Yii2 Search model, Invalid argument supplied for foreach - php

Question

I am new at Yii framework and I am facing this problem that when i am creating search model to add filters and sorting, it's not working, i already have tried this solution Yii2 ActiveDataProvider - Invalid argument supplied for foreach() and even generated the new models and controller but the result is same, it did not work.
Please have a look at the code and kindly tell me what i am doing wrong.
Controller
namespace backend\controllers;
use Yii;
use backend\models\Contacts;
use backend\models\ContactsSearch;
use yii\web\Controller;
use yii\web\NotFoundHttpException;
use yii\filters\VerbFilter;
/**
* ContactsController implements the CRUD actions for Contacts model.
*/
class ContactsController extends Controller
{
...
/**
* Lists all Contacts models.
* #return mixed
*/
public function actionIndex()
{
$searchModel = new ContactsSearch();
$dataProvider = $searchModel->search(Yii::$app->request->queryParams);
return $this->render('index', [
'searchModel' => $searchModel,
'dataProvider' => $dataProvider
]);
}
...
}
Model
namespace backend\models;
use Yii;
use backend\models\User;
/**
* This is the model class for table "user_contacts".
*
* #property string $id
* #property string $user_id
* #property string $contact_id
* #property string $created_on
* #property string $modified_on
*
* #property User $contact
* #property User $user
*/
class Contacts extends \yii\db\ActiveRecord
{
/**
* #inheritdoc
*/
public static function tableName()
{
return 'user_contacts';
}
/**
* #inheritdoc
*/
public function rules()
{
return [
[['user_id', 'contact_id'], 'integer'],
[['created_on', 'modified_on'], 'safe'],
[['user_id', 'contact_id'], 'unique', 'targetAttribute' => ['user_id', 'contact_id'], 'message' => 'The combination of User ID and Contact ID has already been taken.']
];
}
/**
* #inheritdoc
*/
public function attributeLabels()
{
return [
'id' => Yii::t('app', 'ID'),
'user_id' => Yii::t('app', 'User ID'),
'contact_id' => Yii::t('app', 'Contact ID'),
'created_on' => Yii::t('app', 'Created On'),
'modified_on' => Yii::t('app', 'Modified On')
];
}
/**
* #return \yii\db\ActiveQuery
*/
public function getContact()
{
return $this->hasOne(User::className(), ['id' => 'contact_id']);
}
/**
* #return \yii\db\ActiveQuery
*/
public function getUser()
{
return $this->hasOne(User::className(), ['id' => 'user_id']);
}
/**
* #inheritdoc
* #return ContactsSearch the active query used by this AR class.
*/
public static function find()
{
return new ContactsSearch(get_called_class());
}
}
Search model
namespace backend\models;
use Yii;
use yii\base\Model;
use yii\data\ActiveDataProvider;
use backend\models\Contacts;
/**
* ContactsSearch represents the model behind the search form about `backend\models\Contacts`.
*/
class ContactsSearch extends Contacts
{
/**
* #inheritdoc
*/
public function rules()
{
return [
[['id', 'user_id', 'contact_id'], 'integer'],
[['created_on', 'modified_on'], 'safe']
];
}
/**
* #inheritdoc
*/
public function scenarios()
{
// bypass scenarios() implementation in the parent class
return Model::scenarios();
}
/**
* Creates data provider instance with search query applied
*
* #param array $params
*
* #return ActiveDataProvider
*/
public function search($params)
{
$query = Contacts::find();
$dataProvider = new ActiveDataProvider([
'query' => $query
]);
$this->load($params);
if(!$this->validate())
{
// uncomment the following line if you do not want to return any records when validation fails
// $query->where('0=1');
return $dataProvider;
}
$query->andFilterWhere([
'id' => $this->id,
'user_id' => $this->user_id,
'contact_id' => $this->contact_id,
'created_on' => $this->created_on,
'modified_on' => $this->modified_on
]);
return $dataProvider;
}
}
View(index.php)
echo GridView::widget([
'dataProvider' => $dataProvider,
'filterModel' => $searchModel,
'columns' => [
['class' => 'yii\grid\SerialColumn'],
'id',
'user_id',
'contact_id',
'created_on',
'modified_on',
['class' => 'yii\grid\ActionColumn']
]
]);
Error
PHP Warning – yii\base\ErrorException
Invalid argument supplied for foreach()
1. in F:\Files\Web\PHP\wamp\www\Php\sites\expenses\vendor\yiisoft\yii2\BaseYii.php at line 517
public static function configure($object, $properties)
{
foreach ($properties as $name => $value) {
$object->$name = $value;
}
return $object;
}
2. in F:\Files\Web\PHP\wamp\www\Php\sites\expenses\backend\models\Contacts.php at line 76 – yii\base\Object::__construct()
public static function find()
{
return new ContactsSearch(get_called_class());
}
3. in F:\Files\Web\PHP\wamp\www\Php\sites\expenses\backend\models\ContactsSearch.php at line 43 – backend\models\Contacts::find()
public function search($params)
{
$query = Contacts::find();
$dataProvider = new ActiveDataProvider([
'query' => $query
]);
$this->load($params);
...