Domain errors represent error conditions within a problem domain or bounded context.

Domain errors are business process violations, dataa consistency errors, or other errors in the problem domain. Therefore, domain errors should have a meaningful name within a particular context, and the precise meaning of that name should be part of the Ubiquitous Language of the context.

Domain errors can be defined by creating an Elixir module that uses the Errata.DomainError module. Error types defined in this way are Errata.Error types of kind :domain. As such, they share the common structure of all Errata error types and support all of the callbacks defined by the Errata.Error behaviour.

See the module docs for Errata.Error for more details.

Usage

To define a new custom domain error type, use/2 the Errata.DomainError module in your own error module:

defmodule MyApp.SomeContext.SomeError do
  use Errata.DomainError,
    default_message: "something isn't right in this context"
endcopy