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SPEAKER: Kasper Timm Hansen
Speaker Bio: Kasper is an independent Rails
consultant with a strong focus on clear naming and
Domain Modeling. He used to be on the Rails core
team where he reviewed & merged over 1000
contributor PRs. Kasper is still involved in Open
Source with his own gems that take Rails further and
he’s contracted for Bullet Train too, so he’s more than
happy to talk about that work.
He’s also developing a new software development
technique called Riffing, that he’s amped to see how
it could fit and level up you and your team’s process.
ROOM: 140 E-G
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Riffing on
Rails
Sketch your way to better
designed code
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Hi, it's Kasper
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Today let's talk about code
design
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Figuring out
the names, responsibilities,
and relationships
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How do we
get better
designs?
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I don't actually know.
Sorry.
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Better design requires a
process
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How this
came about
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Overwhelmed
→ Anxious
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"I just want to
ship"
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My way out
with riffing
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Our meal plan
what riffing is
1.
benefits
2.
obstacles
3.
demo
4.
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Non compete
Just one more tool in your toolbox
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how it works
- use a single Ruby file
- lean on conventions as much as possible
- use near runnable code
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we're aiming to
- learn about the problem
- surface unknowns
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Sessions are
usually ~40-60min
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we do a
Lil' Demo
as a treat
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# Users can favorite other objects in our system
class User
has_many :favorites
def favorite(record) = favorites.create!(record:)
end
class User::Favorite
belongs_to :user
belongs_to :record, polymorphic: true
end
class Users::FavoritesController
def create
Current.user.favorite SignedGlobalID.find(params[:id],
only: [Post, Comment], for: :user_favorites)
end
end
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Riffing
Benefits
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Fewer sunk costs
Low Friction
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Compare
Alternatives
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more XP per
feature
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Embody the
problem
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Get things out
of my head
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Negative
Emotions
are now really useful
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Riffing
Obstacles
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You need to
know some
APIs
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A blank file
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Uhh, no tests
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Getting stuck
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When in
doubt,
experiment
more
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Let's riff
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Wrap up
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Receipts
~6 hours from live sessions
youtube.com/@kaspth-final1-psd
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How you can start to riff
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Pick out UI you like
ex. Overcast settings, GitHub sponsors
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Start with a coworker
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Team leads
write up a prompt
–
ask team to riff for 30 min
–
compare
–
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Cheap to run
so it's never a loss
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One more thing: make it executable
require "bundler/inline"; gemfile do
gem "activerecord", require: "active_record"
gem "sqlite3"
end
ActiveRecord::Base.establish_connection adapter: "sqlite3", database: ":memory:"
ActiveRecord::Base.logger = Logger.new STDOUT
ActiveRecord::Schema.define do
create_table :users
create_table :posts do |t|
t.references :user, null: false, index: true
t.string :title, null: false
end
end
class User < ActiveRecord::Base
has_many :posts
end
class Post < ActiveRecord::Base
belongs_to :user
end
user = User.create!
post = Post.create! user:, title: "First"
binding.irb
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Hack Day
10am-noon
Oaken
2pm-4pm
We riff on your thing
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Taking Rails further
active_record-
associated_object
active_job-
performs
…
active_record-
ingress
action_controller-
stashed_redirects
Bullet Train
nice_partials
showcase-rails
Experimental
brb-templates
hercule-poro
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Work
with me
→→→
[email protected]
github.com/kaspth
twitter.com/kaspth
ruby.social/@kaspth