无法读取未定义的Alexa SDK的属性“ getMonetizationServiceClient”

Question

我正在尝试通过以下代码将“技能购买”添加到我的Alexa技能中：

const LaunchRequestHandler = {
    canHandle(handlerInput) {
        return handlerInput.requestEnvelope.request.type === "LaunchRequest";
    },
    handle(handlerInput){
        console.log("In LaunchRequest");

    const locale = handlerInput.requestEnvelope.request.locale;
    const ms = handlerInput.serviceClientFactory.getMonetizationServiceClient();

    return ms.getInSkillProducts(locale).then(function(result) {
      // Code to handle result.inSkillProducts goes here
       const totalProducts = result.inSkillProducts.length;
       const purchasableProducts = result.inSkillProducts.filter(record => record.purchasable == 'PURCHASABLE');
       const entitledProducts = result.inSkillProducts.filter(record => record.entitled == 'ENTITLED');

       return handlerInput.responseBuilder
        .speak('Found total ' + result.inSkillProducts.length + ' products of which ' + purchasableProducts.length + ' are purchasable and ' + entitledProducts.length + ' are entitled.')
        .getResponse();
    });
    },
};

运行代码时，出现以下错误消息：

Response:
{
  "errorMessage": "Cannot read property 'getMonetizationServiceClient' of undefined",
  "errorType": "TypeError",
  "stackTrace": [
    "Object.handle (/var/task/index.js:16:50)",
    "GenericHandlerAdapter.<anonymous> (/var/task/node_modules/ask-sdk-runtime/dist/dispatcher/request/handler/GenericHandlerAdapter.js:63:47)",
    "step (/var/task/node_modules/ask-sdk-runtime/dist/dispatcher/request/handler/GenericHandlerAdapter.js:44:23)",
    "Object.next (/var/task/node_modules/ask-sdk-runtime/dist/dispatcher/request/handler/GenericHandlerAdapter.js:25:53)",
    "/var/task/node_modules/ask-sdk-runtime/dist/dispatcher/request/handler/GenericHandlerAdapter.js:19:71",
    "new Promise (<anonymous>)",
    "__awaiter (/var/task/node_modules/ask-sdk-runtime/dist/dispatcher/request/handler/GenericHandlerAdapter.js:15:12)",
    "GenericHandlerAdapter.execute (/var/task/node_modules/ask-sdk-runtime/dist/dispatcher/request/handler/GenericHandlerAdapter.js:61:16)",
    "GenericRequestDispatcher.<anonymous> (/var/task/node_modules/ask-sdk-runtime/dist/dispatcher/GenericRequestDispatcher.js:173:58)",
    "step (/var/task/node_modules/ask-sdk-runtime/dist/dispatcher/GenericRequestDispatcher.js:44:23)"
  ]
}

我使用了Alexa SDK站点中的代码，可以在以下位置找到：https : //ask-sdk-for-nodejs.readthedocs.io/en/latest/Calling-Alexa-Service-APIs.html#getinskillproducts。有人可以告诉我哪里出了问题或如何解决？提前致谢。

Answer 1

如果您共享您的出口部分，我也许可以提供进一步的帮助。如果您正在使用带有以下代码的自定义alexa技能生成器：

const skillBuilder = Alexa.SkillBuilders.custom();
exports.handler = skillBuilder
.addRequestHandlers()

要么

exports.handler = Alexa.SkillBuilders.custom()
.addRequestHandlers()

那么您只需要添加 .withApiClient(new Alexa.DefaultApiClient())

例如，您的出口可能如下所示：

const skillBuilder = Alexa.SkillBuilders.custom();
exports.handler = skillBuilder
  .addRequestHandlers(
    CancelResponseHandler,
    LaunchRequestHandler,
    HelloWorldIntentHandler,
    HelpIntentHandler,
    CancelAndStopIntentHandler,
    SessionEndedRequestHandler
  )
  .addErrorHandlers(ErrorHandler)
  .withApiClient(new Alexa.DefaultApiClient())
  .lambda();`

我从以下问题中找到了该解决方案：https : //github.com/alexa/alexa-skills-kit-sdk-for-nodejs/issues/356