`Is there a way to retrieve the ID of a nested collection in Firestore using HTML?`

Question

`Is there a way to retrieve the ID of a nested collection in Firestore using HTML?`

I've established a collection called "users" and within it, I have set up a subCollection named "innerGuides". While I know how to fetch data from the main collection "users", I'm curious about how to obtain the ID of my subCollection "innerGuides."

db.collection("users").doc(user.uid).collection("innerGuides").doc("BGP9O0Rh2ThiL40tXOVG").get().then(doc => {
    console.log(user.uid);
    console.log(doc.data().content);
  }).catch(error => {
    console.log(error);
  })

As you can observe, I am able to retrieve the UID of my main collection through "user.uid"; however, when it comes to the subCollection, how can I dynamically retrieve its UID? I manually entered the subCollection's UID, but I'm looking for a way to grab it automatically.

javascript firebase google-cloud-firestore

Answer 1

Answer №1

If you need to retrieve the identifier of a DocumentSnapshot, you can follow this example:

db.collection("users").doc(user.uid).collection("innerGuides").doc("BGP9O0Rh2ThiL40tXOVG").get().then(doc => {
    console.log(doc.id);  // <-- here
    console.log(doc.data().content);
  }).catch(error => {
    console.log(error);
  })

You may also check for doc.exists to verify if the document retrieved by get() actually exists.

To display your document along with its id, you could use something like this:

console.log({
  id: doc.id,
  ...doc.data(),
});

The id format for the sub-collection would be like:

users/the-user-id/innerGuides/BGP9O0Rh2ThiL40tXOVG

. It is not possible to directly extract only BGP9O0Rh2ThiL40tXOVG on its own as it requires the entire reference path for context. If you specifically need that value, you can parse it out from the id using JavaScript methods such as split():

const subId = id.split('/')[3]

It's advisable to validate the array prior to extraction, but this method should successfully fetch the id for you.

Answer 2

If you need to retrieve the identifier of a DocumentSnapshot, you can follow this example:

db.collection("users").doc(user.uid).collection("innerGuides").doc("BGP9O0Rh2ThiL40tXOVG").get().then(doc => {
    console.log(doc.id);  // <-- here
    console.log(doc.data().content);
  }).catch(error => {
    console.log(error);
  })

You may also check for doc.exists to verify if the document retrieved by get() actually exists.

To display your document along with its id, you could use something like this:

console.log({
  id: doc.id,
  ...doc.data(),
});

The id format for the sub-collection would be like:

users/the-user-id/innerGuides/BGP9O0Rh2ThiL40tXOVG

. It is not possible to directly extract only BGP9O0Rh2ThiL40tXOVG on its own as it requires the entire reference path for context. If you specifically need that value, you can parse it out from the id using JavaScript methods such as split():

const subId = id.split('/')[3]

It's advisable to validate the array prior to extraction, but this method should successfully fetch the id for you.

`Is there a way to retrieve the ID of a nested collection in Firestore using HTML?`

Answer №1

Similar questions

How can I find a user's ID in a JSON file using for...in loop in Discord.js?

Would it be better to lock a variable stored in req.session, or opt for a massive global variable instead?

Developing a proxy that routes traffic through the user's device

The issue of HandleSubmit not functioning properly when used in conjunction with vee-validate on Vue3 and V

Highcharts: Limiting the yAxis values to a maximum of two decimal places

The Elusive Solution: Why jQuery's .css() Method Fails

What is the best way to eliminate an object from an array of objects that fulfills a specific condition?

Using a single function to generate multiple instances of a table in JavaScript

Tips for validating forms using jQuery

Adjust the height of an iframe dynamically according to the content within using JQUERY/Javascript

Mistaken data retrieved from a knockout observable array

What is the best way to remove an element within another element using Jquery?

Implementing global parameters in ui-router

When attempting a POST request to the API for a JavaScript application, a 400 Bad Request error is received, unlike with an ASP

How to efficiently use nested $.each() in DataTables with jQuery

Putting retrieved data from firebase into an array using Angular and Firebase format

The CSS theme toggler for Bootstrap

Building a new Vue.JS component inside of an existing parent component

Tips for optimizing performance in Vue.js data tables when working with large datasets stored in GCP Firestore

Sending emails with SMTP in JavaScript using the mailto form