使用确认时的 Alexa 递归意图委托

Question

我正在编写一个带有意图确认的 Alexa 对话。当确认被拒绝时，我想通过委派这个对话框再次重新启动同一个对话框。我正在按照this 堆栈溢出问题中的描述进行操作。如该问题的解决方案中所述，当dialogState 仍为IN_PROGRESS 时，我进行委托。在我的情况下，Alexa 总是以不太有意义的消息进行响应请求的技能响应存在问题。应用程序日志中没有错误消息。

我的技能模型和lambda代码如下：

{
  "interactionModel": {
    "languageModel": {
      "invocationName": "hello",
      "intents": [
        {
          "name": "UserIntent",
          "slots": [
            {
              "name": "UserName",
              "type": "AMAZON.FirstName",
              "samples": [
                "My name is {UserName}",
                "I am {UserName}",
                "{UserName}"
              ]
            }
          ],
          "samples": [
            "My name is {UserName}",
            "I am {UserName}"
          ]
        }
      ],
      "types": []
    },
    "dialog": {
      "delegationStrategy": "SKILL_RESPONSE",      
      "intents": [
        {
          "name": "UserIntent",
          "confirmationRequired": true,
          "prompts": {
            "confirmation": "Confirm.Intent.UserName"
          },
          "slots": [
            {
              "name": "UserName",
              "type": "AMAZON.FirstName",
              "confirmationRequired": false,
              "elicitationRequired": true,
              "prompts": {
                "elicitation": "Elicit.Slot.UserName"
              }
            }
          ]
        }
      ]
    },
    "prompts": [
      {
        "id": "Elicit.Slot.UserName",
        "variations": [
          {
            "type": "PlainText",
            "value": "What is your name?"
          }
        ]
      },
      {
        "id": "Confirm.Intent.UserName",
        "variations": [
          {
            "type": "PlainText",
            "value": "You are {UserName}. Is this right?"
          }
        ]
      }
    ]
  }
}

const DeniedUserIntentHandler = {
  canHandle(handlerInput) {
    const request = handlerInput.requestEnvelope.request;
    return request.type === 'IntentRequest' &&
      request.intent.name === 'UserIntent' &&
      request.dialogState === 'IN_PROGRESS' &&
      request.intent.confirmationStatus === 'DENIED';
  },

  async handle(handlerInput) {
    const request = handlerInput.requestEnvelope.request;
    const currentIntent = request.intent;
    const userName = Alexa.getSlotValue(handlerInput.requestEnvelope, 'UserName');

    console.log(`DeniedUserIntentHandler: 
    request.dialogState=${request.dialogState}, request.intent.confirmationStatus=${request.intent.confirmationStatus}, userName=${userName}`);

    return handlerInput.responseBuilder
      .speak('Username was not confirmed. Please try again.')
      .addDelegateDirective({
        name: 'UserIntent',
        confirmationStatus: 'NONE',
        slots: {}
      })
      .getResponse();
  }
};

我错过了什么？

Answer 1

您没有指定DeniedUserIntentHandler 是否被触发。如果错误是在DeniedUserIntentHandler 内部产生的，那么这是由于Delegate Directive 的格式错误。

你的回复应该是这样的：

return handlerInput.responseBuilder
  .speak('Username was not confirmed. Please try again.')
  .addDelegateDirective({
                         "type": "Dialog.Delegate",
                         "updatedIntent": {
                               name:"UserIntent",
                               confirmationStatus:"NONE",
                               slots: {
                                 UserName: {
                                 name:"UserName",
                                 confirmationStatus:"NONE",
                                 source:"USER"
                                 }
                               }
                            }
                         })
                         .getResponse();

