# `DDD.Repository`
[🔗](https://github.com/blackuprise/vicander/blob/v0.1.1/lib/ddd/persistence/repository.ex#L1)

Port (interface) for DDD Repositories.

Declares base callbacks and domain-specific queries via `find_by`.
The infrastructure layer provides the concrete Ecto adapter.

## Usage

    defmodule MyApp.OrderRepository do
      use DDD.Repository

      repo MyApp.Order do
        find_by :customer_id
        find_by :status
        find_by [:customer_id, :status]
      end
    end

Generated callbacks:
    find_by_id/1
    save/1
    delete/1
    find_by_customer_id/1
    find_by_status/1
    find_by_customer_id_and_status/2

# `delete`

```elixir
@callback delete(aggregate :: struct()) :: :ok | {:error, any()}
```

# `find_by_id`

```elixir
@callback find_by_id(id :: any()) :: {:ok, struct()} | {:error, :not_found}
```

# `save`

```elixir
@callback save(aggregate :: struct()) :: {:ok, struct()} | {:error, any()}
```

# `find_by`
*macro* 

# `repo`
*macro* 

---

*Consult [api-reference.md](api-reference.md) for complete listing*