When setting up a new or existing Firebase Web App on a new domain (or subdomain), you may encounter errors (shown below) where most of them talk about requests being blocked by the referrer which is yoursite.com or sub.yoursite.com. Errors Errors or warnings of the following kind may be seen or observed. Firebase config instantiation […]
In the rewrites attribute of firebase.json, we can map a request URL path to a Cloud Run container to serve dynamic content. For example to direct all requests from yoursite.com/foo or PROJECT_ID.web.app/foo to a Cloud Run service (container/instance) called bar, you can put the following configuration in your firebase.json: Once you deploy firebase hosting with […]
So you want to do something like typeof var (JavaScript) In Firebase Firestore security rules? There will be times when you will want to check the type of a certain piece of data to do things like: Incoming data (input) validation. Check the type of an existing resource’s (document) data field in if condition expressions. […]
Once you spend some time working with Firebase you definitely want to know how they do authentication, especially in terms of the auth tokens or session IDs. I have previously written about where or how the relevant auth tokens are stored for Web JavaScript SDK, but this article by Jacob Wenger does an excellent job […]
I’ve been curious about where Firebase’s JavaScript SDK for web apps stores the auth tokens or session IDs to authenticate users and keep them “logged in”. Initially, I thought maybe the authentication happens via cookies but when I tried deleting all the cookies, I was still logged in as a user in my web app […]
In the previous article, we learnt everything about how to export data from Cloud Firestore into Cloud Storage and import data from Cloud Storage into Cloud Firestore (vice-versa). A very common requirement is to have backup and restore operations scheduled to run at regular intervals. For instance backup the entire database daily without any manual […]
Firebase comes with a managed data export and import service for Cloud Firestore that allows us to backup the Firestore database into Cloud Storage and restore from a previously exported backup. This is an extremely important operation for various reasons like: You should always backup your data at regular intervals, as a good practise. Backups […]
Cloud Firestore DB (offered by Firebase) supports subcollections that allows you to create “child” collections associated with a specific document. So for instance, a posts collection may have a bunch of post documents with each of them can having a comments subcollection, alongside its own fields. Referring to each post and comment document is no […]
In Firebase’s Firestore database, you may want to query and get all the documents in a collection that either contains a specific field (or key) or does not contain a specific field (or key). By contain, I mean all the documents where a specific field either exists, or doesn’t exists. Query and get all documents […]
There’s a question often asked within development teams – what branch and/or commit ID is deployed on production (or staging) environment ? Firebase doesn’t let us answer that in any built-in or straightforward way. In some cases it might be a requirement to answer this question, primarily for services like firebase functions and firebase hosting. […]