您删除意图的先前状态的原因是您希望意图操作从头开始。

你也可以像这样使用你的代码：参考https://forums.developer.amazon.com/questions/92334/answering-no-to-intent-confirmation.html?childToView=206243#comment-206243

currentIntent.confirmationStatus = "NONE";
Object.keys(currentIntent.slots).forEach(
    (slotName) => {
      var slot = intent.slots[slotName];
      delete slot.value;
      slot.confirmationStatus = "NONE";
    }
);

var delegatedirective = {"type": "Dialog.Delegate",
                         "updatedIntent": currentIntent};

Answer 2

您现在面临的问题是真正的问题。亚马逊forum 也提到了这个问题。 但是，您可以通过稍作修改来实现类似的行为。 激活槽值确认 UserName 和 删除确认 UserIntent。 您的交互模型如下所示：

{
"interactionModel": {
    "languageModel": {
        "invocationName": "demo app",
        "intents": [
            {
                "name": "UserIntent",
                "slots": [
                    {
                        "name": "UserName",
                        "type": "AMAZON.FirstName",
                        "samples": [
                            "My name is {UserName}",
                            "I am {UserName}",
                            "{UserName}"
                        ]
                    }
                ],
                "samples": [
                    "My name is {UserName}",
                    "I am {UserName}"
                ]
            },
            {
                "name": "AMAZON.NavigateHomeIntent",
                "samples": []
            }
        ],
        "types": []
    },
    "dialog": {
        "intents": [
            {
                "name": "UserIntent",
                "delegationStrategy": "SKILL_RESPONSE",
                "confirmationRequired": false,
                "prompts": {},
                "slots": [
                    {
                        "name": "UserName",
                        "type": "AMAZON.FirstName",
                        "confirmationRequired": true,
                        "elicitationRequired": true,
                        "prompts": {
                            "confirmation": "Confirm.Slot.247378890994.1277345498514",
                            "elicitation": "Elicit.Slot.UserName"
                        }
                    }
                ]
            }
        ],
        "delegationStrategy": "ALWAYS"
    },
    "prompts": [
        {
            "id": "Elicit.Slot.UserName",
            "variations": [
                {
                    "type": "PlainText",
                    "value": "What is your name?"
                }
            ]
        },
        {
            "id": "Confirm.Slot.247378890994.1277345498514",
            "variations": [
                {
                    "type": "PlainText",
                    "value": "your name is {UserName} , right ?"
                }
            ]
        }
    ]
  }
}

您可以添加这个单一的代码处理程序：

const UserIntenStartedHandler = {
  canHandle(handlerInput) {
    const request = handlerInput.requestEnvelope.request;
    return request.type === 'IntentRequest' &&
    request.intent.name === 'UserIntent';
  },
  async handle(handlerInput) {
    const request = handlerInput.requestEnvelope.request;
    const currentIntent = Alexa.getIntentName(handlerInput.requestEnvelope);
    const slot = Alexa.getSlot(handlerInput.requestEnvelope, 'UserName');

    if (slot.confirmationStatus !== 'CONFIRMED') {
      return handlerInput.responseBuilder
     .addDelegateDirective(request.intent) 
     .getResponse();
    } else {
      return handlerInput.responseBuilder
     .speak('your Final name is ' + slot.value + '. cheers')
     .withShouldEndSession(true)
     .getResponse();
    }
  }  
};

Answer 3

感谢@tahiat 的回复，我能够找出我原来的问题。在更新的意图中，槽对象必须包含意图的槽（没有值）。但是他的第一个代码 sn-p 包含一个错误。以太币使用

.addDirective({
  "type": "Dialog.Delegate", 
  "updatedIntent": { 
     name:"UserIntent", 
     ...
  }
})

或使用

.addDelegateDirective({
  name:"UserIntent", 
  ...
})

因为addDelegateDirective 需要一个意图作为参数。

但现在我面临另一个问题。我在对话框中使用确认。当我在确认被拒绝后回到UserIntent 的初始状态时，我从来没有收到确认消息的提示。这是因为request.intent.confirmationStatus 保留了它的值，即'DENIED'，尽管我已将updateIntent 中的它重置为'NONE'。