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All ActiveRecord Episodes

9:44
How to Test Validations in Rails
#310 ·

Learn how to write tests for validations on ActiveRecord objects in Ruby on Rails
26 2
14:25
How to use Multiple Databases in Rails 6.0
#309 ·

With Rails 6.0, you can now define multiple primary and replica databases, define separate migrations for each primary database, and configure each model to read and write from different databases.
13 1
10:17
Handle Race Conditions with Pessimistic Locking
#308 · Pro

Race conditions can cause problems with data integrity. We can prevent these issues with Pessimistic Locking in ActiveRecord which uses database row-level locking.
8 0
10:54
Preventing Conflicts with Optimistic Locking
#307 · Pro

When things (users, jobs, etc) attempt to update the same record at the same time, we can often lose changes. Optimistic locking uses a lock version number to warn you about updating stale objects so you can handle that safely.
15 1
20:25
@mentions for Users with ActionText in Rails 6
#288 ·

Mentioning Users with an @mention is a super common feature. Trix and ActionText are now part of Rails 6 which means we can very easily add support for tagging users with @mentions and other custom attachments in your applications.
24 9
23:39
Dynamic Nested Forms with Stimulus JS
#283 · Pro

Don't like Cocoon or it's jQuery dependency? We can use Stimulus JS and build dynamic nested forms in Rails with accepts_nested_attributes_for from scratch pretty easily!
55 24
11:01
Autosave Draft Records - Part 2
#282 · Pro

Creating draft records in your database can be tricky. We'll be using the Draftsman gem to help us create draft versions of our records with our autosave Javascript
9 0
17:20
Autosave Draft Records - Part 1
#281 · Pro

Autosaving draft records allows you to make sure users don't lose their work and can easily write draft content without publishing right away. We'll be using Stimulus to build an autosave controller for our form and Draftsman to power the backend.
23 2
10:16
Handling First & Last Name with the name_of_person gem
#267 ·

Deciding whether or not to have separate first and last name fields gets a bit confusing. Basecamp's recently released name_of_person gem shows you exactly how to handle this reliably and also stands as a fantastic example of how to build a concern
21 4
17:32
Reddit style comment thread pagination
#266 · Pro

Adding pagination to our nested comment threads is easier than you might think, plus we'll take a look at a couple different approaches we can use
13 2
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