How to query firestore with the Dialogflow inline editor to get information - google-cloud-firestore

Question

I am using the inline editor within Dialogflow with the aim of making queries to the database I have created within Firestore.
In short, the user requests a list of courses, I'd like the chatbot to then grab that information form the db and display that back to the user.
Below I have tried to create a function that will do this, I want to take the user input, say "Art Courses" and have my db return those results.
So far, I have created a function that is triggered when the intent is matched, like so;
function getCourses(agent){
let courseRequest = agent.parameters.courseRequest;
if (getCourses){
console.log('Here is the list you requested for ${getCourses}' + parameters.courseRequest);
return admin.firestore().collection('Course_Information').doc.where('CoureTypes').get();
}
}
Are there any notable things I need to add to my function to perform what I wish to achieve?
Thank you.
UPDATE
This code deploys fine, but when I communicate with my bot and trigger the CourseEnquiry intent, cloud Functions shows this error:
admin.collection is not a function
Whilst this seems self explanatory I can't make sure of what it means, I thought declaring const admin = require('firebase-admin');enables me to use admin.collection
// See https://github.com/dialogflow/dialogflow-fulfillment-nodejs
// for Dialogflow fulfillment library docs, samples, and to report issues
'use strict';
const functions = require('firebase-functions');
const {WebhookClient} = require('dialogflow-fulfillment');
const {Card, Suggestion} = require('dialogflow-fulfillment');
const admin = require('firebase-admin');
process.env.DEBUG = 'dialogflow:debug'; // enables lib debugging statements
exports.dialogflowFirebaseFulfillment = functions.https.onRequest((request, response) => {
const agent = new WebhookClient({ request, response });
console.log('Dialogflow Request headers: ' + JSON.stringify(request.headers));
console.log('Dialogflow Request body: ' + JSON.stringify(request.body));
function getDate(agent){
var today = new Date();
}
function welcome(agent) {
agent.add(`Welcome to my agent!`);
}
function test(agent){
agent.add("The test is successful");
}
function getCourses(agent){
// Get the database collection and document
const getCourseDoc = admin.collection('Course_Information').doc('Course_Types');
return getCourseDoc.get()
.then(doc => {
if (!doc.exists) {
agent.add('No data found in the database!');
} else {
agent.add(doc.data().entry);
}
return Promise.resolve('Here is the information you wanted');
}).catch(() => {
agent.add('Error reading entry from the Firestore database.');
});
}
function getSubmissionDateSep(agent){
agent.add('Your next submission date is for coursework 1 is');
}
let intentMap = new Map();
intentMap.set('Default Welcome Intent', welcome);
intentMap.set('Test_Test', test);
intentMap.set('CourseEnquiry', getCourses);
intentMap.set('Submission_Dates - sept', getSubmissionDateSep);
agent.handleRequest(intentMap);
});
UPDATE #2
Hey guys, still not got anywhere with this, I have tried adding:
admin.initializeApp(functions.config().firebase);
const db = admin.firestore();
According to this document but I get this error when deploying:
The deployment of your Cloud Function failed:
Function load error: Code in file index.js can't be loaded.
Is there a syntax error in your code?
Detailed stack trace: Error: Firebase config variables are not available. Please use the latest version of the Firebase CLI to deploy this function.

Answer 1

You don't show how you're responding to the user with your results, but you'll want to make sure you handle that as part of the then() clause in a Promise. Since the get() in the firestore collection returns a Promise, and you are returning it from your function, you need to make sure that the calling function treats it as a Promise, has a then() clause, and sends back the result as part of something inside this clause.