How to get a specific item from DynamoDB table using NodeJs for alexa skill developmentIs there a way to get version from package.json in nodejs code?developing and testing alexa skill (with authorization)Alexa-Skill Monetization possibilities for developersStarting Alexa Skill in a specific stateAlexa Node.js skill not getting into intentRead from DynamoDB with Lambda nodejs for Alexa SkillScanning DynamoDB table not showing results from the column specified in ProjectionExpressionadding alexa skill session attributes from nodejsalexa skill local could not write to dynamodb

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How to get a specific item from DynamoDB table using NodeJs for alexa skill development


Is there a way to get version from package.json in nodejs code?developing and testing alexa skill (with authorization)Alexa-Skill Monetization possibilities for developersStarting Alexa Skill in a specific stateAlexa Node.js skill not getting into intentRead from DynamoDB with Lambda nodejs for Alexa SkillScanning DynamoDB table not showing results from the column specified in ProjectionExpressionadding alexa skill session attributes from nodejsalexa skill local could not write to dynamodb






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0















I've been trying to develop a skill in Alexa that can store data in amazon DynamoDB Table. For now i'm able to add data (i.e. an item name) along with an attribute (i.e. item location) into the DynamoDB table using voice commands, i'm also able to remove a specific item from the table. But now I want alexa to get a specific item along with its attribute (location) from the Table whenever i say Alexa get itemName.



I have created two separate files index.js to handle with the intent requests and DbHelper.js to pass the parameters to the table. I've included the code in both the files below.
i am using AWS Lambda function to host my skill's endpoint and using NodeJs to code the lambda function.



I've tried using different query options included in aws-sdk like docClient.get, docClient.scan and docClient.query, but since i'm new to this all i was able to do is to get all the items from the table not a specific item.



I expect to get a specific item from the table but i get all the items that are present in the table.






/* ```````````````Index.js```````````````*/

const Alexa = require('ask-sdk');
const dbHelper = require('./helpers/dbHelper');
const GENERAL_REPROMPT = "What would you like to do?";
const dynamoDBTableName = "FORGETABLE_THINGS";
const LaunchRequestHandler =
canHandle(handlerInput)
return handlerInput.requestEnvelope.request.type === 'LaunchRequest';
,
handle(handlerInput)
const speechText = 'Hello there. What is your favourite thing? You can say add itemname to add your item or say get to get your items.';
const repromptText = 'What would you like to do? You can say HELP to get available options';

return handlerInput.responseBuilder
.speak(speechText)
.reprompt(repromptText)
.getResponse();
,
;

const InProgressAddItemIntentHandler =
canHandle(handlerInput)
const request = handlerInput.requestEnvelope.request;
return request.type === 'IntentRequest' &&
request.intent.name === 'AddItemIntent' &&
request.dialogState !== 'COMPLETED';
,
handle(handlerInput)
const currentIntent = handlerInput.requestEnvelope.request.intent;
return handlerInput.responseBuilder
.addDelegateDirective(currentIntent)
.getResponse();



const AddItemIntentHandler =
canHandle(handlerInput)
return handlerInput.requestEnvelope.request.type === 'IntentRequest'
&& handlerInput.requestEnvelope.request.intent.name === 'AddItemIntent';
,
async handle(handlerInput)
const responseBuilder = handlerInput;
const userID = handlerInput.requestEnvelope.context.System.user.userId;
const slots = handlerInput.requestEnvelope.request.intent.slots;
const itemValue = slots.itemValue.value;
const location = slots.location.value;
return dbHelper.addItem(itemValue, location, userID)
.then((data) =>
const speechText = `You have added $itemValue, placed at $location. You can say add to add another one or remove to remove item`;
return responseBuilder
.speak(speechText)
.reprompt(GENERAL_REPROMPT)
.getResponse();
)
.catch((err) =>
console.log("Error occured while saving it", err);
const speechText = "we cannot save your item right now. Try again!"
return responseBuilder
.speak(speechText)
.getResponse();
)
,
;

const GetItemIntentHandler =
canHandle(handlerInput)
return handlerInput.requestEnvelope.request.type === 'IntentRequest'
&& handlerInput.requestEnvelope.request.intent.name === 'GetItemIntent';
,
async handle(handlerInput)
const responseBuilder = handlerInput;
//const userID = handlerInput.requestEnvelope.context.System.user.userId;
const itemName= slots.itemValue.value;
return dbHelper.getItem(itemName)
.then((data) =>
var speechText = "Your items are "
if (data.length == 0)
speechText = "You do not have any favourite item yet, add item by saying add itemname "
else
const datas = data.map(e => e.itemName + " " + e.Location);
speechText += datas.join(" ,")

return responseBuilder
.speak(speechText)
.reprompt(GENERAL_REPROMPT)
.getResponse();
)
.catch((err) =>
const speechText = "we cannot get your item right now. Try again!"
return responseBuilder
.speak(speechText)
.getResponse();
)



const InProgressRemoveItemIntentHandler =
canHandle(handlerInput)
const request = handlerInput.requestEnvelope.request;
return request.type === 'IntentRequest' &&
request.intent.name === 'RemoveItemIntent' &&
request.dialogState !== 'COMPLETED';
,
handle(handlerInput)
const currentIntent = handlerInput.requestEnvelope.request.intent;
return handlerInput.responseBuilder
.addDelegateDirective(currentIntent)
.getResponse();



const RemoveItemIntentHandler =
canHandle(handlerInput)
return handlerInput.requestEnvelope.request.type === 'IntentRequest'
&& handlerInput.requestEnvelope.request.intent.name === 'RemoveItemIntent';
,
handle(handlerInput)
const responseBuilder = handlerInput;
const userID = handlerInput.requestEnvelope.context.System.user.userId;
const slots = handlerInput.requestEnvelope.request.intent.slots;
const itemValue = slots.itemValue.value;
return dbHelper.removeItem(itemValue, userID)
.then((data) =>
const speechText = `You have removed item with name $itemValue you can add another one by saying add`
return responseBuilder
.speak(speechText)
.reprompt(GENERAL_REPROMPT)
.getResponse();
)
.catch((err) =>
const speechText = `You do not have item with name $itemValue, you can add it by saying add`
return responseBuilder
.speak(speechText)
.reprompt(GENERAL_REPROMPT)
.getResponse();
)



const HelpIntentHandler =
canHandle(handlerInput)
return handlerInput.requestEnvelope.request.type === 'IntentRequest'
&& handlerInput.requestEnvelope.request.intent.name === 'AMAZON.HelpIntent';
,
handle(handlerInput)
const speechText = 'You can introduce yourself by telling me your name';

return handlerInput.responseBuilder
.speak(speechText)
.reprompt(speechText)
.getResponse();
,
;

