php - Yii 2 file input renders hidden file input tag -

i using yii2 build simple application signup feature. problem when render file input tag using active forms, render file input field , hidden field. validator picks 1 hidden , says profile image required though saves in upload directory , adds path database still returns error. help.

here code: view:

<?php $form = activeform::begin(['id' => 'form-signup' , 'options' => ['enctype' => 'multipart/form-data']]); ?>     <?= $form->field($model, 'username') ?>     <?= $form->field($model, 'email') ?>    <?= $form->field($model, 'profile_path')->widget(fileinput::classname(), [                     'options' => ['accept' => 'image/*'],                 ]); ?>    <?= $form->field($model, 'password')->passwordinput() ?>    <div class="form-group">    <?= html::submitbutton('signup', ['class' => 'btn btn-primary', 'name' => 'signup-button']) ?>     </div> <?php activeform::end(); ?> 

signupform // model class

class signupform extends model {     public $username;     public $email;     public $password;     public $profile_path;  /**  * @inheritdoc  */ public function rules() {     return [         ['username', 'filter', 'filter' => 'trim'],         ['username', 'required'],         ['username', 'unique', 'targetclass' => '\common\models\user', 'message' => 'this username has been taken.'],         ['username', 'string', 'min' => 2, 'max' => 255],          ['email', 'filter', 'filter' => 'trim'],         ['email', 'required'],         ['email', 'email'],         ['email', 'string', 'max' => 255],         ['email', 'unique', 'targetclass' => '\common\models\user', 'message' => 'this email address has been taken.'],          ['password', 'required'],         ['password', 'string', 'min' => 6],         [['profile_path'], 'file', 'skiponempty' => false, 'extensions' => 'png, jpg'],     ]; }  /**  * signs user up.  *  * @return user|null saved model or null if saving fails  */ public function signup() {     if ($this->validate()) {         $user = new user();         $user->username = $this->username;         $user->email = $this->email;         $user->setpassword($this->password);         $user->generateauthkey();         $user->setprofilepicture($this->profile_path);         if ($user->save(false)) {             return $user;         }     }      return null; }  public function upload() {     if ($this->validate()) {         $this->profile_path->saveas('uploads/' . $this->profile_path->basename . date('y-m-d h:i:s') . '.' . $this->profile_path->extension);         $this->profile_path = 'uploads/' . $this->profile_path->basename . '.' . $this->profile_path->extension;          return true;     } else {         return false;     } } 

}

output:

<label class="control-label" for="signupform-profile_path">profile path</label> <input type="hidden" value="" name="signupform[profile_path]"> <input id="signupform-profile_path" type="file" name="signupform[profile_path]"> <p class="help-block help-block-error">please upload file.</p> 

i think should use different scenario avoiding validation of input hidden when not necessary.. see doc brief guide

and sample of scenario use

define rules , scenarios

<?php  class user extends model {     public $name;     public $email;     public $password;      public function rules(){         return [             [['name','email','password'],'required'],             ['email','email'],             [['name', 'email', 'password'], 'required', 'on' => 'register'],             ];     }     public function scenarios()     {         $scenarios = parent::scenarios();         $scenarios['login'] = ['name','password'];//scenario values accepted         return $scenarios;     } } ?> 

apply scenario

<?php ... class usercontroller extends controller {     ..     // apply scenarios     // scenario set property     ............     public function  actionlogin(){         $model = new user;         $model->scenario = 'login';         .............     }     // scenario set through configuration     public function  actionregister(){         $model = new user(['scenario' => 'register']);         ..............     } } 

in login scenario name , password required in register scenario name, email , password required