Yii2 dropdown multiple selected values

Question

I used Yii2 multiple selection dropdown , it is working fine at create but not showing me selected values on update!

Form:

       $form->field($model, 'categories[]')            
         ->dropDownList($model->CategoryDropdown,
         [
          'multiple'=>'multiple'
          'class'=>'chosen-select input-md required',              
         ]             
        )->label("Add Categories");

Model:

public function getCategoryDropdown()
{
        $listCategory   = Category::find()->select('ID,name')
            ->where(['is_subcategory' => 'Yes'])
            ->andWhere(['status' => 'active','approved' => 'active'])
            ->all();
        $list   = ArrayHelper::map( $listCategory,'ID','name');

        return $list;
}

Controller:

 public function actionCreate(){
 ...
     $model->categories = implode(",",$_POST['Company']['categories']);
    ...
    return $this->render('create', [
            'model' => $model,           
        ]);
 }

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

    echo $model->categories; //  1,2,4,5  values already assigned
    ...
    return $this->render('update', [
                'model' => $model,                    
            ]); 
  }

Database:

1,2,4,5

How I can show multi selected values in dropdown when I update my recored?

no logic used in update action but I'm updating my question. — Muhammad Shahzad, Oct 29 '15 at 06:39
is there any option? to explode these values in dropdown? like: dropDownList($model, 'categories', ''explode(",",$model->categories), — Muhammad Shahzad, Oct 29 '15 at 06:45
The problem is related with how to retrive the selected value and then assign it to the "model"....... — scaisEdge, Oct 29 '15 at 06:59
Yes but they are an imploded string non an array of value for "selected" management — scaisEdge, Oct 29 '15 at 07:07
I got the solution, just removed '[]' from $form->field($model, 'categories[]') replaced with $form->field($model, 'categories') , it is working now. — Muhammad Shahzad, Oct 29 '15 at 07:25
@EjazKarim company is a "model", i have a company table in database. — Muhammad Shahzad, Feb 08 '17 at 13:12

score 12 · Accepted Answer · edited Feb 10 '17 at 15:47

12

all your code is ok just need echo your $form->...

echo $form->field($model, 'categories[]')            
     ->dropDownList($model->CategoryDropdown,
     [
      'multiple'=>'multiple',
      'class'=>'chosen-select input-md required',              
     ]             
    )->label("Add Categories");

or use <?= ?> in view!

edited Feb 10 '17 at 15:47

Deep Kakkar

4,538
4
26
58

answered Oct 29 '15 at 06:52

mohsen

971
12
39

1

You should use $form->field($Item, 'categories')->listBox($dropdown_data); – mohsen Oct 29 '15 at 07:01
I should need to use listBox. – Muhammad Shahzad Oct 29 '15 at 07:20

score 2 · Answer 2 · answered Oct 29 '15 at 07:31

Here is solution:

Form

 <?= 
  $form->field($model, 'categories')            
         ->dropDownList($model->CategoryDropdown,
         [
          'class'=>'chosen-select input-md required',
          'multiple'=>'multiple'              
         ]             
        )->label("Add Categories");
 ?>

Controller:

 public function actionCreate(){
 ...
     $model->categories = implode(",",$_POST['Company']['categories']);
    ...
    return $this->render('create', [
            'model' => $model,           
        ]);
 }

public function actionUpdate($id)
{
    $model = $this->findModel($id); 
    $model->categories = explode(',', $model->categories);        
    ...
    if($model->load(Yii::$app->request->post()))
    {
         $model->categories = implode(",",$_POST['Company']['categories']);    
         ...
         $model->save()
    }
    return $this->render('update', [
                'model' => $model,                    
            ]); 
  }

*@Shahzad Bhai*, How To Show Selected Values In Dropdown (Which Is Multi Select). Do You Have Any Idea Or Any Link.? Means, Whatever Values I Selected From Multi Select Dropdown, I wanted Those Values While Updating Time. — Nana Partykar, Jun 21 '16 at 10:08
@NanaPartykar I have used a single column in db like category and store values comma separated 4,3,6,5 and I have used bootstrap chosen-select in my form, and above code was working fine for me. — Muhammad Shahzad, Jun 21 '16 at 16:52

score 1 · Answer 3 · answered Jan 28 '21 at 09:46

I would highly recommend to use Select2 from krajee it has all the options that you might need, using multiple in dropDownList() will make you able to choose multiple values but by pressing and holding Ctrl and choosing which is not comfortable as choosing them using Select2.

They did an amazing job i highly recommend anyone with this problem to use it.

Please check the documentations. https://demos.krajee.com/widget-details/select2

Yii2 dropdown multiple selected values

3 Answers3