const CancelAndStopIntentHandler =
canHandle(handlerInput)
return handlerInput.requestEnvelope.request.type === 'IntentRequest'
&& (handlerInput.requestEnvelope.request.intent.name === 'AMAZON.CancelIntent'
,
handle(handlerInput)
const speechText = 'Goodbye!';

return handlerInput.responseBuilder
.speak(speechText)
.getResponse();
,
;

const SessionEndedRequestHandler =
canHandle(handlerInput)
return handlerInput.requestEnvelope.request.type === 'SessionEndedRequest';
,
handle(handlerInput)
console.log(`Session ended with reason: $handlerInput.requestEnvelope.request.reason`);

return handlerInput.responseBuilder.getResponse();
,
;

const ErrorHandler =
canHandle()
return true;
,
handle(handlerInput, error)
console.log(`Error handled: $error.message`);

return handlerInput.responseBuilder
.speak('Sorry, I can't understand the command. Please say again.')
.reprompt('Sorry, I can't understand the command. Please say again.')
.getResponse();
,
;

const skillBuilder = Alexa.SkillBuilders.standard();

exports.handler = skillBuilder
.addRequestHandlers(
LaunchRequestHandler,
InProgressAddItemIntentHandler,
AddItemIntentHandler,
GetItemIntentHandler,
InProgressRemoveItemIntentHandler,
RemoveItemIntentHandler,
HelpIntentHandler,
CancelAndStopIntentHandler,
SessionEndedRequestHandler
)
.addErrorHandlers(ErrorHandler)
.withTableName(dynamoDBTableName)
.withAutoCreateTable(true)
.lambda();








/*```````````dbHelper.js`````````````*/
var AWS = require("aws-sdk");
AWS.config.update(
region: "us-east-1"
);
const tableName = "FORGETABLE_THINGS";

var dbHelper = function() ;
var docClient = new AWS.DynamoDB.DocumentClient();

dbHelper.prototype.addItem = (item, location, userID) =>
return new Promise((resolve, reject) =>
const params =
TableName: tableName,
Item:
'itemName': item,
'Location': location,
'userId': userID,


;
docClient.put(params, (err, data) =>
if (err)
console.log("Unable to insert =>", JSON.stringify(err))
return reject("Unable to insert");

console.log("Saved Data, ", JSON.stringify(data));
resolve(data);
);
);


dbHelper.prototype.getItem = (userID) =>
return new Promise((resolve, reject) =>
const params =
TableName: tableName,
KeyConditionExpression: "#userID = :user_id",
ExpressionAttributeNames:
"#userID": "userId"
"itemName": "itemName"
,
ExpressionAttributeValues:
":user_id": userID



docClient.query(params, (err, data) =>
if (err)
console.error("Unable to read item. Error JSON:", JSON.stringify(err, null, 2));
return reject(JSON.stringify(err, null, 2))

console.log("GetItem succeeded:", JSON.stringify(data, null, 2));
resolve(data.Items)

)
);


dbHelper.prototype.removeItem = (item, userID) =>
return new Promise((resolve, reject) =>
const params =
TableName: tableName,
Key:
"userId": userID,
"itemName": item
,
ConditionExpression: "attribute_exists(itemName)"

docClient.delete(params, function(err, data)
if (err)
console.error("Unable to delete item. Error JSON:", JSON.stringify(err, null, 2));
return reject(JSON.stringify(err, null, 2));

console.log(JSON.stringify(err));
console.log("DeleteItem succeeded:", JSON.stringify(data, null, 2));
resolve();
)
);
;

module.exports = new dbHelper();












share|improve this question




























    0















    I've been trying to develop a skill in Alexa that can store data in amazon DynamoDB Table. For now i'm able to add data (i.e. an item name) along with an attribute (i.e. item location) into the DynamoDB table using voice commands, i'm also able to remove a specific item from the table. But now I want alexa to get a specific item along with its attribute (location) from the Table whenever i say Alexa get itemName.



    I have created two separate files index.js to handle with the intent requests and DbHelper.js to pass the parameters to the table. I've included the code in both the files below.
    i am using AWS Lambda function to host my skill's endpoint and using NodeJs to code the lambda function.



    I've tried using different query options included in aws-sdk like docClient.get, docClient.scan and docClient.query, but since i'm new to this all i was able to do is to get all the items from the table not a specific item.



    I expect to get a specific item from the table but i get all the items that are present in the table.






    /* ```````````````Index.js```````````````*/

    const Alexa = require('ask-sdk');
    const dbHelper = require('./helpers/dbHelper');
    const GENERAL_REPROMPT = "What would you like to do?";
    const dynamoDBTableName = "FORGETABLE_THINGS";
    const LaunchRequestHandler =
    canHandle(handlerInput)
    return handlerInput.requestEnvelope.request.type === 'LaunchRequest';
    ,
    handle(handlerInput)
    const speechText = 'Hello there. What is your favourite thing? You can say add itemname to add your item or say get to get your items.';
    const repromptText = 'What would you like to do? You can say HELP to get available options';

    return handlerInput.responseBuilder
    .speak(speechText)
    .reprompt(repromptText)
    .getResponse();
    ,
    ;

    const InProgressAddItemIntentHandler =
    canHandle(handlerInput)
    const request = handlerInput.requestEnvelope.request;
    return request.type === 'IntentRequest' &&
    request.intent.name === 'AddItemIntent' &&
    request.dialogState !== 'COMPLETED';
    ,
    handle(handlerInput)
    const currentIntent = handlerInput.requestEnvelope.request.intent;
    return handlerInput.responseBuilder
    .addDelegateDirective(currentIntent)
    .getResponse();



    const AddItemIntentHandler =
    canHandle(handlerInput)
    return handlerInput.requestEnvelope.request.type === 'IntentRequest'
    && handlerInput.requestEnvelope.request.intent.name === 'AddItemIntent';
    ,
    async handle(handlerInput)
    const responseBuilder = handlerInput;
    const userID = handlerInput.requestEnvelope.context.System.user.userId;
    const slots = handlerInput.requestEnvelope.request.intent.slots;
    const itemValue = slots.itemValue.value;
    const location = slots.location.value;
    return dbHelper.addItem(itemValue, location, userID)
    .then((data) =>
    const speechText = `You have added $itemValue, placed at $location. You can say add to add another one or remove to remove item`;
    return responseBuilder
    .speak(speechText)
    .reprompt(GENERAL_REPROMPT)
    .getResponse();
    )
    .catch((err) =>
    console.log("Error occured while saving it", err);
    const speechText = "we cannot save your item right now. Try again!"
    return responseBuilder
    .speak(speechText)
    .getResponse();
    )
    ,
    ;

