Yii2- Hide admin settings based on user role - yii2

Question

I have a tree in which I am displaying nodes and their child nodes. I want to hide the non admin options to a user whose not an admin. By default, the isAdmin is true. For checking user roles I have done the following.
<?=
TreeView::widget([
'query' => \common\models\MdcNode::find()->addOrderBy('root, lft'),
'headingOptions' => ['label' => 'Root'],
'rootOptions' => ['label'=>'<span class="text-primary">Root</span>'],
'topRootAsHeading' => true, // this will override the headingOptions
'fontAwesome' => true,
'isAdmin' => function(){
if (Yii::$app->user->identity->user_role == 1)
{
return true;
}
else
{
return false;
}
},
'iconEditSettings'=> [
'show' => 'list',
'listData' => [
'building' => 'Building',
'folder' => 'Floor',
'user' => 'Customer'
]
],
'softDelete' => true,
'cacheSettings' => ['enableCache' => true]
]);
?>
Now when I run my code. I am getting below error when I click on the node
Operation Disallowed
Invalid request signature detected during tree data manage action! Please refresh the page and retry.
OLD HASH:
785a3cf9cbb1a90e862b718ed8ae3289944280448ae801de49d686aa5f70e951common\models\MdcNodehidebtn-default/mdc/backend/web/treemanager/node/save/mdc/backend/web/mdcnode/index#kvtree/views/_formw0-nodeselnodenodes<div class="kv-node-message">No valid nodes are available for display. Use toolbar buttons to add nodes.</div>111111{"id":"w0-nodeform"}{"1":"","2":"","3":"","4":"","5":""}{"submit":"<i class=\"glyphicon glyphicon-floppy-disk\"></i>","reset":"<i class=\"glyphicon glyphicon-repeat\"></i>"}a:0:{}[]list{"":"<em>Default</em> ( <span class=\"text-warning kv-node-icon kv-icon-parent\"><i class=\"fa fa-folder-close kv-node-closed\"></i></span> / <span class=\"text-warning kv-node-icon kv-icon-parent\"><i class=\"fa fa-folder-open kv-node-opened\"></i></span> / <span class=\"text-info kv-node-icon kv-icon-child\"><i class=\"fa fa-file\"></i></span>)","building":"<span class=\"fa fa-building\"></span> Building","folder":"<span class=\"fa fa-folder\"></span> Floor","user":"<span class=\"fa fa-user\"></span> Customer"}{"depth":"","glue":" » ","activeCss":"kv-crumb-active","untitled":"Untitled"}
NEW HASH:
e3037c327c2ddec080a38ce50002f825a214352f833f2acfe972c3d7d0a2b9abcommon\models\MdcNodehidebtn-default/mdc/backend/web/treemanager/node/save/mdc/backend/web/mdcnode/index#kvtree/views/_formw0-nodeselnodenodes<div class="kv-node-message">No valid nodes are available for display. Use toolbar buttons to add nodes.</div>11111{"id":"w0-nodeform"}{"1":"","2":"","3":"","4":"","5":""}{"submit":"<i class=\"glyphicon glyphicon-floppy-disk\"></i>","reset":"<i class=\"glyphicon glyphicon-repeat\"></i>"}a:0:{}[]list{"":"<em>Default</em> ( <span class=\"text-warning kv-node-icon kv-icon-parent\"><i class=\"fa fa-folder-close kv-node-closed\"></i></span> / <span class=\"text-warning kv-node-icon kv-icon-parent\"><i class=\"fa fa-folder-open kv-node-opened\"></i></span> / <span class=\"text-info kv-node-icon kv-icon-child\"><i class=\"fa fa-file\"></i></span>)","building":"<span class=\"fa fa-building\"></span> Building","folder":"<span class=\"fa fa-folder\"></span> Floor","user":"<span class=\"fa fa-user\"></span> Customer"}{"depth":"","glue":" » ","activeCss":"kv-crumb-active","untitled":"Untitled"}
Update 1
Below is my user model
class User extends ActiveRecord implements IdentityInterface
{
const STATUS_DELETED = 0;
const STATUS_ACTIVE = 10;
/**
* #inheritdoc
*/
public static function tableName()
{
return '{{%user}}';
}
/**
* #inheritdoc
*/
public function behaviors()
{
