codesnips

patterns

ruby 
class PopularPostsQuery
  def initialize(relation = Post.all)
    @relation = relation
  end

  def call(timeframe: 7.days, min_views: 100, limit: 20)

Query objects for complex ActiveRecord queries

rails activerecord patterns
by Alex Kumar 2 tabs
sql 
-- Pattern: Single Table Inheritance (STI)
CREATE TABLE users (
  id SERIAL PRIMARY KEY,
  type VARCHAR(50) NOT NULL, -- 'admin', 'customer', 'vendor'
  username VARCHAR(100) UNIQUE NOT NULL,
  email VARCHAR(100) UNIQUE NOT NULL,

Database design patterns and anti-patterns

database-design patterns anti-patterns
by Maria Garcia 2 tabs
rust 
struct Locked;
struct Unlocked;

struct Door<State> {
    _state: std::marker::PhantomData<State>,
}

Type state pattern for compile-time state machines

rust patterns type-safety
by Marcus Chen 1 tab
ruby 
class CircuitBreaker
  class CircuitOpenError < StandardError; end

  def initialize(name, redis: Redis.current, failure_threshold: 5, failure_window: 60, cooldown: 30)
    @key = "circuit:#{name}"
    @redis = redis

Service-Level “Circuit Breaker” (Simple)

rails reliability http
by codesnips 3 tabs