Hi, I have just published a new package named tarams. It provide a simple way to define schema, parse and validate your request parameters.

• Github repo

Here is how to use Tarams

@index_params_schema  %{
    keyword: :string,
    status: [type: string, required: true],
    group_id: [type: :integer, validate: {:number, [greater_than: 0]}]
  }

def index(conn, params) do
    with {:ok, better_params} <- Tarams.parse(@index_params_schema, params) do
        IO.inspect(better_params.keyword}
        IO.inspect(better_params.status}
        IO.inspect(better_params.group_id}
        # do anything with your params
    else
        {:error, changset} -> # return params error
    end
end

Your feedback are welcome!