'max' => 255],

            ['firstname','required'],
            ['firstname','string','min' => 2, 'max' => 20],

            ['lastname','required'],
            ['lastname','string','min' => 2, 'max' => 20],

            [['photo'],'file'],

            ['email', 'filter', 'filter' => 'trim'],
            ['email', 'required'],
            ['email', 'email'],
            ['email', 'unique', 'targetClass' => '\common\models\User', 'message' => 'This email address has already been taken.'],

            ['password', 'required'],
            ['password', 'string', 'min' => 6],
        ];
    }

    /**
     * Signs user up.
     *
     * @return User|null the saved model or null if saving fails
     */
    public function signup()
    {
        if ($this->validate()) {
            $user = new User();
            $user->firstname = $this->firstname;
            $user->lastname = $this->lastname;
            $user->photo = $this->photo;
            $user->username = $this->username;
            $user->email = $this->email;
            $user->setPassword($this->password);
            $user->generateAuthKey();
            if ($user->save()) {
                return $user;
            }
        }

        return null;
    }
}

任何人都可以告诉我究竟是什么问题并给我解决方案。提前谢谢。

Answer 1

您的先知$model->file为空。在Yii2中，与Yii 1. *不同，您需要将UploadedFile::getInstances($model,'photo')设置为$model->file，而不是保存文件。

$model->file = UploadedFile::getInstances($model,'photo');
$model->file->saveAs('uploads/'.$model->file->baseName.'.'.$model->file->extension);

此外，您拥有属性file，在您的模型（SignupForm.php）中，您有photo，您需要更改代码：

$model->photo= UploadedFile::getInstances($model,'photo');
$model->photo->saveAs('uploads/'.$model->photo->baseName.'.'.$model->photo->extension);

Answer 2

我做到了这样的事情和它的工作。在 UploadForm.php 模型中：

<?php
namespace app\models;

use yii\base\Model;
use yii\web\UploadedFile;
use Yii;

class UploadForm extends Model
{
    public $file;

    public $name;

    public function rules()
    {
        return [
            [['file'], 'file','skipOnEmpty' => false,'extensions' => 'jpg, png', 'mimeTypes' => 'image/jpeg, image/png'],
        ];
    }
}

在控制器中

use app\models\UploadForm;
use yii\web\UploadedFile;

public function actionProfileImage()
{
    $model = new UploadForm();
    if (Yii::$app->request->isPost) {
        $model->file = UploadedFile::getInstance($model, 'file');
        if ($model->validate()) {
            $fileName = $this->userData->username . '.jpg';
            $image = $model->file->saveAs(Yii::$app->basePath.'/files/profile/' . $fileName);
            if($image){
                \Yii::$app->getSession()->setFlash('msg', 'Profile Image Updated Successfully.');
                return $this->redirect('profile-image', [
                    'model' => $model,
                ]);
            }
        }
    }
    return $this->render('profileImage');
}

在视图文件中：

<?php $form = ActiveForm::begin(['id' => 'form-profile','options' => ['enctype' => 'multipart/form-data']]); ?>
<?= $form->field($model, 'file')->fileInput(); ?>
<?= Html::submitButton(Yii::t('keywords', 'Submit'), ['class' => 'btn btn-primary', 'name' => 'submit-button']) ?>
<?php ActiveForm::end(); ?>

使用yii 2.0.3上传文件时出错

2 个答案: