Criei um tutorial para o Yii2

yii-trabalhando-com-remocoes-relacionais/README.md

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+# Tutoriais
+
+### Working with relational removals by yii2
+
+This tutorial shows you how to safely and safely remove relationships between relationships and multiple lines.
+
+First we create three tables using a Many to Many relationship.
+![](relacao-exemplo.jpg)
+
+** Important: Apply cascate to foreign key, update and Delete. **
+
+This feature will allow you to remove the foreign keys along with the line you want to delete. This is very useful not to pollute your code.
+
+Script Sql the ralation has.
+
+```Sql
+CREATE TABLE `tests_has_games` (
+   `tests_id` int(11) NOT NULL,
+   `games_id` int(11) NOT NULL,
+   PRIMARY KEY (`tests_id`,`games_id`),
+   KEY `fk_tests_has_games_games1_idx` (`games_id`),
+   KEY `fk_tests_has_games_tests_idx` (`tests_id`),
+   CONSTRAINT `fk_tests_has_games_games1` FOREIGN KEY (`games_id`) REFERENCES `games` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
+   CONSTRAINT `fk_tests_has_games_tests` FOREIGN KEY (`tests_id`) REFERENCES `tests` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
+ ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin
+
+```
+
+* Step 2: Create models: (to use generator gii, this system create model with relations of the table).
+
+** ModelGames: **
+
+```php
+public function getTestsHasGames()
+    {
+        return $this->hasMany(TestsHasGames::className(), ['games_id' => 'id']);
+    }
+
+    /**
+     * @return \yii\db\ActiveQuery
+     */
+    public function getTests()
+    {
+        return $this->hasMany(Tests::className(), ['id' => 'tests_id'])->viaTable('{{%tests_has_games}}', ['games_id' => 'id']);
+    }
+
+```
+
+** Model Tests: **
+
+```php
+public function getTestsHasGames()
+    {
+        return $this->hasMany(TestsHasGames::className(), ['tests_id' => 'id']);
+    }
+
+    /**
+     * @return \yii\db\ActiveQuery
+     */
+    public function getGames()
+    {
+        return $this->hasMany(Games::className(), ['id' => 'games_id'])->viaTable('{{%tests_has_games}}', ['tests_id' => 'id']);
+    }
+
+````
+
+* Step 3: Simple Removal Functions in controllers:
+
+```php
+public function actionDeletarTest($id)
+  {
+
+    $session = \Yii::$app->session;
+
+    $testes = Tests::findOne($id);
+
+    if($testes->delete())
+    {
+      $session->addFlash('resposta', [
+        'type'=>'success',
+        'msg'=>'Teste deletado com sucesso.'
+      ]);
+    }else{
+      $session->addFlash('resposta', [
+        'type'=>'danger',
+        'msg'=>'Erro encontrado favor resolver.'
+      ]);
+    }
+
+    return $this->redirect(['site/delete-relations']);
+
+  }
+
+```
+
+* Other Methods
+
+```php
+
+
+public function actionDeleteListGames()
+  {
+    $array_id = [1,2,3,4];
+
+    $games = Games::find()->where(['in','id',$array_id])->all();
+
+    foreach($games as $k => $game)
+    {
+      $game->delete();
+    }
+
+  }
+
+
+public function actionDeleteTheRelation($id)
+  {
+
+
+    $game = Games::find()->joinWith(['tests'=>function($q){
+      return $q->where(['like','nome','proccess'])
+    }])->where(['id'=>$id])->one();
+
+    foreach($games->tests as $k => $test)
+    {
+      $test->delete();
+    }
+
+  }
+
+```
+
+** All code in this post **
+
+@author André Luiz Pereira
+Link: https://www.facebook.com/androidemastercode/

