Upload behavior for Yii 2

This behavior automatically uploads file and fills the specified attribute with a value of the name of the uploaded file. This code is inspired by, but not derived from, https://github.com/yii-dream-team/yii2-upload-behavior.

Installation

The preferred way to install this extension via composer.

Either run

php composer.phar require --prefer-dist mongosoft/yii2-upload-behavior "*"

or add this code line to the require section of your composer.json file:

"mongosoft/yii2-upload-behavior": "*"

Usage

Upload file

Attach the behavior in your model:

class Document extends ActiveRecord
{
    /**
     * @inheritdoc
     */
    public function rules()
    {
        return [
            ['file', 'file', 'extensions' => 'doc, docx, pdf', 'on' => ['insert', 'update']],
        ];
    }

    /**
     * @return \yii\db\ActiveQuery
     */
    public function getCategory()
    {
        return $this->hasOne(Category::className(), [ 'id' => 'id_category' ]);
    }

    /**
     * @inheritdoc
     */
    function behaviors()
    {
        return [
            [
                'class' => UploadBehavior::className(),
                'attribute' => 'file',
                'scenarios' => ['insert', 'update'],
                'path' => '@webroot/upload/docs/{category.id}',
                'url' => '@web/upload/docs/{category.id}',
            ],
        ];
    }
}

Set model scenario in controller action:

class Controller extends Controller
{
    public function actionCreate($id)
    {
        $model = $this->findModel($id);
        $model->setScenario('insert'); // Note! Set upload behavior scenario.
        
        ...
        ...
    }
}

Example view file:

<?php $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]); ?>
    <?= $form->field($model, 'image')->fileInput() ?>
    <div class="form-group">
        <?= Html::submitButton('Submit', ['class' => 'btn btn-primary']) ?>
    </div>
<?php ActiveForm::end(); ?>

Upload image and create thumbnails

Attach the behavior in your model:

class User extends ActiveRecord
{
    /**
     * @inheritdoc
     */
    public function rules()
    {
        return [
            ['image', 'image', 'extensions' => 'jpg, jpeg, gif, png', 'on' => ['insert', 'update']],
        ];
    }

    /**
     * @inheritdoc
     */
    public function behaviors()
    {
        return [
            [
                'class' => \mongosoft\file\UploadImageBehavior::className(),
                'attribute' => 'image',
                'scenarios' => ['insert', 'update'],
                'placeholder' => '@app/modules/user/assets/images/userpic.jpg',
                'path' => '@webroot/upload/user/{id}',
                'url' => '@web/upload/user/{id}',
                'thumbs' => [
                    'thumb' => ['width' => 400, 'quality' => 90],
                    'preview' => ['width' => 200, 'height' => 200],
                    'news_thumb' => ['width' => 200, 'height' => 200, 'bg_color' => '000'],
                ],
            ],
        ];
    }
}

Example view file:

<?php $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]); ?>
    <div class="form-group">
        <div class="row">
            <div class="col-lg-6">
                <!-- Original image -->
                <?= Html::img($model->getUploadUrl('image'), ['class' => 'img-thumbnail']) ?>
            </div>
            <div class="col-lg-4">
                <!-- Thumb 1 (thumb profile) -->
                <?= Html::img($model->getThumbUploadUrl('image'), ['class' => 'img-thumbnail']) ?>
            </div>
            <div class="col-lg-2">
                <!-- Thumb 2 (preview profile) -->
                <?= Html::img($model->getThumbUploadUrl('image', 'preview'), ['class' => 'img-thumbnail']) ?>
            </div>
        </div>
    </div>
    <?= $form->field($model, 'image')->fileInput(['accept' => 'image/*']) ?>
    <div class="form-group">
        <?= Html::submitButton('Submit', ['class' => 'btn btn-primary']) ?>
    </div>
<?php ActiveForm::end(); ?>

Behavior Options

attribute - The attribute which holds the attachment
scenarios - The scenarios in which the behavior will be triggered
instanceByName - Getting file instance by name, If you use UploadBehavior in RESTfull application and you do not need a prefix of the model name, set the property instanceByName = false, default value is false
path - the base path or path alias to the directory in which to save files.
url - the base URL or path alias for this file
generateNewName - Set true or anonymous function takes the old filename and returns a new name, default value is true
unlinkOnSave - If true current attribute file will be deleted, default value is true
unlinkOnDelete - If true current attribute file will be deleted after model deletion.

Attention!

It is prefered to use immutable placeholder in url and path options, other words try don't use related attributes that can be changed. There's bad practice. For example:

class Track extends ActiveRecord
{
    public function getArtist()
    {
        return $this->hasOne(Artist::className(), [ 'id' => 'id_artist' ]);
    }

    public function behaviors()
    {
        return [
            [
                'class' => UploadBehavior::className(),
                'attribute' => 'image',
                'scenarios' => ['default'],
                'path' => '@webroot/uploads/{artist.slug}',
                'url' => '@web/uploads/{artist.slug}',
            ],
        ];
    }
}

If related model attribute slug will change, you must change folders' names too, otherwise behavior will works not correctly.