public function testFindScalar() { parent::testFindScalar(); // query scalar $val = Product::find()->where(['id' => 1])->select(['(!children.str!)'])->scalar(); $this->assertEquals('value1', $val); $val = Product::find()->where(['id' => 1])->select(['(!children.bool!)'])->scalar(); $this->assertEquals(1, $val); $val = Product::find()->where(['id' => 1])->select(['(!children.null!)'])->scalar(); $this->assertNull($val); }