PHP code example of nyx-solutions / yii2-nyx-ar-many-to-many-link

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

nyx-solutions / yii2-nyx-ar-many-to-many-link example snippets

class Item extends ActiveRecord
{
    public function behaviors()
    {
        return [
            'linkGroupBehavior' => [
                'class' => LinkManyToManyBehavior::className(),
                'relation' => 'groups', // relation, which will be handled
                'relationReferenceAttribute' => 'groupIds', // virtual attribute, which is used for related records specification
            ],
        ];
    }

    public static function tableName()
    {
        return 'Item';
    }

    public function getGroups()
    {
        return $this->hasMany(Group::className(), ['id' => 'groupId'])->viaTable('ItemGroup', ['itemId' => 'id']);
    }
}

// Pick up related model primary keys:
$groupIds = Group::find()
    ->select('id')
    ->where(['isActive' => true])
    ->column();

$item = new Item();
$item->groupIds = $groupIds; // setup related models references
$item->save(); // after main model is saved referred related models are linked

$groups = Group::find()
    ->where(['isActive' => true])
    ->all();

$item = new Item();
$item->save();

foreach ($groups as $group) {
    $item->link('groups', $group);
}

$item = Item::findOne(15);
var_dump($item->groupIds); // outputs something like: array(2, 5, 11)

$item = Item::findOne(15);
$item->groupIds = array_merge($item->groupIds, [17, 21]);
$item->save(); // groups "17" and "21" will be added

$item->groupIds = [5];
$item->save(); // all groups except "5" will be removed

class Item extends ActiveRecord
{
    public function rules()
    {
        return [
            ['groupIds', 'safe'] // ensure 'groupIds' value can be collected on `populate()`
            // ...
        ];
    }

    // ...
}

use yii\helpers\ArrayHelper;
use yii\helpers\Html;
use yii\widgets\ActiveForm;

/* @var $model Item */

use yii\web\Controller;

class ItemController extends Controller
{
    public function actionCreate()
    {
        $model = new Item();

        if ($model->load(Yii::$app->request->post()) && $model->save()) {
            return $this->redirect(['view']);
        }

        return $this->render('create', ['model' => $model]);
    }

    // ...
}