Alexa技能套件，无法使会话属性持久化 [英] Alexa skills kit, trouble getting session attributes to persist

问题描述

我一直在研究一项技能，该技能正在使用通过亚马逊帐户登录链接，因此我可以获取要在我的技能中使用的用户电子邮件地址和名称。我正在执行类似于scoreKeeper示例的操作，使用eventHandlers.js和storage.js将项目保存到数据库。在eventHandlers.onLaunch中，我成功地从亚马逊获取了个人资料名称和电子邮件地址，并将其保存到session.attribute中，如下所示：

I have been working on a skill where I am using Login With Amazon account linking so I can grab the user email address and name to use in my skill. I am doing something similar to the scoreKeeper sample, using the eventHandlers.js and the storage.js for saving items to a database. In the eventHandlers.onLaunch I am successfully getting the profile name and email address from Amazon and I save it to the session.attributes like this:

      var profile = JSON.parse(body);
                speechOutput="Hello, " + profile.name.split(" ")[0] + ".";
                var sessionAttributes = {};
                sessionAttributes = { name: profile.name, email: profile.email };
                session.attributes = sessionAttributes;
                console.log("Name in session:", session.attributes.name);

控制台日志显示该名称，因此我知道它已保存在session.attributes中，但是当我尝试访问storage.js或intentHandlers.js中的session.attributes，它显示为空。我想念什么？提前致谢。

The console log shows the name so I know it is being saved in the session.attributes, but when I try to access the session.attributes in my storage.js or intentHandlers.js, it shows it as being empty. What am I missing? Thanks in advance. This has been driving me crazy.

推荐答案

假设您要从用户获取城市名称并能够访问该值稍后在Alexa会话中：

Let's say you want to obtain city name from the user and be able to access that value later in the Alexa session:

1）在JSON响应中预定义键/值对：

1) Pre-define your key/value pairs in the JSON response:

def build_response(session_attributes, speechlet_response):
return {
    'version': '1.0',
    'sessionAttributes': {
        "session_attributes": {
            'NameOfCity': city_name,
        }
},
    'response': speechlet_response
}

2）在全局范围内，将变量声明为空字符串：

2) In global scope, declare the variable as an empty string:

city_name = "",

3）每当您在函数中更新该变量时，请确保将该变量引用为全局变量。例如：

3) Whenever you update that variable within a function, make sure you reference that variable as global. For example:

def set_city_name_in_session(intent, session):

card_title = intent['name']
session_attributes = {}
should_end_session = False

if 'CityIntent' in intent['slots']:
    global city_name
    city_name = intent['slots']['CityIntent']['value']

4）创建函数时需要访问此变量，将全局变量作为参数传递给函数，然后在函数内公开所有会话密钥/对值，如下所示：

4) When creating a function that needs to access this variable, pass the global variable as an argument into the function then, within the function, expose all session key/pair values like so:

def access_variables(intent, session, city_name):

card_title = intent['name']
session_attributes = {}
should_end_session = False
exposed_attributes = session['attributes']['session_attributes']
city_name_attribute_value = exposed_attributes.get('NameOfCity')

if (some_kind_of_condition):
    do something awesome with city_name_attribute_value

T o测试，将样本话语输入到Service Simulator中，然后检查Lambda JSON响应中的值是否持久。

To test, enter sample utterances into Service Simulator then check if values are persisting in your Lambda JSON response.

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