Mongo Active Relation unit test fixed.

tests/unit/data/ar/mongo/Customer.php

@@ -27,6 +27,6 @@ class Customer extends ActiveRecord
 
 	public function getOrders()
 	{
-		return $this->hasMany(CustomerOrder::className(), ['customer_id' => 'id']);
+		return $this->hasMany(CustomerOrder::className(), ['customer_id' => '_id']);
 	}
 }

tests/unit/data/ar/mongo/CustomerOrder.php

@@ -22,6 +22,6 @@ class CustomerOrder extends ActiveRecord
 
 	public function getCustomer()
 	{
-		return $this->hasOne(Customer::className(), ['id' => 'customer_id']);
+		return $this->hasOne(Customer::className(), ['_id' => 'customer_id']);
 	}
 }