    const GetItemIntentHandler =
    canHandle(handlerInput)
    return handlerInput.requestEnvelope.request.type === 'IntentRequest'
    && handlerInput.requestEnvelope.request.intent.name === 'GetItemIntent';
    ,
    async handle(handlerInput)
    const responseBuilder = handlerInput;
    //const userID = handlerInput.requestEnvelope.context.System.user.userId;
    const itemName= slots.itemValue.value;
    return dbHelper.getItem(itemName)
    .then((data) =>
    var speechText = "Your items are "
    if (data.length == 0)
    speechText = "You do not have any favourite item yet, add item by saying add itemname "
    else
    const datas = data.map(e => e.itemName + " " + e.Location);
    speechText += datas.join(" ,")

    return responseBuilder
    .speak(speechText)
    .reprompt(GENERAL_REPROMPT)
    .getResponse();
    )
    .catch((err) =>
    const speechText = "we cannot get your item right now. Try again!"
    return responseBuilder
    .speak(speechText)
    .getResponse();
    )



    const InProgressRemoveItemIntentHandler =
    canHandle(handlerInput)
    const request = handlerInput.requestEnvelope.request;
    return request.type === 'IntentRequest' &&
    request.intent.name === 'RemoveItemIntent' &&
    request.dialogState !== 'COMPLETED';
    ,
    handle(handlerInput)
    const currentIntent = handlerInput.requestEnvelope.request.intent;
    return handlerInput.responseBuilder
    .addDelegateDirective(currentIntent)
    .getResponse();



    const RemoveItemIntentHandler =
    canHandle(handlerInput)
    return handlerInput.requestEnvelope.request.type === 'IntentRequest'
    && handlerInput.requestEnvelope.request.intent.name === 'RemoveItemIntent';
    ,
    handle(handlerInput)
    const responseBuilder = handlerInput;
    const userID = handlerInput.requestEnvelope.context.System.user.userId;
    const slots = handlerInput.requestEnvelope.request.intent.slots;
    const itemValue = slots.itemValue.value;
    return dbHelper.removeItem(itemValue, userID)
    .then((data) =>
    const speechText = `You have removed item with name $itemValue you can add another one by saying add`
    return responseBuilder
    .speak(speechText)
    .reprompt(GENERAL_REPROMPT)
    .getResponse();
    )
    .catch((err) =>
    const speechText = `You do not have item with name $itemValue, you can add it by saying add`
    return responseBuilder
    .speak(speechText)
    .reprompt(GENERAL_REPROMPT)
    .getResponse();
    )



    const HelpIntentHandler =
    canHandle(handlerInput)
    return handlerInput.requestEnvelope.request.type === 'IntentRequest'
    && handlerInput.requestEnvelope.request.intent.name === 'AMAZON.HelpIntent';
    ,
    handle(handlerInput)
    const speechText = 'You can introduce yourself by telling me your name';

    return handlerInput.responseBuilder
    .speak(speechText)
    .reprompt(speechText)
    .getResponse();
    ,
    ;

    const CancelAndStopIntentHandler =
    canHandle(handlerInput)
    return handlerInput.requestEnvelope.request.type === 'IntentRequest'
    && (handlerInput.requestEnvelope.request.intent.name === 'AMAZON.CancelIntent'
    ,
    handle(handlerInput)
    const speechText = 'Goodbye!';

    return handlerInput.responseBuilder
    .speak(speechText)
    .getResponse();
    ,
    ;

    const SessionEndedRequestHandler =
    canHandle(handlerInput)
    return handlerInput.requestEnvelope.request.type === 'SessionEndedRequest';
    ,
    handle(handlerInput)
    console.log(`Session ended with reason: $handlerInput.requestEnvelope.request.reason`);

    return handlerInput.responseBuilder.getResponse();
    ,
    ;

    const ErrorHandler =
    canHandle()
    return true;
    ,
    handle(handlerInput, error)
    console.log(`Error handled: $error.message`);

    return handlerInput.responseBuilder
    .speak('Sorry, I can't understand the command. Please say again.')
    .reprompt('Sorry, I can't understand the command. Please say again.')
    .getResponse();
    ,
    ;

    const skillBuilder = Alexa.SkillBuilders.standard();

    exports.handler = skillBuilder
    .addRequestHandlers(
    LaunchRequestHandler,
    InProgressAddItemIntentHandler,
    AddItemIntentHandler,
    GetItemIntentHandler,
    InProgressRemoveItemIntentHandler,
    RemoveItemIntentHandler,
    HelpIntentHandler,
    CancelAndStopIntentHandler,
    SessionEndedRequestHandler
    )
    .addErrorHandlers(ErrorHandler)
    .withTableName(dynamoDBTableName)
    .withAutoCreateTable(true)
    .lambda();








    /*```````````dbHelper.js`````````````*/
    var AWS = require("aws-sdk");
    AWS.config.update(
    region: "us-east-1"
    );
    const tableName = "FORGETABLE_THINGS";

    var dbHelper = function() ;
    var docClient = new AWS.DynamoDB.DocumentClient();

    dbHelper.prototype.addItem = (item, location, userID) =>
    return new Promise((resolve, reject) =>
    const params =
    TableName: tableName,
    Item:
    'itemName': item,
    'Location': location,
    'userId': userID,


    ;
    docClient.put(params, (err, data) =>
    if (err)
    console.log("Unable to insert =>", JSON.stringify(err))
    return reject("Unable to insert");

    console.log("Saved Data, ", JSON.stringify(data));
    resolve(data);
    );
    );


    dbHelper.prototype.getItem = (userID) =>
    return new Promise((resolve, reject) =>
    const params =
    TableName: tableName,
    KeyConditionExpression: "#userID = :user_id",
    ExpressionAttributeNames:
    "#userID": "userId"
    "itemName": "itemName"
    ,
    ExpressionAttributeValues:
    ":user_id": userID



    docClient.query(params, (err, data) =>
    if (err)
    console.error("Unable to read item. Error JSON:", JSON.stringify(err, null, 2));
    return reject(JSON.stringify(err, null, 2))

    console.log("GetItem succeeded:", JSON.stringify(data, null, 2));
    resolve(data.Items)

    )
    );


    dbHelper.prototype.removeItem = (item, userID) =>
    return new Promise((resolve, reject) =>
    const params =
    TableName: tableName,
    Key:
    "userId": userID,
    "itemName": item
    ,
    ConditionExpression: "attribute_exists(itemName)"

    docClient.delete(params, function(err, data)
    if (err)
    console.error("Unable to delete item. Error JSON:", JSON.stringify(err, null, 2));
    return reject(JSON.stringify(err, null, 2));

    console.log(JSON.stringify(err));
    console.log("DeleteItem succeeded:", JSON.stringify(data, null, 2));
    resolve();
    )
    );
    ;

    module.exports = new dbHelper();












    share|improve this question
























      0












      0








      0


      2






      I've been trying to develop a skill in Alexa that can store data in amazon DynamoDB Table. For now i'm able to add data (i.e. an item name) along with an attribute (i.e. item location) into the DynamoDB table using voice commands, i'm also able to remove a specific item from the table. But now I want alexa to get a specific item along with its attribute (location) from the Table whenever i say Alexa get itemName.



