php - How to control template in gridview yii2 advanced template? -


i want give if condition control action buttons(view, edit , delete) in template attribute , add new buttons. have code, wrong:

[     'class' => 'yii\grid\actioncolumn',     'template'=>function ($session){         if($session->get('usertype') != 'admin'){             '{view}{update}{delete}';         }else{              'template' => '{view}{update}{delete}{activate}{deactivate}',             'buttons' => [                 'deactivate' => function ($url,\backend\models\document $model) {                     if($model->status==1)                         return html::a('<span class="glyphicon  glyphicon glyphicon-remove"></span>', $url, [                             'title' => yii::t('app', 'deactivate'),                         ]);                     },                 'activate' => function ($url, $model) {                     if($model->status==0)                         return html::a('<span class="glyphicon glyphicon glyphicon-ok"></span>', $url, [                             'title' => yii::t('app', 'activate'),                         ]);                     },                 ],             }         },     ],

but got error :

object of class closure not converted string

i using session object parameter in function. how fix that, or perfect way check if condition?

don't use anonymous function 

 'template'=>function ( ... ) {}

but call external function or directly use proper assigment code eg: 

'template'=> (if($session->get('usertype') != 'admin')) ? '{view}{update}{delete}' : '{view}{update}{delete}{activate}{deactivate}',   public function mytemplate($session){    ....    return yourresult;  }

then 

'template'=> mytemplate($session),

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