Active Record
ELI5 — The Vibe Check
Active Record is an ORM pattern where each database row becomes an object that knows how to save itself. The User object doesn't just hold data — it can also call user.save() or user.delete() directly. The data and the database logic live in the same object.
Real Talk
Active Record is an ORM pattern where models directly correspond to database tables and instances represent rows. The model contains both data and database access methods. It's the foundational pattern in Rails and is used in many other frameworks.
Show Me The Code
// Rails Active Record
user = User.find(1)
user.name = 'Alice'
user.save
User.where(active: true).order(:created_at)
When You'll Hear This
"Rails uses Active Record for all database operations." / "Just call .save() on the model instance."
Related Terms
Migration
A migration is a versioned script that modifies your database schema — adding a column, creating a table, changing a type.
Model
A model is the trained AI — the finished product.
ORM (Object-Relational Mapper)
An ORM is like a translator between your code and your database. Instead of writing scary SQL, you just write normal code like `User.
Query Builder
A query builder lets you build database queries by chaining methods instead of writing raw SQL. It's like assembling a sentence with Lego blocks — `.