我有一个ActiveForm,我想添加一个用户可以上传照片的字段。 问题是我没有在用户表和每个用户的图像属性 输入字段在' yii'期望模型和属性如下。
<?= $form->field($model, 'attribute')->input($platforms) ?>
我不想将图像分配给任何记录,也不想插入数据库,我希望将其上传到特定文件夹。
我还检查过kartik写的库,但也需要一个属性字段。
答案 0 :(得分:45)
按照官方文档
https://github.com/yiisoft/yii2/blob/master/docs/guide/input-file-upload.md
表单模型
namespace app\models;
use yii\base\Model;
use yii\web\UploadedFile;
/**
* UploadForm is the model behind the upload form.
*/
class UploadForm extends Model
{
/**
* @var UploadedFile|Null file attribute
*/
public $file;
/**
* @return array the validation rules.
*/
public function rules()
{
return [
[['file'], 'file'],
];
}
}
?>
表单视图
<?php
use yii\widgets\ActiveForm;
$form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]); ?>
<?= $form->field($model, 'file')->fileInput() ?>
<button>Submit</button>
<?php ActiveForm::end(); ?>
控制器
现在创建将表单和模型连接在一起的控制器:
<?php
namespace app\controllers;
use Yii;
use yii\web\Controller;
use app\models\UploadForm;
use yii\web\UploadedFile;
class SiteController extends Controller
{
public function actionUpload()
{
$model = new UploadForm();
if (Yii::$app->request->isPost) {
$model->file = UploadedFile::getInstance($model, 'file');
if ($model->validate()) {
$model->file->saveAs('uploads/' . $model->file->baseName . '.' . $model->file->extension);
}
}
return $this->render('upload', ['model' => $model]);
}
}
?>
而不是model->load(...)
我们正在使用UploadedFile::getInstance(...)
。 [[\yii\web\UploadedFile|UploadedFile]]
未运行模型验证。它仅提供有关上载文件的信息。因此,您需要通过$model->validate()
手动运行验证。这会触发需要文件的[[yii\validators\FileValidator|FileValidator]]
:
$file instanceof UploadedFile || $file->error == UPLOAD_ERR_NO_FILE //in code framework
如果验证成功,我们将保存文件:
$model->file->saveAs('uploads/' . $model->file->baseName . '.' . $model->file->extension);
如果您正在使用&#34;基本&#34;应用程序模板然后应在web下创建文件夹上传。
那就是它。加载页面并尝试上传。 Uplaods最终应该是基本/网络/上传。
答案 1 :(得分:14)
use kartik\widgets\ActiveForm;
use kartik\widgets\FileInput;
$form = ActiveForm::begin(['options' => ['enctype'=>'multipart/form-data']]); //important
echo FileInput::widget([
'name' => 'filename',
'showUpload' => false,
'buttonOptions' => ['label' => false],
'removeOptions' => ['label' => false],
'groupOptions' => ['class' => 'input-group-lg']
]);
echo Html::submitButton('Submit', ['class'=>'btn btn-primary']);
ActiveForm::end();
控制器中的
$file = \yii\web\UploadedFile::getInstanceByName('filename');
$file->saveAs('/your/directory/'.$file->name);
答案 2 :(得分:6)
为您的模型创建一个只读属性,如public $image
,然后继续
<?= $form->field($model, 'image')->fileInput() ?>
答案 3 :(得分:2)
我非常喜欢Yii2 Dropzone。
安装:
composer require --prefer-dist perminder-klair/yii2-dropzone "dev-master"
用法:
<?php
echo \kato\DropZone::widget([
'options' => [
'url'=> Url::to(['resource-manager/upload']),
'paramName'=>'image',
'maxFilesize' => '10',
],
'clientEvents' => [
'complete' => "function(file){console.log(file)}",
'removedfile' => "function(file){alert(file.name + ' is removed')}"
],
]);
?>
控制器:
public function actionUpload(){
$model = new ResourceManager();
$uploadPath = Yii::getAlias('@root') .'/uploads/';
if (isset($_FILES['image'])) {
$file = \yii\web\UploadedFile::getInstanceByName('image');
$original_name = $file->baseName;
$newFileName = \Yii::$app->security
->generateRandomString().'.'.$file->extension;
// you can write save code here before uploading.
if ($file->saveAs($uploadPath . '/' . $newFileName)) {
$model->image = $newFileName;
$model->original_name = $original_name;
if($model->save(false)){
echo \yii\helpers\Json::encode($file);
}
else{
echo \yii\helpers\Json::encode($model->getErrors());
}
}
}
else {
return $this->render('upload', [
'model' => $model,
]);
}
return false;
}
答案 4 :(得分:0)
在上传的代码
后提供此代码 //save the path in DB..
$model->file = 'uploads/'.$imageName.'.'.$model->file->extension;
$model->save();
答案 5 :(得分:0)
如果您在上传时有多个文件,则必须使用foreach。并且你应该在表的列中输入文件的实际名称,并且必须存储该名称的加密值以避免在目录中重复..这样的东西..
$userdocs->document_name = UploadedFile::getInstances($userdocs, 'document_name');
foreach ($userdocs->document_name as $key => $file) {
$img_name = Yii::$app->security->generateRandomString();
$file->saveAs('user/business_files/' . $img_name . '.' . $file->extension);
$images = $img_name . '.' . $file->extension;
$userdocs->actual_name = $file->name;
$userdocs->user_id = $user->id;
$userdocs->document_name = $images;
$userdocs->save(false);
$userdocs = new UserDocs();
}
这里生成一个随机字符串,它将与文档名称一起分配,并将存储在表格中。 UserDocs 是型号名称。