# Crudry
[](https://coveralls.io/github/jungsoft/crudry?branch=master)
Crudry is an elixir library for DRYing CRUD of Phoenix Contexts and Absinthe Resolvers.
It also provides a simple middleware for translating changeset errors into readable messages.
Documentation can be found at [https://hexdocs.pm/crudry](https://hexdocs.pm/crudry).
The changelog can be found at the [Releases page](https://github.com/jungsoft/crudry/releases).
## Installation
The package can be installed by adding `crudry` to your list of dependencies in `mix.exs`:
```elixir
def deps do
[
{:crudry, "~> 2.3.1"},
]
end
```
## Usage
### Context Generation
To generate CRUD functions for a given schema in your context, simply do:
```elixir
defmodule MyApp.MyContext do
alias MyApp.Repo
require Crudry.Context
Crudry.Context.generate_functions MyApp.MySchema
end
```
To see the functions that are generated and custom options, refer to the [Crudry.Context docs](https://hexdocs.pm/crudry/Crudry.Context.html#module-usage).
### Resolver Generation
With the context all set up, the resolver is ready to be generated:
```elixir
defmodule MyApp.MyResolver do
alias MyApp.Repo
require Crudry.Resolver
Crudry.Resolver.generate_functions MyApp.MyContext, MyApp.MySchema
end
```
To see the functions that are generated and custom options, refer to the [Crudry.Resolver docs](https://hexdocs.pm/crudry/Crudry.Resolver.html#module-usage).
### Translate Errors middleware
Absinthe Middleware to translate errors and changeset errors into human readable messages. It support nested changeset errors and internationalization, using [Gettext](https://github.com/elixir-lang/gettext).
To handle errors for a field, add it after the resolve, using [`middleware/2`](https://hexdocs.pm/absinthe/Absinthe.Middleware.html#module-the-middleware-2-macro):
```elixir
alias Crudry.Middlewares.TranslateErrors
field :create_user, :user do
arg :params, non_null(:user_params)
resolve &UsersResolver.create_user/2
middleware TranslateErrors
end
```
To handle errors for all fields, use [middleware/3](https://hexdocs.pm/absinthe/Absinthe.Middleware.html#module-object-wide-authentication):
```elixir
alias Crudry.Middlewares.TranslateErrors
def middleware(middleware, _field, _object) do
middleware ++ [TranslateErrors]
end
```
`Cudry.Translator` is used by default to translate error messages to the default locale `en`. You can also use your own Gettext module by adding it to your Absinthe's schema `context/1` function:
```elixir
def context(context) do
Map.put(context, :translator, MyAppWeb.Gettext)
end
```
Or just override the default locale in your [Context Plug](https://hexdocs.pm/absinthe/context-and-authentication.html#context-and-plugs):
```elixir
def call(conn, _) do
Absinthe.Plug.put_options(conn, context: %{locale: "pt_BR"})
end
```
Refer to the [TranslateErrors docs](https://hexdocs.pm/crudry/Crudry.Middlewares.TranslateErrors.html) for more information.
## Related Projects
* [Rajska](https://github.com/jungsoft/rajska) is an elixir authorization library for Absinthe.
* [Uploadex](https://github.com/jungsoft/uploadex) is an elixir library for handling uploads using Ecto and Arc
## License
MIT License.
See [LICENSE](./LICENSE) for more information.
