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Get single record from Firestore using Vue.js

I am trying to get a single record from a Firestore db where I am pulling the ID from the path but it doesn't seem to be working.

When I console log I get nothing at all in the log so not sure why the created code doesn't seem to be running

Can you see what I am doing wrong please

// Import firestorm Database
import db from '~/services/fireinit.js'
export default {
data() {
return {
post:
}
},
created() {

let ref = db.collection('post').doc(this.$route.params.id)
ref.get()
.then(snapshot => {
snapshot.forEach(doc => {
let post = doc.data()
console.log(post)
})
})
}


I should add that get all works fine

db.collection('post').get()


my console.log returns nothing even if I add a string to it so it doesn't appear this block of code is running, but I have no errors at all in the console.

1 Answer
1

By doing let ref = db.collection('post').doc(this.$route.params.id) you get a DocumentReference as detailed in the documentation here.

let ref = db.collection('post').doc(this.$route.params.id)

DocumentReference

Then by doing get() on this DocumentReference you get a DocumentSnapshot, as detailed here, and not a QuerySnapshot.

get()

DocumentReference

DocumentSnapshot

QuerySnapshot

So you should get the doc data via the data() method (or the get(<field>) to get a specific field) and not by doing snapshot.forEach(doc => {}) which should be used on a QuerySnapshot.

data()

get(<field>)

snapshot.forEach(doc => {})

QuerySnapshot

So, in other words, do as follows:

let ref = db.collection('post').doc(this.$route.params.id)
ref.get()
.then(snapshot => { //DocSnapshot
if (doc.exists) {
let post = snapshot.data()
} else {
// snapshot.data() will be undefined in this case
console.log("No such document!");
}
})


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