ViewTube

Storing a user's password in plain text is a serious security mistake, and Rails gives you has_secure_password, a real, built-in ...

A system test drives a real, actual browser, clicking buttons and filling in forms exactly like a real user would, and Capybara is the ...

Stimulus is the lightweight JavaScript framework that pairs with Hotwire, adding small bits of real interactivity, like toggling a menu, ...

Not every Rails app needs to render HTML at all, sometimes it just needs to serve JSON to a mobile app or a separate JavaScript ...

RSpec is the most popular alternative testing framework in the Rails community, favored for its readable, English-like syntax.

Hotwire is Rails' modern default for building fast, dynamic pages, and Turbo Frames and Turbo Streams let you update just PART ...

Action Mailer is Rails' built-in system for sending real emails, and it works almost exactly like a controller and view, just for ...

Some tasks, sending an email, resizing an image, are too slow to make a user wait for while a page loads. Active Job is Rails' ...

Action Cable is Rails' built-in framework for WebSockets, letting your server push real, live updates to a page without the user ever ...

Active Storage is Rails' built-in system for attaching real files, images, PDFs, anything, to your models, without you writing any ...

A submitted form sends a whole bag of data to your controller, but blindly trusting all of it is a real security risk, someone could ...

Some relationships are more complex than a simple has_many, like an article having many tags, and a tag belonging to many ...

HTTP itself has no memory between requests, so Rails uses sessions, a small piece of data persisted across requests, ...

Deleting a record is permanent, so Rails makes it easy to both perform the deletion and ask the user to confirm it first. In this video ...

Database structure changes over time, you'll add columns, remove them, and sometimes need to undo a migration entirely.

ActiveRecord is what turns a plain Ruby model into something that can talk to your database, no SQL required. In this video you'll ...

form_with is Rails' modern helper for generating real HTML forms, and it automatically wires up the correct URL and HTTP ...

Create and update are where user-submitted form data actually becomes a saved (or changed) database record. In this video ...

Almost every real app has related data, an article that has many comments, and a comment that belongs to one article.

Nothing stops bad data from being saved unless you explicitly tell your model to reject it, and that's exactly what validations do.