Macros to create proxy functions to commands and queries in a module.

Examples

defmodule Users do
  use Cqrs.BoundedContext

  command CreateUser
  command CreateUser, as: :create_user2

  query GetUser
  query GetUser, as: :get_user2
end

Commands

iex> {:error, {:invalid_command, state}} =
...> Users.create_user(name: "chris", email: "wrong")
...> state.errors
%{email: ["has invalid format"]}

iex> {:error, {:invalid_command, state}} =
...> Users.create_user2(name: "chris", email: "wrong")
...> state.errors
%{email: ["has invalid format"]}

iex> Users.create_user(name: "chris", email: "chris@example.com")
{:ok, :dispatched}

iex> Users.create_user2(name: "chris", email: "chris@example.com")
{:ok, :dispatched}

Queries

iex> Users.get_user!()
** (Cqrs.Query.QueryError) %{email: ["can't be blank"]}

iex> Users.get_user2!()
** (Cqrs.Query.QueryError) %{email: ["can't be blank"]}

iex> Users.get_user!(email: "wrong")
** (Cqrs.Query.QueryError) %{email: ["has invalid format"]}

iex> {:error, %{errors: errors}} = Users.get_user()
...> errors
[email: {"can't be blank", [validation: :required]}]

iex> {:error, %{errors: errors}} = Users.get_user(email: "wrong")
...> errors
[email: {"has invalid format", [validation: :format]}]

iex> {:ok, query} = Users.get_user_query(email: "chris@example.com")
...> query
#Ecto.Query<from u0 in User, where: u0.email == ^"chris@example.com">

iex> {:ok, user} = Users.get_user(email: "chris@example.com")
...> %{id: user.id, email: user.email}
%{id: "052c1984-74c9-522f-858f-f04f1d4cc786", email: "chris@example.com"}