Build your own search query builder. Something similar to the advanced demo of Ransack http://ransack-demo.herokuapp.com/users/advanced_search

Deploy to AWS (elastic beanstalk)

I would love to see an article comparing the pros and cons of client side image upload to S3 (i.e. jquery-file-upload) and server side image upload with some like Active Storage. I've heard that the client-side solution is better, but I don't know if that's actually true.

Add rating to users.
How to allow one user rate another user (using integer from 0 to 10) being all the same class (User).

Mobile apps with Ruby on Rails

VUE + UPLOAD FILE

Rails with Apache Kafka

Event Sourcing with Rails

Sometime deploy could result in system failure without one noticing.Is there any change to rollback to previous version by clicking a button?

Crypto comparison site with extra watching tools!

Design patterns in Ruby with real world examples, will be a great topic. Also JRuby apps and deployment with Docker will be amazing.

Data Structures and Design Patterns in Rails.

The exact same Trello Clone project in React so we can see how the two compare...would be awesome.

Please can you do an episode on Rails interacting Google Drive and Microsoft One Drive especially the OAuth Authentication and concepts around it

Link previewer, potentially with help from Stimulus.
Imagine some kind of chat application, when pasting a URL, it should return inline a preview of the link including a screenshot of the page

Hey Chris,
Database backup management.

It would be great to get a course on best practices for managing database data. I've read the heroku db backups but i feel like I need a better understanding of where I should keep these backups and how to keep dev / production data in sync.

Pattate

This gems makes it easy to do queries with conditions on the associations of the model
https://github.com/MaxLap/activerecord_where_assoc

scopes

Create an Invoice App Or Gem