How to Basic CRUD operation in many-to-many relation in Yii2? - php

Question

Hello to everyone out there I am new to Yii2. I just started learning Yii2 and got stuck in a condition where i have to use CRUD operation in case where I am having many-to-many relation in the backend. I was trying to solve it but not able to understand how I can d this. Below I am writting the strcuture of my tables and the code.
Table
1. test_role
id->first column
role_name->second column
2. test_user
id->primary column
user_name
3.user_role
id->primary key
user_id ->foreign key(primary key of test_user)
role_id ->foreign key(primary key of test_role)
And there is many-to-many relation between roles and users means to say that a user can have multiple roles and a role can be assigned to multiple users.
Based on this i have created the following models.
Model 1 TestRolephp
<?php
namespace app\models;
use Yii;
/**
* This is the model class for table "test_role".
*
* #property integer $id
* #property string $role_name
*
* #property TestUserRole[] $testUserRoles
*/
class TestRole extends \yii\db\ActiveRecord
{
/**
* #inheritdoc
*/
public static function tableName()
{
return 'test_role';
}
/**
* #inheritdoc
*/
public function rules()
{
return [
[['role_name'], 'required'],
[['role_name'], 'string', 'max' => 200],
];
}
/**
* #inheritdoc
*/
public function attributeLabels()
{
return [
'id' => 'ID',
'role_name' => 'Role Name',
];
}
/**
* #return \yii\db\ActiveQuery
*/
public function getTestUserRoles()
{
return $this->hasMany(TestUserRole::className(), ['role_id' => 'id']);
}
}
Model 2 TestUser.php
<?php
namespace app\models;
use Yii;
/**
* This is the model class for table "test_user".
*
* #property integer $id
* #property string $username
*
* #property TestUserRole[] $testUserRoles
*/
class TestUser extends \yii\db\ActiveRecord
{
/**
* #inheritdoc
*/
public static function tableName()
{
return 'test_user';
}
/**
* #inheritdoc
*/
public function rules()
{
return [
[['username'], 'required'],
[['username'], 'string', 'max' => 200],
];
}
/**
* #inheritdoc
*/
public function attributeLabels()
{
return [
'id' => 'ID',
'username' => 'Username',
];
}
/**
* #return \yii\db\ActiveQuery
*/
public function getTestUserRoles()
{
return $this->hasMany(TestUserRole::className(), ['user_id' => 'id']);
}
}
Below are the controllers
Controller 1 TestUserController.php
<?php
namespace app\controllers;
use Yii;
use app\models\TestUser;
use app\models\TestUserSearch;
use yii\web\Controller;
use yii\web\NotFoundHttpException;
use yii\filters\VerbFilter;
/**
* TestUserController implements the CRUD actions for TestUser model.
*/
class TestUserController extends Controller
{
/**
* #inheritdoc
*/
public function behaviors()
{
return [
'verbs' => [
'class' => VerbFilter::className(),
'actions' => [
'delete' => ['POST'],
],
],
];
}
/**
* Lists all TestUser models.
* #return mixed
*/
public function actionIndex()
{
$searchModel = new TestUserSearch();
$dataProvider = $searchModel->search(Yii::$app->request->queryParams);
return $this->render('index', [
'searchModel' => $searchModel,
'dataProvider' => $dataProvider,
]);
}
/**
* Displays a single TestUser model.
* #param integer $id
* #return mixed
*/
public function actionView($id)
{
return $this->render('view', [
'model' => $this->findModel($id),
]);
}
/**
* Creates a new TestUser model.
* If creation is successful, the browser will be redirected to the 'view' page.
* #return mixed
*/
public function actionCreate()
{
$model = new TestUser();
if ($model->load(Yii::$app->request->post()) && $model->save()) {
return $this->redirect(['view', 'id' => $model->id]);
} else {
return $this->render('create', [
'model' => $model,
]);
}
}
/**
* Updates an existing TestUser model.
* If update is successful, the browser will be redirected to the 'view' page.
* #param integer $id
* #return mixed
*/
public function actionUpdate($id)
{
$model = $this->findModel($id);
if ($model->load(Yii::$app->request->post()) && $model->save()) {
return $this->redirect(['view', 'id' => $model->id]);
} else {
return $this->render('update', [
'model' => $model,
]);
}
}
/**
* Deletes an existing TestUser model.
* If deletion is successful, the browser will be redirected to the 'index' page.
* #param integer $id
* #return mixed
*/
public function actionDelete($id)
{
$this->findModel($id)->delete();
return $this->redirect(['index']);
}
/**
* Finds the TestUser model based on its primary key value.
* If the model is not found, a 404 HTTP exception will be thrown.
* #param integer $id
* #return TestUser the loaded model
* #throws NotFoundHttpException if the model cannot be found
