Hi all,
I am learning how to create a basic API with Phoenix (I know, I do not need Phoenix, but I wanted to see how it is actually done). Everything works well but I have not been able to wrap my head around the process to filter results. For instance, my API JSON return is like this:
{
"data": {
"active": true,
"carmaker": "Simca",
"id": 1,
"owner": "James Bon",
"plate": 345671
}
}
It all goes well if I simply do:
GET /api/customers/ or GET /api/customers/1. But I want to be able to do GET /api/customers?carmaker=carmaker_name
What I have so far is:
router.ex:
defmodule NukakApiWeb.Router do
use NukakApiWeb, :router
# use Pow.Phoenix.Router
pipeline :api do
plug :accepts, ["json"]
plug NukakApiWeb.ApiAuthPlug, otp_app: :nukak_api
end
scope "/api", NukakApiWeb do
pipe_through [:api]
resources "/customers", CustomerController, only: [:show, :index]
# resources "/customers/:id", CustomerController, :show
end
end
customer_controller.ex:
defmodule NukakApiWeb.CustomerController do
use NukakApiWeb, :controller
# I know the following line should better go on a different file. Just adding it here for simplicity.
def get_customer!(id), do: Repo.get!(Customer, id)
def list_customers do
Repo.all(Customer)
end
def index(conn, _params) do
customers = list_customers()
render(conn, "index.json", customers: customers)
end
def show(conn, %{"id" => id}) do
customer = get_customer!(id)
render(conn, "show.json", customer: customer)
end
customer_view.ex:
defmodule NukakApiWeb.CustomerView do
use NukakApiWeb, :view
alias NukakApiWeb.CustomerView
def render("index.json", %{customers: customers}) do
%{data: render_many(customers, CustomerView, "customer.json")}
end
def render("show.json", %{customer: customer}) do
%{data: render_one(customer, CustomerView, "customer.json")}
end
def render("customer.json", %{customer: customer}) do
%{id: customer.id,
name: customer.name,
plate: customer.plate,
carmaker: customer.carmaker,
active: customer.active}
end
end
I tried following this guy idea but I got lost in the assign() function:
def valid_filters(conn, params) do
filters = Enum.filter(conn.params, fn({k, v}) ->
Enum.member?(params, k)
end)
conn |> assign(:filters, filters)
end
There is the json_api_query_builder package but it does not seem to be compatible with ecto 3.
Anyway, if anybody can give me a hint on what is it that I have to do I would really appreciate it.
Thanks very much!
