Firebase Firestore-无法获取集合中字段的值

Question

I have a Firebase Firestore defined as shown in the image

The field zaaidata is an object. I want to use the value of tot and van in a response that is sent to my chatbot in Dialogflow with a webhook.

I managed to query the document, but I am unable to retrieve the specific values. I already tried this:

• doc.data["zaaidata"]["van"]
• doc.data("zaaidata")("van")
• doc.data.get("zaaidata")["van"]

Here is my index.js

const functions = require('firebase-functions');
const admin = require('firebase-admin');

admin.initializeApp(functions.config().firebase);

var db = admin.firestore();

exports.webhook = functions.https.onRequest((req, res) => {

    let parameters = req.body.result.parameters; 
    var groentenRef = db.collection('groenten').doc(parameters.groente);

    var query = groentenRef.get()
        .then(doc => {
            if (!doc.exists) {
                response = "No such document!";
            } else {
                response = "Je kan zaaien tussen " + doc.data["zaaidata"]["van"] + " en " + doc.data["zaaidata"]["tot"];
            }
            res.setHeader('Content-Type', 'application/json'); 
            res.send(JSON.stringify({ "speech": response, "displayText": response}));
        })
        .catch(err => {
            console.log('Error getting documents', err);
        }); 
});

Can someone help me on this, please? Thanks!

Answer 1

你尝试过这个吗

response = "Je kan zaaien tussen " + doc.data().zaaidata.van + " en " + doc.data().zaaidata.tot;