      I have created two separate files index.js to handle with the intent requests and DbHelper.js to pass the parameters to the table. I've included the code in both the files below.
      i am using AWS Lambda function to host my skill's endpoint and using NodeJs to code the lambda function.



      I've tried using different query options included in aws-sdk like docClient.get, docClient.scan and docClient.query, but since i'm new to this all i was able to do is to get all the items from the table not a specific item.



      I expect to get a specific item from the table but i get all the items that are present in the table.






      /* ```````````````Index.js```````````````*/

      const Alexa = require('ask-sdk');
      const dbHelper = require('./helpers/dbHelper');
      const GENERAL_REPROMPT = "What would you like to do?";
      const dynamoDBTableName = "FORGETABLE_THINGS";
      const LaunchRequestHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'LaunchRequest';
      ,
      handle(handlerInput)
      const speechText = 'Hello there. What is your favourite thing? You can say add itemname to add your item or say get to get your items.';
      const repromptText = 'What would you like to do? You can say HELP to get available options';

      return handlerInput.responseBuilder
      .speak(speechText)
      .reprompt(repromptText)
      .getResponse();
      ,
      ;

      const InProgressAddItemIntentHandler =
      canHandle(handlerInput)
      const request = handlerInput.requestEnvelope.request;
      return request.type === 'IntentRequest' &&
      request.intent.name === 'AddItemIntent' &&
      request.dialogState !== 'COMPLETED';
      ,
      handle(handlerInput)
      const currentIntent = handlerInput.requestEnvelope.request.intent;
      return handlerInput.responseBuilder
      .addDelegateDirective(currentIntent)
      .getResponse();



      const AddItemIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'AddItemIntent';
      ,
      async handle(handlerInput)
      const responseBuilder = handlerInput;
      const userID = handlerInput.requestEnvelope.context.System.user.userId;
      const slots = handlerInput.requestEnvelope.request.intent.slots;
      const itemValue = slots.itemValue.value;
      const location = slots.location.value;
      return dbHelper.addItem(itemValue, location, userID)
      .then((data) =>
      const speechText = `You have added $itemValue, placed at $location. You can say add to add another one or remove to remove item`;
      return responseBuilder
      .speak(speechText)
      .reprompt(GENERAL_REPROMPT)
      .getResponse();
      )
      .catch((err) =>
      console.log("Error occured while saving it", err);
      const speechText = "we cannot save your item right now. Try again!"
      return responseBuilder
      .speak(speechText)
      .getResponse();
      )
      ,
      ;

      const GetItemIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'GetItemIntent';
      ,
      async handle(handlerInput)
      const responseBuilder = handlerInput;
      //const userID = handlerInput.requestEnvelope.context.System.user.userId;
      const itemName= slots.itemValue.value;
      return dbHelper.getItem(itemName)
      .then((data) =>
      var speechText = "Your items are "
      if (data.length == 0)
      speechText = "You do not have any favourite item yet, add item by saying add itemname "
      else
      const datas = data.map(e => e.itemName + " " + e.Location);
      speechText += datas.join(" ,")

      return responseBuilder
      .speak(speechText)
      .reprompt(GENERAL_REPROMPT)
      .getResponse();
      )
      .catch((err) =>
      const speechText = "we cannot get your item right now. Try again!"
      return responseBuilder
      .speak(speechText)
      .getResponse();
      )



      const InProgressRemoveItemIntentHandler =
      canHandle(handlerInput)
      const request = handlerInput.requestEnvelope.request;
      return request.type === 'IntentRequest' &&
      request.intent.name === 'RemoveItemIntent' &&
      request.dialogState !== 'COMPLETED';
      ,
      handle(handlerInput)
      const currentIntent = handlerInput.requestEnvelope.request.intent;
      return handlerInput.responseBuilder
      .addDelegateDirective(currentIntent)
      .getResponse();



      const RemoveItemIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'RemoveItemIntent';
      ,
      handle(handlerInput)
      const responseBuilder = handlerInput;
      const userID = handlerInput.requestEnvelope.context.System.user.userId;
      const slots = handlerInput.requestEnvelope.request.intent.slots;
      const itemValue = slots.itemValue.value;
      return dbHelper.removeItem(itemValue, userID)
      .then((data) =>
      const speechText = `You have removed item with name $itemValue you can add another one by saying add`
      return responseBuilder
      .speak(speechText)
      .reprompt(GENERAL_REPROMPT)
      .getResponse();
      )
      .catch((err) =>
      const speechText = `You do not have item with name $itemValue, you can add it by saying add`
      return responseBuilder
      .speak(speechText)
      .reprompt(GENERAL_REPROMPT)
      .getResponse();
      )



      const HelpIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'AMAZON.HelpIntent';
      ,
      handle(handlerInput)
      const speechText = 'You can introduce yourself by telling me your name';

      return handlerInput.responseBuilder
      .speak(speechText)
      .reprompt(speechText)
      .getResponse();
      ,
      ;

      const CancelAndStopIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && (handlerInput.requestEnvelope.request.intent.name === 'AMAZON.CancelIntent'
      ,
      handle(handlerInput)
      const speechText = 'Goodbye!';

      return handlerInput.responseBuilder
      .speak(speechText)
      .getResponse();
      ,
      ;

      const SessionEndedRequestHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'SessionEndedRequest';
      ,
      handle(handlerInput)
      console.log(`Session ended with reason: $handlerInput.requestEnvelope.request.reason`);

      return handlerInput.responseBuilder.getResponse();
      ,
      ;

      const ErrorHandler =
      canHandle()
      return true;
      ,
      handle(handlerInput, error)
      console.log(`Error handled: $error.message`);

      return handlerInput.responseBuilder
      .speak('Sorry, I can't understand the command. Please say again.')
      .reprompt('Sorry, I can't understand the command. Please say again.')
      .getResponse();
      ,
      ;

      const skillBuilder = Alexa.SkillBuilders.standard();

      exports.handler = skillBuilder
      .addRequestHandlers(
      LaunchRequestHandler,
      InProgressAddItemIntentHandler,
      AddItemIntentHandler,
      GetItemIntentHandler,
      InProgressRemoveItemIntentHandler,
      RemoveItemIntentHandler,
      HelpIntentHandler,
      CancelAndStopIntentHandler,
      SessionEndedRequestHandler
      )
      .addErrorHandlers(ErrorHandler)
      .withTableName(dynamoDBTableName)
      .withAutoCreateTable(true)
      .lambda();