yii-trabalhando-com-remocoes-relacionais/code/controllers/SiteController.php

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+<?php
+
+namespace app\controllers;
+
+use Yii;
+use yii\filters\AccessControl;
+use yii\web\Controller;
+use yii\filters\VerbFilter;
+use app\models\LoginForm;
+use app\models\ContactForm;
+use app\models\Tests;
+use app\models\Games;
+
+class SiteController extends Controller
+{
+
+
+
+  public function actionDeleteRelations()
+  {
+
+    $testes = Tests::search();
+    $games = Games::search();
+
+      return $this->render('delete',[
+        'testes'=>$testes,
+        'games'=>$games,
+      ]);
+  }
+
+  public function actionDeletarTest($id)
+  {
+
+    $session = \Yii::$app->session;
+
+    $testes = Tests::findOne($id);
+
+    if($testes->delete())
+    {
+      $session->addFlash('resposta', [
+        'type'=>'success',
+        'msg'=>'Teste deletado com sucesso.'
+      ]);
+    }else{
+      $session->addFlash('resposta', [
+        'type'=>'danger',
+        'msg'=>'Erro encontrado favor resolver.'
+      ]);
+    }
+
+    return $this->redirect(['site/delete-relations']);
+
+  }
+
+  public function actionDeletarGame($id)
+  {
+
+    $games = Games::findOne($id);
+    $session = \Yii::$app->session;
+
+    if($games->delete())
+    {
+      $session->addFlash('resposta', [
+        'type'=>'success',
+        'msg'=>'Tabela deletada com sucesso!'
+      ]);
+    }else{
+      $session->addFlash('resposta', [
+        'type'=>'danger',
+        'msg'=>'Ocorreu um erro no processo de remoção'
+      ]);
+    }
+
+    return $this->redirect(['site/delete-relations']);
+  }
+
+  public function actionDeleteListGames()
+  {
+    $array_id = [1,2,3,4];
+
+    $games = Games::find()->where(['in','id',$array_id])->all();
+
+    foreach($games as $k => $game)
+    {
+      $game->delete();
+    }
+
+  }
+
+  public function actionDeleteTheRelation($id)
+  {
+
+
+    $game = Games::find()->joinWith(['tests'=>function($q){
+      return $q->where(['like','nome','proccess'])
+    }])->where(['id'=>$id])->one();
+
+    foreach($games->tests as $k => $test)
+    {
+      $test->delete();
+    }
+
+  }
+
+
+
+
+
+    /**
+     * @inheritdoc
+     */
+    public function behaviors()
+    {
+        return [
+            'access' => [
+                'class' => AccessControl::className(),
+                'only' => ['logout'],
+                'rules' => [
+                    [
+                        'actions' => ['logout'],
+                        'allow' => true,
+                        'roles' => ['@'],
+                    ],
+                ],
+            ],
+            'verbs' => [
+                'class' => VerbFilter::className(),
+                'actions' => [
+                    'logout' => ['post'],
+                ],
+            ],
+        ];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function actions()
+    {
+        return [
+            'error' => [
+                'class' => 'yii\web\ErrorAction',
+            ],
+            'captcha' => [
+                'class' => 'yii\captcha\CaptchaAction',
+                'fixedVerifyCode' => YII_ENV_TEST ? 'testme' : null,
+            ],
+        ];
+    }
+
+    /**
+     * Displays homepage.
+     *
+     * @return string
+     */
+    public function actionIndex()
+    {
+        return $this->render('index');
+    }
+
+    /**
+     * Login action.
+     *
+     * @return string
+     */
+    public function actionLogin()
+    {
+        if (!Yii::$app->user->isGuest) {
+            return $this->goHome();
+        }
+
+        $model = new LoginForm();
+        if ($model->load(Yii::$app->request->post()) && $model->login()) {
+            return $this->goBack();
+        }
+        return $this->render('login', [
+            'model' => $model,
+        ]);
+    }
+
+    /**
+     * Logout action.
+     *
+     * @return string
+     */
+    public function actionLogout()
+    {
+        Yii::$app->user->logout();
+
+        return $this->goHome();
+    }
+
+    /**
+     * Displays contact page.
+     *
+     * @return string
+     */
+    public function actionContact()
+    {
+        $model = new ContactForm();
+        if ($model->load(Yii::$app->request->post()) && $model->contact(Yii::$app->params['adminEmail'])) {
+            Yii::$app->session->setFlash('contactFormSubmitted');
+
+            return $this->refresh();
+        }
+        return $this->render('contact', [
+            'model' => $model,
+        ]);
+    }
+
+
+}