test for deeply nested relation

tests/unit/data/ar/Customer.php

 <?php
 namespace yiiunit\data\ar;
 
+use yii\db\ActiveQuery;
 use yiiunit\framework\db\ActiveRecordTest;
 
 /**
@@ -34,6 +35,17 @@ class Customer extends ActiveRecord
 		return $this->hasMany(Order::className(), ['customer_id' => 'id'])->inverseOf('customer2')->orderBy('id');
 	}
 
+	// deeply nested table relation
+	public function getOrderItems()
+	{
+		/** @var ActiveQuery $rel */
+		$rel = $this->hasMany(Item::className(), ['id' => 'item_id']);
+		return $rel->viaTable('tbl_order_item', ['order_id' => 'id'], function($q) {
+			/** @var ActiveQuery $q */
+			$q->viaTable('tbl_order', ['customer_id' => 'id']);
+		})->orderBy('id');
+	}
+
 	public function afterSave($insert)
 	{
 		ActiveRecordTest::$afterSaveInsert = $insert;

tests/unit/framework/db/ActiveRecordTest.php

@@ -131,6 +131,22 @@ class ActiveRecordTest extends DatabaseTestCase
 		$this->assertEquals(2, $order['books'][1]['id']);
 	}
 
+	// deeply nested table relation
+	public function testDeeplyNestedTableRelation()
+	{
+		/** @var Customer $customer */
+		$customer = $this->callCustomerFind(1);
+		$this->assertNotNull($customer);
+
+		$items = $customer->orderItems;
+
+		$this->assertEquals(2, count($items));
+		$this->assertInstanceOf(Item::className(), $items[0]);
+		$this->assertInstanceOf(Item::className(), $items[1]);
+		$this->assertEquals(1, $items[0]->id);
+		$this->assertEquals(2, $items[1]->id);
+	}
+
 	public function testStoreNull()
 	{
 		$record = new NullValues();