      /*```````````dbHelper.js`````````````*/
      var AWS = require("aws-sdk");
      AWS.config.update(
      region: "us-east-1"
      );
      const tableName = "FORGETABLE_THINGS";

      var dbHelper = function() ;
      var docClient = new AWS.DynamoDB.DocumentClient();

      dbHelper.prototype.addItem = (item, location, userID) =>
      return new Promise((resolve, reject) =>
      const params =
      TableName: tableName,
      Item:
      'itemName': item,
      'Location': location,
      'userId': userID,


      ;
      docClient.put(params, (err, data) =>
      if (err)
      console.log("Unable to insert =>", JSON.stringify(err))
      return reject("Unable to insert");

      console.log("Saved Data, ", JSON.stringify(data));
      resolve(data);
      );
      );


      dbHelper.prototype.getItem = (userID) =>
      return new Promise((resolve, reject) =>
      const params =
      TableName: tableName,
      KeyConditionExpression: "#userID = :user_id",
      ExpressionAttributeNames:
      "#userID": "userId"
      "itemName": "itemName"
      ,
      ExpressionAttributeValues:
      ":user_id": userID



      docClient.query(params, (err, data) =>
      if (err)
      console.error("Unable to read item. Error JSON:", JSON.stringify(err, null, 2));
      return reject(JSON.stringify(err, null, 2))

      console.log("GetItem succeeded:", JSON.stringify(data, null, 2));
      resolve(data.Items)

      )
      );


      dbHelper.prototype.removeItem = (item, userID) =>
      return new Promise((resolve, reject) =>
      const params =
      TableName: tableName,
      Key:
      "userId": userID,
      "itemName": item
      ,
      ConditionExpression: "attribute_exists(itemName)"

      docClient.delete(params, function(err, data)
      if (err)
      console.error("Unable to delete item. Error JSON:", JSON.stringify(err, null, 2));
      return reject(JSON.stringify(err, null, 2));

      console.log(JSON.stringify(err));
      console.log("DeleteItem succeeded:", JSON.stringify(data, null, 2));
      resolve();
      )
      );
      ;

      module.exports = new dbHelper();












      share|improve this question














      I've been trying to develop a skill in Alexa that can store data in amazon DynamoDB Table. For now i'm able to add data (i.e. an item name) along with an attribute (i.e. item location) into the DynamoDB table using voice commands, i'm also able to remove a specific item from the table. But now I want alexa to get a specific item along with its attribute (location) from the Table whenever i say Alexa get itemName.



      I have created two separate files index.js to handle with the intent requests and DbHelper.js to pass the parameters to the table. I've included the code in both the files below.
      i am using AWS Lambda function to host my skill's endpoint and using NodeJs to code the lambda function.



      I've tried using different query options included in aws-sdk like docClient.get, docClient.scan and docClient.query, but since i'm new to this all i was able to do is to get all the items from the table not a specific item.



      I expect to get a specific item from the table but i get all the items that are present in the table.






      /* ```````````````Index.js```````````````*/

      const Alexa = require('ask-sdk');
      const dbHelper = require('./helpers/dbHelper');
      const GENERAL_REPROMPT = "What would you like to do?";
      const dynamoDBTableName = "FORGETABLE_THINGS";
      const LaunchRequestHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'LaunchRequest';
      ,
      handle(handlerInput)
      const speechText = 'Hello there. What is your favourite thing? You can say add itemname to add your item or say get to get your items.';
      const repromptText = 'What would you like to do? You can say HELP to get available options';

      return handlerInput.responseBuilder
      .speak(speechText)
      .reprompt(repromptText)
      .getResponse();
      ,
      ;

      const InProgressAddItemIntentHandler =
      canHandle(handlerInput)
      const request = handlerInput.requestEnvelope.request;
      return request.type === 'IntentRequest' &&
      request.intent.name === 'AddItemIntent' &&
      request.dialogState !== 'COMPLETED';
      ,
      handle(handlerInput)
      const currentIntent = handlerInput.requestEnvelope.request.intent;
      return handlerInput.responseBuilder
      .addDelegateDirective(currentIntent)
      .getResponse();



      const AddItemIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'AddItemIntent';
      ,
      async handle(handlerInput)
      const responseBuilder = handlerInput;
      const userID = handlerInput.requestEnvelope.context.System.user.userId;
      const slots = handlerInput.requestEnvelope.request.intent.slots;
      const itemValue = slots.itemValue.value;
      const location = slots.location.value;
      return dbHelper.addItem(itemValue, location, userID)
      .then((data) =>
      const speechText = `You have added $itemValue, placed at $location. You can say add to add another one or remove to remove item`;
      return responseBuilder
      .speak(speechText)
      .reprompt(GENERAL_REPROMPT)
      .getResponse();
      )
      .catch((err) =>
      console.log("Error occured while saving it", err);
      const speechText = "we cannot save your item right now. Try again!"
      return responseBuilder
      .speak(speechText)
      .getResponse();
      )
      ,
      ;

      const GetItemIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'GetItemIntent';
      ,
      async handle(handlerInput)
      const responseBuilder = handlerInput;
      //const userID = handlerInput.requestEnvelope.context.System.user.userId;
      const itemName= slots.itemValue.value;
      return dbHelper.getItem(itemName)
      .then((data) =>
      var speechText = "Your items are "
      if (data.length == 0)
      speechText = "You do not have any favourite item yet, add item by saying add itemname "
      else
      const datas = data.map(e => e.itemName + " " + e.Location);
      speechText += datas.join(" ,")

      return responseBuilder
      .speak(speechText)
      .reprompt(GENERAL_REPROMPT)
      .getResponse();
      )
      .catch((err) =>
      const speechText = "we cannot get your item right now. Try again!"
      return responseBuilder
      .speak(speechText)
      .getResponse();
      )



      const InProgressRemoveItemIntentHandler =
      canHandle(handlerInput)
      const request = handlerInput.requestEnvelope.request;
      return request.type === 'IntentRequest' &&
      request.intent.name === 'RemoveItemIntent' &&
      request.dialogState !== 'COMPLETED';
      ,
      handle(handlerInput)
      const currentIntent = handlerInput.requestEnvelope.request.intent;
      return handlerInput.responseBuilder
      .addDelegateDirective(currentIntent)
      .getResponse();



      const RemoveItemIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'RemoveItemIntent';
      ,
      handle(handlerInput)
      const responseBuilder = handlerInput;
      const userID = handlerInput.requestEnvelope.context.System.user.userId;
      const slots = handlerInput.requestEnvelope.request.intent.slots;
      const itemValue = slots.itemValue.value;
      return dbHelper.removeItem(itemValue, userID)
      .then((data) =>
      const speechText = `You have removed item with name $itemValue you can add another one by saying add`
      return responseBuilder
      .speak(speechText)
      .reprompt(GENERAL_REPROMPT)
      .getResponse();
      )
      .catch((err) =>
      const speechText = `You do not have item with name $itemValue, you can add it by saying add`
      return responseBuilder
      .speak(speechText)
      .reprompt(GENERAL_REPROMPT)
      .getResponse();
      )



