php - Related Models through Junction Table yii2
one text
i have 3 tables for equipments, a table for users, and a table user_equipment_mapping.
Equipments: 1.Laptop: PK - Id, laptop_model, laptop_series, laptop_date_acq 2.Display: PK - ID, display_model, display_series, display_date_acq 3.Phone : PK - ID, phone_model, phone_series, phone_date_acq
User: ID - PK , username, password
User_Equipment_mapping : ID - PK, user_id - FK(id from tbl user), laptop_id - FK(id from tbl laptop), display_id - FK (id from tbl display), phone_id - FK (id from tbl phone), start_date, end_date.
For me this is a many-many relationship.
I want to get in userequipment/create an array of users through junction table so i can assign the equipments to an user using dropdown in gridview. I need your help getting users in create, i have created a method in clas UserEquipmentMapping and tried to print_r($users) in view but it gets me the follwing error : Using $this when not in object context.
Thank you for any suggestions in advance!
Controller :
<?php
namespace app\controllers;
use Yii;
use app\models\UserEquipmentMapping;
use app\models\UserequipmentmappingSearch;
use yii\web\Controller;
use yii\web\NotFoundHttpException;
use yii\filters\VerbFilter;
/**
* UserequipmentmappingController implements the CRUD actions for UserEquipmentMapping model.
*/
class UserequipmentmappingController extends Controller
{
/**
* {@inheritdoc}
*/
public function behaviors()
{
return [
'verbs' => [
'class' => VerbFilter::className(),
'actions' => [
'delete' => ['POST'],
],
],
];
}
/**
* Lists all UserEquipmentMapping models.
* @return mixed
*/
public function actionIndex()
{
$searchModel = new UserequipmentmappingSearch();
$dataProvider = $searchModel->search(Yii::$app->request->queryParams);
return $this->render('index', [
'searchModel' => $searchModel,
'dataProvider' => $dataProvider,
]);
}
/**
* Displays a single UserEquipmentMapping model.
* @param integer $id
* @return mixed
* @throws NotFoundHttpException if the model cannot be found
*/
public function actionView($id)
{
return $this->render('view', [
'model' => $this->findModel($id),
]);
}
/**
* Creates a new UserEquipmentMapping model.
* If creation is successful, the browser will be redirected to the 'view' page.
* @return mixed
*/
public function actionCreate()
{
$model = new UserEquipmentMapping();
if ($model->load(Yii::$app->request->post()) && $model->save()) {
return $this->redirect(['view', 'id' => $model->id]);
}
return $this->render('create', [
'model' => $model,
]);
}
/**
* Updates an existing UserEquipmentMapping model.
* If update is successful, the browser will be redirected to the 'view' page.
* @param integer $id
* @return mixed
* @throws NotFoundHttpException if the model cannot be found
*/
public function actionUpdate($id)
{
$model = $this->findModel($id);
if ($model->load(Yii::$app->request->post()) && $model->save()) {
return $this->redirect(['view', 'id' => $model->id]);
}
return $this->render('update', [
'model' => $model,
]);
}
/**
* Deletes an existing UserEquipmentMapping model.
* If deletion is successful, the browser will be redirected to the 'index' page.
* @param integer $id
* @return mixed
* @throws NotFoundHttpException if the model cannot be found
*/
public function actionDelete($id)
{
$this->findModel($id)->delete();
return $this->redirect(['index']);
}
/**
* Finds the UserEquipmentMapping model based on its primary key value.
* If the model is not found, a 404 HTTP exception will be thrown.
* @param integer $id
* @return UserEquipmentMapping the loaded model
* @throws NotFoundHttpException if the model cannot be found
*/
protected function findModel($id)
{
if (($model = UserEquipmentMapping::findOne($id)) !== null) {
return $model;
}
throw new NotFoundHttpException('The requested page does not exist.');
}
}
Model :
<?php
namespace app\models;
use Yii;
/**
* This is the model class for table "user_equipment_mapping".
*
* @property int $id
* @property int $user_id
* @property int|null $laptop_id
* @property int|null $phone_id
* @property int|null $display_id
* @property string|null $start_date
* @property string|null $stop_date
*
* @property Display $display
* @property Laptop $laptop
* @property Phone $phone
* @property User $user
*/
class UserEquipmentMapping extends \yii\db\ActiveRecord
{
/**
* {@inheritdoc}
*/
public static function tableName()
{
return 'user_equipment_mapping';
}
/**
* {@inheritdoc}
*/
public function rules()
{
return [
[['user_id'], 'required'],
[['user_id', 'laptop_id', 'phone_id', 'display_id'], 'integer'],
[['start_date', 'stop_date'], 'safe'],
[['display_id'], 'exist', 'skipOnError' => true, 'targetClass' => Display::className(), 'targetAttribute' => ['display_id' => 'id']],
[['laptop_id'], 'exist', 'skipOnError' => true, 'targetClass' => Laptop::className(), 'targetAttribute' => ['laptop_id' => 'id']],
[['phone_id'], 'exist', 'skipOnError' => true, 'targetClass' => Phone::className(), 'targetAttribute' => ['phone_id' => 'id']],
[['user_id'], 'exist', 'skipOnError' => true, 'targetClass' => User::className(), 'targetAttribute' => ['user_id' => 'id']],
];
}
/**
* {@inheritdoc}
*/
public function attributeLabels()
{
return [
'id' => 'ID',
'user_id' => 'User ID',
'laptop_id' => 'Laptop ID',
'phone_id' => 'Phone ID',
'display_id' => 'Display ID',
'start_date' => 'Start Date',
'stop_date' => 'Stop Date',
];
}
/**
* Gets query for [[Display]].
*
* @return \yii\db\ActiveQuery|DisplayQuery
*/
public function getDisplay()
{
return $this->hasOne(Display::className(), ['id' => 'display_id']);
}
/**
* Gets query for [[Laptop]].
*
* @return \yii\db\ActiveQuery|LaptopQuery
*/
public function getLaptop()
{
return $this->hasOne(Laptop::className(), ['id' => 'laptop_id']);
}
/**
* Gets query for [[Phone]].
*
* @return \yii\db\ActiveQuery|PhoneQuery
*/
public function getPhone()
{
return $this->hasOne(Phone::className(), ['id' => 'phone_id']);
}
/**
* Gets query for [[User]].
*
* @return \yii\db\ActiveQuery|UserQuery
*/
public function getUser()
{
return $this->hasOne(User::className(), ['id' => 'user_id']);
}
public function getUsername()
{
return $this->hasMany(User::className(),['user_id' => 'id'])
->viaTable('user');
}
/**
* {@inheritdoc}
* @return UserEquipmentMappingQuery the active query used by this AR class.
*/
public static function find()
{
return new UserEquipmentMappingQuery(get_called_class());
}
}
Create :
<?php
use yii\helpers\Html;
/* @var $this yii\web\View */
/* @var $model app\models\UserEquipmentMapping */
$this->title = 'Create User Equipment Mapping';
$this->params['breadcrumbs'][] = ['label' => 'User Equipment Mappings', 'url' => ['index']];
$this->params['breadcrumbs'][] = $this->title;
?>
<?php
use app\models\UserEquipmentMapping;
$users =UserEquipmentMapping::getUsername();
print_r($users);die;
?>
<div class="user-equipment-mapping-create">
<h1><?= Html::encode($this->title) ?></h1>
<?= $this->render('_form', [
'model' => $model,
]) ?>
</div>