Validate number of places being a positive integer

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/graphql/helpers/error.ex

@@ -2,24 +2,44 @@ defmodule Mobilizon.GraphQL.Helpers.Error do
   @moduledoc """
   Helper functions for Mobilizon.GraphQL
   """
+  alias Ecto.Changeset
 
   def handle_errors(fun) do
     fn source, args, info ->
       case Absinthe.Resolution.call(fun, source, args, info) do
-        {:error, %Ecto.Changeset{} = changeset} -> format_changeset(changeset)
-        val -> val
+        {:error, %Changeset{} = changeset} ->
+          format_changeset(changeset)
+
+        {:error, _, %Changeset{} = changeset} ->
+          format_changeset(changeset)
+
+        val ->
+          val
       end
     end
   end
 
-  def format_changeset(changeset) do
+  def format_changeset(%Changeset{changes: changes} = changeset) do
     # {:error, [email: {"has already been taken", []}]}
+
     errors =
-      changeset.errors
-      |> Enum.map(fn {key, {value, _context}} ->
-        [message: "#{value}", details: key]
+      Enum.reduce(changes, [], fn {_key, value}, acc ->
+        case value do
+          %Changeset{} ->
+            {:error, errors} = format_changeset(value)
+            acc ++ errors
+
+          _ ->
+            acc
+        end
       end)
 
+    errors = errors ++ Enum.map(changeset.errors, &transform_error/1)
+
     {:error, errors}
   end
+
+  defp transform_error({key, {value, _context}}) do
+    [message: "#{value}", details: key]
+  end
 end