From the archives…

• Express yourself clearly with positive? and negative? for numbers
• Play in a sandbox in production
• Beware of <%== in your erb files
• Really, Really, Really Don’t Interpolate Strings into Active Record Methods
• Assign a default value to an attribute in Active Record
• Consider find_each for looping through Active Record associations
• Try not to loop through associations inside jobs
• Only use locals in view partials
• Find out what callbacks are defined on an Active Record model in the console
• Safely Remove a Column from an Active Record Model
• Use zero? for comparison of numerics like Integer, Float and BigDecimal
• Time Ranges are Clearer When Querying Databases
• Time extensions are an unsung hero of Active Support
• Use before? and after? Methods When Comparing Dates and Times in Rails
• The Mrs Triggs Problem
• Know what your scopes are doing: where.first vs find_by
• Software & Infrastructure we use to Run Our SaaS
• Enqueue Jobs Quickly with Sidekiq’s Bulk Features
• Tidy Up Your Routes with Only
• Don't Use Floats and Use the Ruby Money Gem to Represent Currencies
• Use Sidekiq Directly, Not Through Active Job
• Use compact_blank to remove empty strings from Arrays and Hashes
• Compress Your HTML Responses
• Don’t call a new version of something ”new” when refactoring
• Calculate the standard deviation of a Ruby array
• Calculate the mode & median averages of a Ruby array
• Opt out of Google’s FLoC User Tracking on Netlify
• Opt out of Google’s FLoC User Tracking in Rails
• Wrap your environment variables in a settings object
• Order by created_at and updated_at with scopes and a concern
• Do not use .all without pagination or a .limit
• Be specific when defining your routes
• Turn off the bits of Rails you don't use
• Use Rails URL helpers outside views and controllers
• Use Enhanced Memoization for false/nil with defined?
• Convert a two character ISO country code to an emoji flag
• Memoize Expensive Code
• Read the .ruby-version into your Gemfile
• Alt:BrightonRuby: An Online Ruby Conference — June/July 2020
• ‘Fix’ first & last by explicitly setting implicit ordering
• All Your Mailer Views in One Place
• Calculate a mean average from a Ruby array
• Be Suspicious of Join Tables
• Use Loose Ruby Versioning in Your Gemfile
• Ensure you correctly build your caching keys
• Write One Test
• Use GitHub Actions for Rails CI with Postgres
• Use Active Support in Rails for deprecation messages
• A Active Model validator for Stripe Ids
• Use a custom validator
• Clamp for min/max values
• Consider Value Objects
• Using strftime in a Rails view is probably a mistake
• Don’t Email From Active Record Callbacks
• Watch Out For nil in Ranges
• Be Aware of nil values when using where.not()
• Prevent Links in Text Fields to Foil Spammers
• Protect your sign up form with Rack::Attack
• Clean up broken .dev domains
• Don't use instance variables in partials
• Secure Your Rails Staging Environment with HTTP Basic Authentication
• Be Careful Assigning to has_one Relations
• Replace Timecop With Rails’ Time Helpers in RSpec
• Use Multiple Migrations When Adding Database Constraints
• Always Force Booleans to be True or False
• Write long strings with wiggly HEREDOCs
• A scope should return a scope
• Don’t Loop & Do Work in Jobs
• Using pluck can save a bunch of memory
• Careful with present? when using ActiveRecord scopes
• Use the presence method
• Delegate to simplify your code
• Ignore PHP bots with Rack::Attack
• Use beginning and end of string in regular expressions
• Active Record’s first and last may not mean what you think
• A job should know whether to run itself
• Use Hash#fetch when using Rails params in controllers
• Stop robots and crawlers causing errors in your Rails application
• Check Your Database Indexes For ActiveRecord Scopes
• Only use named scopes outside models
• Avoid Writing SQL When Using ActiveRelation
• Enumerable avoids using temporary variables when looping
• Extract conditionals into well-named methods
• Be sparing when using unless
• Truthiness in Conditionals
• Set your page title in the view template using content_for
• Choose UUIDs for model IDs in Rails
• Use a pull request template
• Use simplecov in your Rails test suite
• Rescue specific errors. Avoid rescuing StandardError. Don’t rescue Exception.
• Don’t use default_scope. Ever.
• Use Rails’ naming conventions for dates & times
• Rails Naming Cringes
• AMP Project Pages on Ruby on Rails
• Simple Ruby/Rails Setup on macOS
• Benchmarking each_with_object Against inject when building Hashes from Arrays
• Serving a Jekyll Blog using Heroku
• Web Services used at ImpulseFlyer
• RedDotRubyConf 2012: Wrap up