      const HelpIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'AMAZON.HelpIntent';
      ,
      handle(handlerInput)
      const speechText = 'You can introduce yourself by telling me your name';

      return handlerInput.responseBuilder
      .speak(speechText)
      .reprompt(speechText)
      .getResponse();
      ,
      ;

      const CancelAndStopIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && (handlerInput.requestEnvelope.request.intent.name === 'AMAZON.CancelIntent'
      ,
      handle(handlerInput)
      const speechText = 'Goodbye!';

      return handlerInput.responseBuilder
      .speak(speechText)
      .getResponse();
      ,
      ;

      const SessionEndedRequestHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'SessionEndedRequest';
      ,
      handle(handlerInput)
      console.log(`Session ended with reason: $handlerInput.requestEnvelope.request.reason`);

      return handlerInput.responseBuilder.getResponse();
      ,
      ;

      const ErrorHandler =
      canHandle()
      return true;
      ,
      handle(handlerInput, error)
      console.log(`Error handled: $error.message`);

      return handlerInput.responseBuilder
      .speak('Sorry, I can't understand the command. Please say again.')
      .reprompt('Sorry, I can't understand the command. Please say again.')
      .getResponse();
      ,
      ;

      const skillBuilder = Alexa.SkillBuilders.standard();

      exports.handler = skillBuilder
      .addRequestHandlers(
      LaunchRequestHandler,
      InProgressAddItemIntentHandler,
      AddItemIntentHandler,
      GetItemIntentHandler,
      InProgressRemoveItemIntentHandler,
      RemoveItemIntentHandler,
      HelpIntentHandler,
      CancelAndStopIntentHandler,
      SessionEndedRequestHandler
      )
      .addErrorHandlers(ErrorHandler)
      .withTableName(dynamoDBTableName)
      .withAutoCreateTable(true)
      .lambda();








      /*```````````dbHelper.js`````````````*/
      var AWS = require("aws-sdk");
      AWS.config.update(
      region: "us-east-1"
      );
      const tableName = "FORGETABLE_THINGS";

      var dbHelper = function() ;
      var docClient = new AWS.DynamoDB.DocumentClient();

      dbHelper.prototype.addItem = (item, location, userID) =>
      return new Promise((resolve, reject) =>
      const params =
      TableName: tableName,
      Item:
      'itemName': item,
      'Location': location,
      'userId': userID,


      ;
      docClient.put(params, (err, data) =>
      if (err)
      console.log("Unable to insert =>", JSON.stringify(err))
      return reject("Unable to insert");

      console.log("Saved Data, ", JSON.stringify(data));
      resolve(data);
      );
      );


      dbHelper.prototype.getItem = (userID) =>
      return new Promise((resolve, reject) =>
      const params =
      TableName: tableName,
      KeyConditionExpression: "#userID = :user_id",
      ExpressionAttributeNames:
      "#userID": "userId"
      "itemName": "itemName"
      ,
      ExpressionAttributeValues:
      ":user_id": userID



      docClient.query(params, (err, data) =>
      if (err)
      console.error("Unable to read item. Error JSON:", JSON.stringify(err, null, 2));
      return reject(JSON.stringify(err, null, 2))

      console.log("GetItem succeeded:", JSON.stringify(data, null, 2));
      resolve(data.Items)

      )
      );


      dbHelper.prototype.removeItem = (item, userID) =>
      return new Promise((resolve, reject) =>
      const params =
      TableName: tableName,
      Key:
      "userId": userID,
      "itemName": item
      ,
      ConditionExpression: "attribute_exists(itemName)"

      docClient.delete(params, function(err, data)
      if (err)
      console.error("Unable to delete item. Error JSON:", JSON.stringify(err, null, 2));
      return reject(JSON.stringify(err, null, 2));

      console.log(JSON.stringify(err));
      console.log("DeleteItem succeeded:", JSON.stringify(data, null, 2));
      resolve();
      )
      );
      ;

      module.exports = new dbHelper();








      /* ```````````````Index.js```````````````*/

      const Alexa = require('ask-sdk');
      const dbHelper = require('./helpers/dbHelper');
      const GENERAL_REPROMPT = "What would you like to do?";
      const dynamoDBTableName = "FORGETABLE_THINGS";
      const LaunchRequestHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'LaunchRequest';
      ,
      handle(handlerInput)
      const speechText = 'Hello there. What is your favourite thing? You can say add itemname to add your item or say get to get your items.';
      const repromptText = 'What would you like to do? You can say HELP to get available options';

      return handlerInput.responseBuilder
      .speak(speechText)
      .reprompt(repromptText)
      .getResponse();
      ,
      ;

      const InProgressAddItemIntentHandler =
      canHandle(handlerInput)
      const request = handlerInput.requestEnvelope.request;
      return request.type === 'IntentRequest' &&
      request.intent.name === 'AddItemIntent' &&
      request.dialogState !== 'COMPLETED';
      ,
      handle(handlerInput)
      const currentIntent = handlerInput.requestEnvelope.request.intent;
      return handlerInput.responseBuilder
      .addDelegateDirective(currentIntent)
      .getResponse();



      const AddItemIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'AddItemIntent';
      ,
      async handle(handlerInput)
      const responseBuilder = handlerInput;
      const userID = handlerInput.requestEnvelope.context.System.user.userId;
      const slots = handlerInput.requestEnvelope.request.intent.slots;
      const itemValue = slots.itemValue.value;
      const location = slots.location.value;
      return dbHelper.addItem(itemValue, location, userID)
      .then((data) =>
      const speechText = `You have added $itemValue, placed at $location. You can say add to add another one or remove to remove item`;
      return responseBuilder
      .speak(speechText)
      .reprompt(GENERAL_REPROMPT)
      .getResponse();
      )
      .catch((err) =>
      console.log("Error occured while saving it", err);
      const speechText = "we cannot save your item right now. Try again!"
      return responseBuilder
      .speak(speechText)
      .getResponse();
      )
      ,
      ;

      const GetItemIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'GetItemIntent';
      ,
      async handle(handlerInput)
      const responseBuilder = handlerInput;
      //const userID = handlerInput.requestEnvelope.context.System.user.userId;
      const itemName= slots.itemValue.value;
      return dbHelper.getItem(itemName)
      .then((data) =>
      var speechText = "Your items are "
      if (data.length == 0)
      speechText = "You do not have any favourite item yet, add item by saying add itemname "
      else
      const datas = data.map(e => e.itemName + " " + e.Location);
      speechText += datas.join(" ,")

      return responseBuilder
      .speak(speechText)
      .reprompt(GENERAL_REPROMPT)
      .getResponse();
      )
      .catch((err) =>
      const speechText = "we cannot get your item right now. Try again!"
      return responseBuilder
      .speak(speechText)
      .getResponse();
      )



