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. […]

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 […]