Ecto Changesets

Master Ecto changesets to validate, cast, and transform data before database operations. This skill covers changeset creation, validation, constraints, handling associations, and advanced patterns for maintaining data integrity.

Basic Changeset

defmodule MyApp.User do
  use Ecto.Schema
  import Ecto.Changeset

  schema "users" do
    field :name, :string
    field :email, :string
    field :age, :integer