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Yii2 behaviors implement handling of mongodb embedded documents

• Add attribute with name starting with underscore to model.

  
  /**

• @inheritdoc */ public function attributes() { return [ '_address', '_phones', ] }

• Add "safe" validation rule for attribute without underscore in name.

  /**
  * @inheritdoc
  */
  public function rules()
  {
  return [
          [['address', 'phones'], 'safe'],
      ]
  }

• Add behavior with attribute name with underscore in name

  'address' => [
  'class' => EmbedsOneBehavior::className(),
  'attribute' => '_address',
  'embedded' => Address::className()
  ],
  'phones' => [
  'class' => EmbedsManyBehavior::className(),
  'attribute' => '_phones',
  'embedded' => Phone::className()
  ],

• Your embedded documents must be inherited from EmbeddedDocument class.

  class Phone extends EmbeddedDocument 
  {
  public $number;
  public $type;
  
  public function rules()
  {
      return [
          [['number', 'type'], 'string'],
          [['type'], 'in', 'range' => ['home', 'work']],
      ];
  }
  }

• To create empty embedded document set base document's scenario to the value listed in initEmptyScenarios parameter of EmbedsManyBehavior

  'address' => [
  'class' => EmbedsOneBehavior::className(),
  'attribute' => '_address',
  'initEmptyScenarios' => ['create', 'update'],
  'embedded' => Address::className()
  ],

• Use attribute without underscore in form or view

  
  // Address
  echo $form->field($company->address, 'detail');
  echo $form->field($company->address, 'id')->hiddenInput();

// Phones foreach($company->phones as $key => $phone) { echo $form->field($phone, 'number'); echo $form->field($phone, 'type'); }