      const InProgressRemoveItemIntentHandler =
      canHandle(handlerInput)
      const request = handlerInput.requestEnvelope.request;
      return request.type === 'IntentRequest' &&
      request.intent.name === 'RemoveItemIntent' &&
      request.dialogState !== 'COMPLETED';
      ,
      handle(handlerInput)
      const currentIntent = handlerInput.requestEnvelope.request.intent;
      return handlerInput.responseBuilder
      .addDelegateDirective(currentIntent)
      .getResponse();



      const RemoveItemIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'RemoveItemIntent';
      ,
      handle(handlerInput)
      const responseBuilder = handlerInput;
      const userID = handlerInput.requestEnvelope.context.System.user.userId;
      const slots = handlerInput.requestEnvelope.request.intent.slots;
      const itemValue = slots.itemValue.value;
      return dbHelper.removeItem(itemValue, userID)
      .then((data) =>
      const speechText = `You have removed item with name $itemValue you can add another one by saying add`
      return responseBuilder
      .speak(speechText)
      .reprompt(GENERAL_REPROMPT)
      .getResponse();
      )
      .catch((err) =>
      const speechText = `You do not have item with name $itemValue, you can add it by saying add`
      return responseBuilder
      .speak(speechText)
      .reprompt(GENERAL_REPROMPT)
      .getResponse();
      )



      const HelpIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'AMAZON.HelpIntent';
      ,
      handle(handlerInput)
      const speechText = 'You can introduce yourself by telling me your name';

      return handlerInput.responseBuilder
      .speak(speechText)
      .reprompt(speechText)
      .getResponse();
      ,
      ;

      const CancelAndStopIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && (handlerInput.requestEnvelope.request.intent.name === 'AMAZON.CancelIntent'
      ,
      handle(handlerInput)
      const speechText = 'Goodbye!';

      return handlerInput.responseBuilder
      .speak(speechText)
      .getResponse();
      ,
      ;

      const SessionEndedRequestHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'SessionEndedRequest';
      ,
      handle(handlerInput)
      console.log(`Session ended with reason: $handlerInput.requestEnvelope.request.reason`);

      return handlerInput.responseBuilder.getResponse();
      ,
      ;

      const ErrorHandler =
      canHandle()
      return true;
      ,
      handle(handlerInput, error)
      console.log(`Error handled: $error.message`);

      return handlerInput.responseBuilder
      .speak('Sorry, I can't understand the command. Please say again.')
      .reprompt('Sorry, I can't understand the command. Please say again.')
      .getResponse();
      ,
      ;

      const skillBuilder = Alexa.SkillBuilders.standard();

      exports.handler = skillBuilder
      .addRequestHandlers(
      LaunchRequestHandler,
      InProgressAddItemIntentHandler,
      AddItemIntentHandler,
      GetItemIntentHandler,
      InProgressRemoveItemIntentHandler,
      RemoveItemIntentHandler,
      HelpIntentHandler,
      CancelAndStopIntentHandler,
      SessionEndedRequestHandler
      )
      .addErrorHandlers(ErrorHandler)
      .withTableName(dynamoDBTableName)
      .withAutoCreateTable(true)
      .lambda();





      /* ```````````````Index.js```````````````*/

      const Alexa = require('ask-sdk');
      const dbHelper = require('./helpers/dbHelper');
      const GENERAL_REPROMPT = "What would you like to do?";
      const dynamoDBTableName = "FORGETABLE_THINGS";
      const LaunchRequestHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'LaunchRequest';
      ,
      handle(handlerInput)
      const speechText = 'Hello there. What is your favourite thing? You can say add itemname to add your item or say get to get your items.';
      const repromptText = 'What would you like to do? You can say HELP to get available options';

      return handlerInput.responseBuilder
      .speak(speechText)
      .reprompt(repromptText)
      .getResponse();
      ,
      ;

      const InProgressAddItemIntentHandler =
      canHandle(handlerInput)
      const request = handlerInput.requestEnvelope.request;
      return request.type === 'IntentRequest' &&
      request.intent.name === 'AddItemIntent' &&
      request.dialogState !== 'COMPLETED';
      ,
      handle(handlerInput)
      const currentIntent = handlerInput.requestEnvelope.request.intent;
      return handlerInput.responseBuilder
      .addDelegateDirective(currentIntent)
      .getResponse();



      const AddItemIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'AddItemIntent';
      ,
      async handle(handlerInput)
      const responseBuilder = handlerInput;
      const userID = handlerInput.requestEnvelope.context.System.user.userId;
      const slots = handlerInput.requestEnvelope.request.intent.slots;
      const itemValue = slots.itemValue.value;
      const location = slots.location.value;
      return dbHelper.addItem(itemValue, location, userID)
      .then((data) =>
      const speechText = `You have added $itemValue, placed at $location. You can say add to add another one or remove to remove item`;
      return responseBuilder
      .speak(speechText)
      .reprompt(GENERAL_REPROMPT)
      .getResponse();
      )
      .catch((err) =>
      console.log("Error occured while saving it", err);
      const speechText = "we cannot save your item right now. Try again!"
      return responseBuilder
      .speak(speechText)
      .getResponse();
      )
      ,
      ;

      const GetItemIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'GetItemIntent';
      ,
      async handle(handlerInput)
      const responseBuilder = handlerInput;
      //const userID = handlerInput.requestEnvelope.context.System.user.userId;
      const itemName= slots.itemValue.value;
      return dbHelper.getItem(itemName)
      .then((data) =>
      var speechText = "Your items are "
      if (data.length == 0)
      speechText = "You do not have any favourite item yet, add item by saying add itemname "
      else
      const datas = data.map(e => e.itemName + " " + e.Location);
      speechText += datas.join(" ,")

      return responseBuilder
      .speak(speechText)
      .reprompt(GENERAL_REPROMPT)
      .getResponse();
      )
      .catch((err) =>
      const speechText = "we cannot get your item right now. Try again!"
      return responseBuilder
      .speak(speechText)
      .getResponse();
      )



      const InProgressRemoveItemIntentHandler =
      canHandle(handlerInput)
      const request = handlerInput.requestEnvelope.request;
      return request.type === 'IntentRequest' &&
      request.intent.name === 'RemoveItemIntent' &&
      request.dialogState !== 'COMPLETED';
      ,
      handle(handlerInput)
      const currentIntent = handlerInput.requestEnvelope.request.intent;
      return handlerInput.responseBuilder
      .addDelegateDirective(currentIntent)
      .getResponse();