*/
protected function findModel($id)
{
if (($model = TestUser::findOne($id)) !== null) {
return $model;
} else {
throw new NotFoundHttpException('The requested page does not exist.');
}
}
}
Second Controller TestRoleController.php
<?php
namespace app\controllers;
use Yii;
use app\models\TestRole;
use app\models\search\TestRoleSearch;
use yii\web\Controller;
use yii\web\NotFoundHttpException;
use yii\filters\VerbFilter;
/**
* TestRoleController implements the CRUD actions for TestRole model.
*/
class TestRoleController extends Controller
{
/**
* #inheritdoc
*/
public function behaviors()
{
return [
'verbs' => [
'class' => VerbFilter::className(),
'actions' => [
'delete' => ['POST'],
],
],
];
}
/**
* Lists all TestRole models.
* #return mixed
*/
public function actionIndex()
{
$searchModel = new TestRoleSearch();
$dataProvider = $searchModel->search(Yii::$app->request->queryParams);
return $this->render('index', [
'searchModel' => $searchModel,
'dataProvider' => $dataProvider,
]);
}
/**
* Displays a single TestRole model.
* #param integer $id
* #return mixed
*/
public function actionView($id)
{
return $this->render('view', [
'model' => $this->findModel($id),
]);
}
/**
* Creates a new TestRole model.
* If creation is successful, the browser will be redirected to the 'view' page.
* #return mixed
*/
public function actionCreate()
{
$model = new TestRole();
if ($model->load(Yii::$app->request->post()) && $model->save()) {
return $this->redirect(['view', 'id' => $model->id]);
} else {
return $this->render('create', [
'model' => $model,
]);
}
}
/**
* Updates an existing TestRole model.
* If update is successful, the browser will be redirected to the 'view' page.
* #param integer $id
* #return mixed
*/
public function actionUpdate($id)
{
$model = $this->findModel($id);
if ($model->load(Yii::$app->request->post()) && $model->save()) {
return $this->redirect(['view', 'id' => $model->id]);
} else {
return $this->render('update', [
'model' => $model,
]);
}
}
/**
* Deletes an existing TestRole model.
* If deletion is successful, the browser will be redirected to the 'index' page.
* #param integer $id
* #return mixed
*/
public function actionDelete($id)
{
$this->findModel($id)->delete();
return $this->redirect(['index']);
}
/**
* Finds the TestRole model based on its primary key value.
* If the model is not found, a 404 HTTP exception will be thrown.
* #param integer $id
* #return TestRole the loaded model
* #throws NotFoundHttpException if the model cannot be found
*/
protected function findModel($id)
{
if (($model = TestRole::findOne($id)) !== null) {
return $model;
} else {
throw new NotFoundHttpException('The requested page does not exist.');
}
}
}
Now what I want that i want to insert data into both tables. I want that at the time creating new user all the list of roles should display having checkbox infront of each role and vice-versa. Any help can help me a lot.
My view file is ->create.php
<?php
use yii\helpers\Html;
/* #var $this yii\web\View */
/* #var $model app\models\TestUser */
$this->title = 'Create Test User';
$this->params['breadcrumbs'][] = ['label' => 'Test Users', 'url' => ['index']];
$this->params['breadcrumbs'][] = $this->title;
?>
<div class="test-user-create">
<h1><?= Html::encode($this->title) ?></h1>
<?= $this->render('_form', [
'model' => $model,
]) ?>
</div>
And create action of TestUserController.php
public function actionCreate()
{
$user = new TestUser;
$role = new TestRole;
if($user->load(Yii::$app->request->post()) && $role->load(Yii::$app->request->post()) &&
$user->validate() && $role->validate())
{
$user->save(false);
$role->save(false);
$user->link('testRoles', $role); //add row in junction table
return $this->redirect(['index']);
}
return $this->render('create', compact('user', 'role'));
}

Answer 1

Add in TestRole model
public function getTestUsers(){
return $this->hasMany(TestUser::className(), ['id' => 'user_id'])
->viaTable(TestUserRole::tableName(), ['role_id' => 'id']);
}
Add in TestUser model
public function getTestRoles(){
return $this->hasMany(TestRole::className(), ['id' => 'role_id'])
->viaTable(TestUserRole::tableName(), ['user_id' => 'id']);
}
In controller, when save models
public function actionCreate(){
$user = new TestUser;
$role = new TestRole;
if($user->load(Yii::$app->request->post()) && $role->load(Yii::$app->request->post()) &&
$user->validate() && $role->validate()){
$user->save(false);
$role->save(false);
$user->link('testRoles', $role); //add row in junction table
return $this->redirect(['index']);
}
return $this->render('create', compact('user', 'role'));
}