Kesalahan API REST Magento2 'Kelas tidak ada'

Saya telah membuat tes layanan web Magento 2.0.2 REST berdasarkan blog Alan: http://alankent.me/2015/07/24/creating-a-new-rest-web-service-in-magento-2/

Saya menggunakan tukang pos untuk memanggil layanan web kustom dan mendapatkan kesalahan berikut:

"message": "Class  does not exist",
  "code": -1,
  "trace": "#0 P:\\wwwroot\\Magento202_com_loc\\Web\\vendor\\magento\\framework\\Webapi\\ServiceInputProcessor.php(128): ReflectionClass->__construct('')\n#1 P:\\wwwroot\\Magento202_com_loc\\Web\\vendor\\magento\\framework\\Webapi\\ServiceInputProcessor.php(262): Magento\\Framework\\Webapi\\ServiceInputProcessor->_createFromArray(NULL, '30')\n#2 P:\\wwwroot\\Magento202_com_loc\\Web\\vendor\\magento\\framework\\Webapi\\ServiceInputProcessor.php(99): Magento\\Framework\\Webapi\\ServiceInputProcessor->convertValue('30', NULL)\n#3 P:\\wwwroot\\Magento202_com_loc\\Web\\vendor\\magento\\module-webapi\\Controller\\Rest.php(262): Magento\\Framework\\Webapi\\ServiceInputProcessor->process('Test\\\\Calculator...', 'add', Array)\n#4 P:\\wwwroot\\Magento202_com_loc\\Web\\vendor\\magento\\module-webapi\\Controller\\Rest.php(160): Magento\\Webapi\\Controller\\Rest->processApiRequest()\n#5 P:\\wwwroot\\Magento202_com_loc\\Web\\var\\generation\\Magento\\Webapi\\Controller\\Rest\\Interceptor.php(24): Magento\\Webapi\\Controller\\Rest->dispatch(Object(Magento\\Framework\\App\\Request\\Http))\n#6 P:\\wwwroot\\Magento202_com_loc\\Web\\vendor\\magento\\framework\\App\\Http.php(115): Magento\\Webapi\\Controller\\Rest\\Interceptor->dispatch(Object(Magento\\Framework\\App\\Request\\Http))\n#7 P:\\wwwroot\\Magento202_com_loc\\Web\\vendor\\magento\\framework\\App\\Bootstrap.php(258): Magento\\Framework\\App\\Http->launch()\n#8 P:\\wwwroot\\Magento202_com_loc\\Web\\index.php(39): Magento\\Framework\\App\\Bootstrap->run(Object(Magento\\Framework\\App\\Http))\n#9 {main}"

Saya dapat berhasil memanggil layanan web REST Magento di luar kotak.

app / code / Test / Calculator / registration.php

<?php

\Magento\Framework\Component\ComponentRegistrar::register(
\Magento\Framework\Component\ComponentRegistrar::MODULE,
'Test_Calculator',
__DIR__
);

app / code / Test / Calculator / etc / module.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
    <module name="Test_Calculator" setup_version="1.0.0"/>
</config>

app / code / Test / Calculator / etc / webapi.xml

<?xml version="1.0"?>
<routes xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Webapi:etc/webapi.xsd">

    <route url="/V1/calculator/add/:num1/:num2" method="GET">
        <service class="Test\Calculator\Api\CalculatorInterface" method="add"/>
        <resources>
            <resource ref="anonymous"/>
        </resources>
    </route>
</routes>

app / code / Test / Calculator / etc / di.xml

<?xml version="1.0"?>

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <preference for="Test\Calculator\Api\CalculatorInterface" type="Test\Calculator\Model\Calculator" />
</config>

app / code / Test / Calculator / Api / CalculatorInterface.php

<?php

namespace Test\Calculator\Api;

interface CalculatorInterface
{
    public function add($num1, $num2);
}

app / code / Test / Calculator / Model / Calculator.php

<?php

namespace Test\Calculator\Model;

use Test\Calculator\Api\CalculatorInterface;

class Calculator implements CalculatorInterface
{
    public function add($num1, $num2) {
        return $num1 + $num2;
    }
}

REST url yang mengembalikan kesalahan:

http://local.magento202.com:81/index.php/rest/V1/calculator/add/30/70

DocBlock diperlukan di aplikasi / kode / Tes / Kalkulator / Api / CalculatorInterface.php seperti yang dijelaskan di sini: http://devdocs.magento.com/guides/v2.0/coding-standards/docblock-standard-general.html

<?php

namespace Test\Calculator\Api;

interface CalculatorInterface
{
    /**
     * Add two numbers.
     *
     * @param int $num1
     * @param int $num2
     * @return int
     */
    public function add($num1, $num2);
}

Dalam masalah kasus saya adalah bahwa saya menggunakan klausul "gunakan" dalam antarmuka. Magento DocBlockReflection tidak bisa mengatasinya dan sedang mencari antarmuka tanpa namespace lengkap. Jadi misalnya dalam kode di bawah ini:

use My\Namespace\ExampleObjectInterface
interface ExampleObjectRepositoryInterface
{
/**
 * xyz
 * @param int $id
 * @return ExampleObjectInterface
 * @throws \Magento\Framework\Exception\NoSuchEntityException
 * @throws \Magento\Framework\Exception\LocalizedException
 */
public function getById($id);
}

Saya perlu menghapus klausul "gunakan":

interface ExampleObjectRepositoryInterface
{
/**
 * xyz
 * @param int $id
 * @return \My\Namespace\ExampleObjectInterface
 * @throws \Magento\Framework\Exception\NoSuchEntityException
 * @throws \Magento\Framework\Exception\LocalizedException
 */
public function getById($id);
}

Pastikan perintah di bawah ini berhasil dijalankan. Jangan menyela atau menekan panggilan API apa pun. Setelah eksekusi, masalah Anda akan teratasi. Bekerja untukku.

php bin/magento setup:di:compile