(Very) simple Phoenix error view helpers

Phoenix Error View Helpers

Automated rendering of error views based on the message field on exception structs.
This is often sufficient for simple JSON cases and pre-release HTML. It is recommended to write custom error views before production to give your users as much detail as possible in the user friendliest way that their content type allows.

# /web/views/error_view.ex
defrender :error, for: 401, do: "Not authorized"
defrender :error, for: 404, only: [:json], do: "Data not found"
defrender :error, for: 422, except: [:html] do: "Unprocessible entity"
defrender :error, for: 500, do: "Server internal error"

# Example JSON Error Response

404 %{error: "Data not found", reason: "Photo deleted"}

# Example HTML Error Response

500 "Server internal error"