Use SQL views in a Rails app without switching the schema format to SQL; Scenic adds versioned, reversible migrations and keeps view definitions in SQL files.

Runtime checks can identify the current RSpec spec type, letting shared setup run only for controller, helper, or request/response-aware examples.

Shared factory attributes and traits can be reused across FactoryBot definitions by extracting a trait and mixing it into multiple factories.

Dummy development data is faster to create by reusing FactoryBot factories than by using the UI or Rails console records. Defaults, associations, traits, and attribute overrides come along automatically.

Quick console shortcuts for changing receiver context, inspecting objects, making requests, using helpers, and querying schema in a Rails session.

Password authentication can be tested by forcing SSH to skip public key login and prefer passwords. The same options also work with scp for file copies.

Typing d in a Geordi VNC browser can switch to a grey screen; pressing d again brings the browser back.

RSpec method expectations can match arguments with any matcher, not just anything or hash_including, making loose argument checks more expressive.

Ruby 1.9 triggers UTF-8 regexp warnings in Rails 2.3.16+ from ActiveSupport; a monkey patch in config/initializers suppresses them.

Controller specs usually skip template rendering; integrate_views in RSpec 1 or render_views in RSpec 2 enables view rendering for specs that need it.

Applications that use the generic Monospace family ignore terminal font settings. A fontconfig override in ~/.fonts.conf can map it to a preferred font.

debugger is unreliable on Ruby 2; byebug provides a fast, reliable debugger for Ruby 2.0.0+ using TracePoint and Debug Inspector.

Complex regex patterns are hard to debug by inspection; visual editors highlight matches and capture groups to make validation easier.

Rails 7.1 adds Rails.env.local?; stubbing Rails.env with a plain string can fail, while ActiveSupport::EnvironmentInquirer keeps environment checks working.

Code quality determines maintainability, from merely working code to reliable, readable, and changeable code. Long-lived projects need at least readable code; short-lived code can stop at reliable code.

Cucumber::MultilineArgument::DataTable#diff! caches state, so repeated checks inside patiently do keep failing; expected_table.dup.diff! avoids the stale comparison.

Browser cookie storage is constrained by per-domain limits on count and total size, which can break login or tracking data when limits are exceeded.

Ruby can read and write CSV files with the standard CSV library, and smarter_csv makes imports more convenient when converting rows into hashes.

Local Sentry event logging helps debug error capture and background jobs without sending data to Sentry or affecting production metrics.