yii\db\BaseActiveRecord::hasOne PHP Method

BaseActiveRecord Class Documentation Usage Examples Of yii\db\BaseActiveRecord::hasOne Show file Open project: yiisoft/yii2

hasOne() public method

The declaration is returned in terms of a relational ActiveQuery instance through which the related record can be queried and retrieved back. A has-one relation means that there is at most one related record matching the criteria set by this relation, e.g., a customer has one country. For example, to declare the country relation for Customer class, we can write the following code in the Customer class: php public function getCountry() { return $this->hasOne(Country::className(), ['id' => 'country_id']); } Note that in the above, the 'id' key in the $link parameter refers to an attribute name in the related class Country, while the 'country_id' value refers to an attribute name in the current AR class. Call methods declared in ActiveQuery to further customize the relation.

public hasOne ( string $class, array $link ) : yii\db\ActiveQueryInterface
$class	string	the class name of the related record
$link	array	the primary-foreign key constraint. The keys of the array refer to the attributes of the record associated with the `$class` model, while the values of the array refer to the corresponding attributes in this AR class.
return	yii\db\ActiveQueryInterface	the relational query object.

    public function hasOne($class, $link)
    {
        /* @var $class ActiveRecordInterface */
        /* @var $query ActiveQuery */
        $query = $class::find();
        $query->primaryModel = $this;
        $query->link = $link;
        $query->multiple = false;
        return $query;
    }

Usage Example

Example #1

Show file

File: ActiveRecord.php Project: bscheshirwork/yii2-hiart

 /**
  * {@inheritdoc}
  * @return ActiveQuery the relational query object.
  */
 public function hasOne($class, $link)
 {
     return parent::hasOne($class, $link);
 }

BaseActiveRecord

__get

__isset

__set

__unset

afterDelete

afterFind

afterRefresh

afterSave

beforeDelete

beforeSave

bindModels