Dialogflow webhook fulfillment parameter not accessible

Question

I want to get input of a parameter in my webhook fulfillment.

Here is the my code:

const bodyParser = require('body-parser')
var request = require('request-promise-native');
const { dialogflow } = require('actions-on-google');
const assistant = dialogflow({
  clientId: "30xxxxx08407-rv9kxxxxxxxxuuq8f9ul2eg.apps.googleusercontent.com"
});


module.exports = (app) => {
  const logger = console;

assistant.intent('Sales', conv => {
 const pcode = agent.parameters['PCODE'];
 console.log(pcode)

    const token = '3369708919812376';
    const serviceID = '502';
    const P_STATE_CD = 'ALL';
    const P_FO_CD = 'ALL';
    const P_DISTT_CD = 'ALL';
    const P_DATE = '16/12/2019';
    const P_PRD_GROUP = 'UREA';
    const P_PERSONAL_NO = '106296';

        var data = {"token" : token,"serviceID" : serviceID,"P_STATE_CD" : P_STATE_CD,"P_FO_CD" : P_FO_CD,"P_DISTT_CD" : P_DISTT_CD,"P_DATE" : P_DATE,"P_PRD_GROUP" : P_PRD_GROUP,"P_PERSONAL_NO" : P_PERSONAL_NO };
        var sdata = JSON.stringify(data);

                    const options = {
                        method: 'POST',
                        uri: 'http://Webservice/resources/webservice/service' ,
                        body: JSON.parse(sdata) ,
                        json: true
                    }
        return request(options)
            .then( body => {
                 var unit = body
                 console.log(body)
                 unit.intent = "Sales"
                 unit.value1 = unit.saleInfo[0].QMTD
                 unit.value2 = unit.saleInfo[0].QYTD
                 unit.value3 = unit.saleInfo[0].O_UOM
                 unit.value4 = null
                 unit.value5 = null

                 delete unit.saleInfo
                 var unit2 = JSON.stringify(unit)
                console.log(unit2)
          conv.ask(unit2);
              })
              .catch( err => {
               console.error( err );
               conv.ask('Something went wrong. What should I do now?');
                 });
  })

I tried with const pcode = agent.parameters.PCODE but it is not working. Giving me error:

ReferenceError: agent is not defined at assistant.intent.conv (/home/dbalounge/GoogleDF/service.js:15:16) at Function. (/home/dbalounge/GoogleDF/node_modules/actions-on-google/dist/service/dialogflow/dialogflow.js:151:27) at Generator.next () at /home/dbalounge/GoogleDF/node_modules/actions-on-google/dist/service/dialogflow/dialogflow.js:22:71 at new Promise () at __awaiter (/home/dbalounge/GoogleDF/node_modules/actions-on-google/dist/service/dialogflow/dialogflow.js:18:12) at Function.handler (/home/dbalounge/GoogleDF/node_modules/actions-on-google/dist/service/dialogflow/dialogflow.js:85:16) at Object. (/home/dbalounge/GoogleDF/node_modules/actions-on-google/dist/assistant.js:55:32) at Generator.next () at /home/dbalounge/GoogleDF/node_modules/actions-on-google/dist/assistant.js:22:71

Answer 1

agent is not defined anywhere in your code, that's why you're getting:

ReferenceError: agent is not defined

In any case if you use assistant.parameters won't work either. Dialogflow intent parameters can be accessed through the second argument of .intent callback.

assistant.intent('Sales', (conv, params) => {
     const pcode = params.PCODE;
     /* ... */
})

For more info you can check the docs