      const RemoveItemIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'RemoveItemIntent';
      ,
      handle(handlerInput)
      const responseBuilder = handlerInput;
      const userID = handlerInput.requestEnvelope.context.System.user.userId;
      const slots = handlerInput.requestEnvelope.request.intent.slots;
      const itemValue = slots.itemValue.value;
      return dbHelper.removeItem(itemValue, userID)
      .then((data) =>
      const speechText = `You have removed item with name $itemValue you can add another one by saying add`
      return responseBuilder
      .speak(speechText)
      .reprompt(GENERAL_REPROMPT)
      .getResponse();
      )
      .catch((err) =>
      const speechText = `You do not have item with name $itemValue, you can add it by saying add`
      return responseBuilder
      .speak(speechText)
      .reprompt(GENERAL_REPROMPT)
      .getResponse();
      )



      const HelpIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'AMAZON.HelpIntent';
      ,
      handle(handlerInput)
      const speechText = 'You can introduce yourself by telling me your name';

      return handlerInput.responseBuilder
      .speak(speechText)
      .reprompt(speechText)
      .getResponse();
      ,
      ;

      const CancelAndStopIntentHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && (handlerInput.requestEnvelope.request.intent.name === 'AMAZON.CancelIntent'
      ,
      handle(handlerInput)
      const speechText = 'Goodbye!';

      return handlerInput.responseBuilder
      .speak(speechText)
      .getResponse();
      ,
      ;

      const SessionEndedRequestHandler =
      canHandle(handlerInput)
      return handlerInput.requestEnvelope.request.type === 'SessionEndedRequest';
      ,
      handle(handlerInput)
      console.log(`Session ended with reason: $handlerInput.requestEnvelope.request.reason`);

      return handlerInput.responseBuilder.getResponse();
      ,
      ;

      const ErrorHandler =
      canHandle()
      return true;
      ,
      handle(handlerInput, error)
      console.log(`Error handled: $error.message`);

      return handlerInput.responseBuilder
      .speak('Sorry, I can't understand the command. Please say again.')
      .reprompt('Sorry, I can't understand the command. Please say again.')
      .getResponse();
      ,
      ;

      const skillBuilder = Alexa.SkillBuilders.standard();

      exports.handler = skillBuilder
      .addRequestHandlers(
      LaunchRequestHandler,
      InProgressAddItemIntentHandler,
      AddItemIntentHandler,
      GetItemIntentHandler,
      InProgressRemoveItemIntentHandler,
      RemoveItemIntentHandler,
      HelpIntentHandler,
      CancelAndStopIntentHandler,
      SessionEndedRequestHandler
      )
      .addErrorHandlers(ErrorHandler)
      .withTableName(dynamoDBTableName)
      .withAutoCreateTable(true)
      .lambda();





      /*```````````dbHelper.js`````````````*/
      var AWS = require("aws-sdk");
      AWS.config.update(
      region: "us-east-1"
      );
      const tableName = "FORGETABLE_THINGS";

      var dbHelper = function() ;
      var docClient = new AWS.DynamoDB.DocumentClient();

      dbHelper.prototype.addItem = (item, location, userID) =>
      return new Promise((resolve, reject) =>
      const params =
      TableName: tableName,
      Item:
      'itemName': item,
      'Location': location,
      'userId': userID,


      ;
      docClient.put(params, (err, data) =>
      if (err)
      console.log("Unable to insert =>", JSON.stringify(err))
      return reject("Unable to insert");

      console.log("Saved Data, ", JSON.stringify(data));
      resolve(data);
      );
      );


      dbHelper.prototype.getItem = (userID) =>
      return new Promise((resolve, reject) =>
      const params =
      TableName: tableName,
      KeyConditionExpression: "#userID = :user_id",
      ExpressionAttributeNames:
      "#userID": "userId"
      "itemName": "itemName"
      ,
      ExpressionAttributeValues:
      ":user_id": userID



      docClient.query(params, (err, data) =>
      if (err)
      console.error("Unable to read item. Error JSON:", JSON.stringify(err, null, 2));
      return reject(JSON.stringify(err, null, 2))

      console.log("GetItem succeeded:", JSON.stringify(data, null, 2));
      resolve(data.Items)

      )
      );


      dbHelper.prototype.removeItem = (item, userID) =>
      return new Promise((resolve, reject) =>
      const params =
      TableName: tableName,
      Key:
      "userId": userID,
      "itemName": item
      ,
      ConditionExpression: "attribute_exists(itemName)"

      docClient.delete(params, function(err, data)
      if (err)
      console.error("Unable to delete item. Error JSON:", JSON.stringify(err, null, 2));
      return reject(JSON.stringify(err, null, 2));

      console.log(JSON.stringify(err));
      console.log("DeleteItem succeeded:", JSON.stringify(data, null, 2));
      resolve();
      )
      );
      ;

      module.exports = new dbHelper();





      /*```````````dbHelper.js`````````````*/
      var AWS = require("aws-sdk");
      AWS.config.update(
      region: "us-east-1"
      );
      const tableName = "FORGETABLE_THINGS";

      var dbHelper = function() ;
      var docClient = new AWS.DynamoDB.DocumentClient();

      dbHelper.prototype.addItem = (item, location, userID) =>
      return new Promise((resolve, reject) =>
      const params =
      TableName: tableName,
      Item:
      'itemName': item,
      'Location': location,
      'userId': userID,


      ;
      docClient.put(params, (err, data) =>
      if (err)
      console.log("Unable to insert =>", JSON.stringify(err))
      return reject("Unable to insert");

      console.log("Saved Data, ", JSON.stringify(data));
      resolve(data);
      );
      );


      dbHelper.prototype.getItem = (userID) =>
      return new Promise((resolve, reject) =>
      const params =
      TableName: tableName,
      KeyConditionExpression: "#userID = :user_id",
      ExpressionAttributeNames:
      "#userID": "userId"
      "itemName": "itemName"
      ,
      ExpressionAttributeValues:
      ":user_id": userID



      docClient.query(params, (err, data) =>
      if (err)
      console.error("Unable to read item. Error JSON:", JSON.stringify(err, null, 2));
      return reject(JSON.stringify(err, null, 2))

      console.log("GetItem succeeded:", JSON.stringify(data, null, 2));
      resolve(data.Items)

      )
      );


      dbHelper.prototype.removeItem = (item, userID) =>
      return new Promise((resolve, reject) =>
      const params =
      TableName: tableName,
      Key:
      "userId": userID,
      "itemName": item
      ,
      ConditionExpression: "attribute_exists(itemName)"

      docClient.delete(params, function(err, data)
      if (err)
      console.error("Unable to delete item. Error JSON:", JSON.stringify(err, null, 2));
      return reject(JSON.stringify(err, null, 2));

      console.log(JSON.stringify(err));
      console.log("DeleteItem succeeded:", JSON.stringify(data, null, 2));
      resolve();
      )
      );
      ;

      module.exports = new dbHelper();






      node.js amazon-web-services amazon-dynamodb alexa-skills-kit alexa-skill






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      asked Mar 25 at 21:07









      Ady YousfAdy Yousf

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