我正在尝试使用AWS Lambda搜索非主键并将其集成到Alexa Skills Kit中。我是使用DynamoDB和Alexa Skills Kit的新手,我很难在网上找到任何解决方案。我正在尝试做的基本前提是查询表yesno有两列,id和message。只查看消息列以查找与我在params中指定的文本匹配。
以下是我正在使用的Lambda代码:
const AWSregion = 'eu-west-1';
const Alexa = require('alexa-sdk');
const AWS = require('aws-sdk');
//params for searching table
const params = {
TableName: 'yesno',
Key:{ "message": 'Ben Davies' }
};
AWS.config.update({
region: AWSregion
});
exports.handler = function(event, context, callback) {
var alexa = Alexa.handler(event, context);
// alexa.appId = 'amzn1.echo-sdk-ams.app.1234';
// alexa.dynamoDBTableName = 'YourTableName'; // creates new table for session.attributes
alexa.registerHandlers(handlers);
alexa.execute();
};
const handlers = {
'LaunchRequest': function () {
this.response.speak('welcome to magic answers. ask me a yes or no question.').listen('try again');
this.emit(':responseReady');
},
'MyIntent': function () {
var MyQuestion = this.event.request.intent.slots.MyQuestion.value;
console.log('MyQuestion : ' + MyQuestion);
readDynamoItem(params, myResult=>{
var say = MyQuestion;
say = myResult;
say = 'you asked, ' + MyQuestion + '. I found a reckord for: ' + myResult;
this.response.speak(say).listen('try again');
this.emit(':responseReady');
});
},
'AMAZON.HelpIntent': function () {
this.response.speak('ask me a yes or no question.').listen('try again');
this.emit(':responseReady');
},
'AMAZON.CancelIntent': function () {
this.response.speak('Goodbye!');
this.emit(':responseReady');
},
'AMAZON.StopIntent': function () {
this.response.speak('Goodbye!');
this.emit(':responseReady');
}
};
// END of Intent Handlers {} ========================================================================================
// Helper Function =================================================================================================
function readDynamoItem(params, callback) {
var AWS = require('aws-sdk');
AWS.config.update({region: AWSregion});
var dynamodb = new AWS.DynamoDB();
console.log('reading item from DynamoDB table');
dynamodb.query(params, function (err, data) {
if (err) console.log(err, err.stack); // an error occurred
else{
console.log(data); // successful response
callback(data.Item.message);
}
});
}
我知道我可能完全错了,但是没有太多的在线将DynamoDB与Alexa Skill集成,我唯一能找到的就是通过ID搜索。如果不将表中的所有项目都拉到地图或列表中,这对我想做的事情不起作用,并且看到我想要创建一个大数据库,它看起来效率很低。
在Alexa方面,我在测试代码时收到以下服务请求:
{
"session": {
"new": true,
"sessionId": "SessionId.f9558462-6db8-4bf5-84aa-22ee0920ae95",
"application": {
"applicationId": "amzn1.ask.skill.9f280bf7-d506-4d58-95e8-b9e93a66a420"
},
"attributes": {},
"user": {
"userId": "amzn1.ask.account.AF5IJBMLKNE32GEFQ5VFGVK2P4YQOLVUSA5YPY7RNEMDPKSVCBRCPWC3OBHXEXAHROBTT7FGIYA7HJW2PMEGXWHF6SQHRX3VA372OHPZZJ33K7S4K7D6V3PXYB6I72YFIQBHMJ4QGJW3NS3E2ZFY5YFSBOEFW6V2E75YAZMRQCU7MNYPJUMJSUISSUA2WF2RA3CIIDCSEY35TWI"
}
},
"request": {
"type": "IntentRequest",
"requestId": "EdwRequestId.7310073b-981a-41f8-9fa5-03d1b28c5aba",
"intent": {
"name": "MyIntent",
"slots": {
"MyQuestion": {
"name": "MyQuestion",
"value": "erere"
}
}
},
"locale": "en-US",
"timestamp": "2018-01-25T14:18:40Z"
},
"context": {
"AudioPlayer": {
"playerActivity": "IDLE"
},
"System": {
"application": {
"applicationId": "amzn1.ask.skill.9f280bf7-d506-4d58-95e8-b9e93a66a420"
},
"user": {
"userId": "amzn1.ask.account.AF5IJBMLKNE32GEFQ5VFGVK2P4YQOLVUSA5YPY7RNEMDPKSVCBRCPWC3OBHXEXAHROBTT7FGIYA7HJW2PMEGXWHF6SQHRX3VA372OHPZZJ33K7S4K7D6V3PXYB6I72YFIQBHMJ4QGJW3NS3E2ZFY5YFSBOEFW6V2E75YAZMRQCU7MNYPJUMJSUISSUA2WF2RA3CIIDCSEY35TWI"
},
"device": {
"supportedInterfaces": {}
}
}
},
"version": "1.0"
}
我收到的服务响应错误只是说“响应无效”
非常感谢任何帮助
答案 0 :(得分:4)
我想在dynamo db part中帮助你。
要访问dynamodb中的非主键列,您应执行扫描操作。
对于您的表格( yesno ),ID是主键,而消息是附加列。
访问非主键列的小部件[消息]
var dynamodb = new AWS.DynamoDB();
var params = {
TableName: 'yesno',
FilterExpression: 'message = :value',
ExpressionAttributeValues: {
':value': {"S": "Ben Davies"}
}
};
dynamodb.scan(params, function(err, data) {
if (err) // an error occurred
else console.log(data); // successful response
});
访问主键列的代码段[ID]
var docClient = new AWS.DynamoDB.DocumentClient();
//Get item by key
var params = {
TableName: 'sis_org_template',
Key: { "id": "1"}
};
docClient.get(params, function(err, data) {
if (err) // an error occurred
else console.log(data); // successful response
});