ActiveRecord orqali foydalanish ¶

Avvalo Yii2'da ActiveRecord'dan qanday foydalanish haqida umumiy ma'lumot olish uchun qo'llanma ga qarang.

Redis'dan ActiveRecord orqali foydalanish uchun sizning sinfingiz yii\redis\ActiveRecord vorisi bo'lish va sinfingizda kamida attributes() metodi bo'lishi kerak.

PrimaryKey'ni [[yii\redis\ActiveRecord::primaryKey()]] orqali tanitish mumkin, agar berilmagan bo'lsa, id PrimaryKey sifatida tanitiladi. PrimaryKey'ni ko'rsatmagan bo'lsangiz, PrimaryKey sifatida id olinganligini tekshiring.

Quyida Customer nomli namunaviy model keltirilgan:

class Customer extends \yii\redis\ActiveRecord
{
    /**
     * @return array the list of attributes for this record
     */
    public function attributes()
    {
        return ['id', 'name', 'address', 'registration_date'];
    }

    /**
     * @return ActiveQuery defines a relation to the Order record (can be in other database, e.g. elasticsearch or sql)
     */
    public function getOrders()
    {
        return $this->hasMany(Order::className(), ['customer_id' => 'id']);
    }

    public static function find()
    {
        return new CustomerQuery(get_called_class());
    }
}

class CustomerQuery extends \yii\redis\ActiveQuery
{
    /**
     * Defines a scope that modifies the `$query` to return only active(status = 1) customers
     */
    public function active()
    {
        return $this->andWhere(['status' => 1]);
    }
}

Общее использование redis ActiveRecord очень похоже на БД ActiveRecord как описано в руководстве. Он поддерживает тот же интерфейс и функции, за исключением следующих ограничений:

Redis'dan ActiveRecord'da foydalanish, ma'lumotlar bazasi bilan ishlashga juda o'xshaydi. Faqat u quyidagi cheklovlardan tashqari bir xil interfeys va xususiyatlarni qo'llab-quvvatlaydi:

• Redis SQL'ni qo'llab-quvvatlamagani uchun quidagi metodlardan foydalanib bo'lmaydi where(), limit(), offset(), orderBy() va indexBy().
• via - jadval via orqali aniqlab (bog'lanib) bo'lmaydi, chunki redisda jadvallar mavjud emas. Siz bog'lanishlarni boshqa ma'lumotlar orqali belgilashingiz mumkin.

Redis ActiveRecords dan oddiy ActiveRecord sinflariga va aksincha bog'lanishlarni aniqlashingiz mumkin.

Masalan:

$customer = new Customer();
$customer->attributes = ['name' => 'test'];
$customer->save();
echo $customer->id; // id will automatically be incremented if not set explicitly

$customer = Customer::find()->where(['name' => 'test'])->one(); // find by query
$customer = Customer::find()->active()->all(); // find all by query (using the `active` scope)