return [
TimestampBehavior::className(),
];
}
/**
* #inheritdoc
*/
public function rules()
{
return [
['status', 'default', 'value' => self::STATUS_ACTIVE],
['status', 'in', 'range' => [self::STATUS_ACTIVE, self::STATUS_DELETED]],
];
}
/**
* #inheritdoc
*/
public static function findIdentity($id)
{
return static::findOne(['id' => $id, 'status' => self::STATUS_ACTIVE]);
}
/**
* #inheritdoc
*/
public static function findIdentityByAccessToken($token, $type = null)
{
return static::findOne(['auth_key' => $token]);
}
/**
* Finds user by username
*
* #param string $username
* #return static|null
*/
public static function findByUsername($username)
{
return static::findOne(['username' => $username, 'status' => self::STATUS_ACTIVE]);
}
/**
* Finds user by password reset token
*
* #param string $token password reset token
* #return static|null
*/
public static function findByPasswordResetToken($token)
{
if (!static::isPasswordResetTokenValid($token)) {
return null;
}
return static::findOne([
'password_reset_token' => $token,
'status' => self::STATUS_ACTIVE,
]);
}
/**
* Finds out if password reset token is valid
*
* #param string $token password reset token
* #return bool
*/
public static function isPasswordResetTokenValid($token)
{
if (empty($token)) {
return false;
}
$timestamp = (int) substr($token, strrpos($token, '_') + 1);
$expire = Yii::$app->params['user.passwordResetTokenExpire'];
return $timestamp + $expire >= time();
}
/**
* #inheritdoc
*/
public function getId()
{
return $this->getPrimaryKey();
}
/**
* #inheritdoc
*/
public function getAuthKey()
{
return $this->auth_key;
}
/**
* #inheritdoc
*/
public function validateAuthKey($authKey)
{
return $this->getAuthKey() === $authKey;
}
/**
* Validates password
*
* #param string $password password to validate
* #return bool if password provided is valid for current user
*/
public function validatePassword($password)
{
return Yii::$app->security->validatePassword($password, $this->password_hash);
}
/**
* Generates password hash from password and sets it to the model
*
* #param string $password
*/
public function setPassword($password)
{
$this->password_hash = Yii::$app->security->generatePasswordHash($password);
}
/**
* Generates "remember me" authentication key
*/
public function generateAuthKey()
{
$this->auth_key = Yii::$app->security->generateRandomString();
}
/**
* Generates new password reset token
*/
public function generatePasswordResetToken()
{
$this->password_reset_token = Yii::$app->security->generateRandomString() . '_' . time();
}
/**
* Removes password reset token
*/
public function removePasswordResetToken()
{
$this->password_reset_token = null;
}
public static function toArrayList()
{
return ArrayHelper::map(self::find()->where(['user_role'=>2,'status'=>10])->all(),'id','username');
}
}
User Table Structure
RBAC Model
class Rbac extends \yii\db\ActiveRecord
{
/**
* #inheritdoc
*/
public static function tableName()
{
return 'rbac';
}
/**
* #inheritdoc
*/
public function rules()
{
return [
[['controller', 'action'], 'string', 'max' => 50],
[['roles'], 'string', 'max' => 255],
];
}
/**
* #inheritdoc
*/
public function attributeLabels()
{
return [
'id' => 'ID',
'controller' => 'Controller',
'action' => 'Action',
'roles' => 'Roles',
];
}
public static function allowAccess($c,$a){
$sql= /** #lang text */
"select count(*) as total from rbac where (controller='$c' and action='$a') and (roles = '' OR roles IS NULL OR FIND_IN_SET(". Yii::$app->user->identity->user_role . ",roles)<>0)";
$rbac = Yii::$app->db->createCommand($sql);
$r = $rbac->queryOne();
return $r['total'] > 0;
}
}