Elixact is a schema definition and validation library for Elixir.

It provides a DSL for defining schemas with rich metadata, validation rules, and JSON Schema generation capabilities.

Example

defmodule UserSchema do
  use Elixact

  schema "User account information" do
    field :name, :string do
      description "User's full name"
      example "John Doe"
      required true
      min_length 2
    end

    field :age, :integer do
      description "User's age in years"
      optional true
      gt 0
      lt 150
    end

    field :email, Types.Email do
      description "User's email address"
      required true
    end

    config do
      title "User Schema"
      strict true
    end
  end
end

The schema can then be used for validation and JSON Schema generation:

# Validation
{:ok, user} = UserSchema.validate(%{
  name: "John Doe",
  email: "john@example.com",
  age: 30
})

# JSON Schema generation
json_schema = UserSchema.json_schema()