Adding Google Cloud Machine Learning capabilities to a web application — In this article, I will demonstrate how you can quickly develop a web application that “OCRises” an image and translates the resulting text by mixing and matching different Firebase and Google Cloud services: Cloud Functions, Firebase Extensions and Vision API. Also, I will show how the core business logic of…

With Cloud Firestore, we can combine multiple where() methods to create logical AND queries. These queries are called compound queries in the documentation. However, as indicated in the documentation (Section “Query Limitations”): Cloud Firestore does not support the following types of queries: - … - Logical OR queries. In this case, you…

I often see some questions on StackOverflow on how to define the CollectionReference corresponding to a subcollection, when using the JavaScript SDK Version 9. IMO, the main reason for questions on this subject is that the official Firebase documentation does not show any example (at the time of writing this…

I’ve just answered an interesting question on Stack Overflow that we can summarized as follows: We have a Firestore collection named docs. For each document of this collection, the read access right shall be granted to specific users group, depending on the document. The users groups shall be defined in…

Quite often in a application you need to aggregate data and order the results of this aggregation. For example, let’s imagine a Restaurant Reviews App where you want to display the Top 3 restaurants in terms of number of reviews. In the SQL world, this is quite easy to accomplish…

TL;DR: In this article we share and explain the code for building a module which allows Firebase end-users with a specific Admin role creating other users and assigning them other specific user roles. This solution can be applied to Web, Android, iOS and Flutter apps built with Firebase. Most applications…

As detailed in the Cloud Firestore documentation, data in Firestore is stored into documents, which are “organized into collections”. Documents can contain subcollections which, in turn, can contains documents. The documentation also indicates that: Documents in subcollections can contain subcollections as well, allowing you to further nest data. You can…