Working with relational removals by yii2

This tutorial shows you how to safely remove records between relationships.

First we create three tables using a Many to Many relationship.

Imagem da relacao

Important: Apply cascade to foreign key constraints for update and delete.

The cascade feature will allow you to remove the foreign keys along with the line you want to delete and helps keep your code to a minimum.

Script SQL the ralation has.

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:

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:

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:

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

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();
    }

  }
     // deletando de vinculo
     public function actionDeleteTestAll()
     {
       $game = Games::findOne(1);
       foreach($game->tests as $test)
       {
          $test->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();
    }

  }

Get All code in Your text to link here...

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Viewed: 15 781 times
Version: 2.0
Category: Tutorials
Written by: AndroideLP
Last updated by: Jairus Martin
Created on: Dec 23, 2016
Last updated: a year ago
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