wip: Play with :xmerl_xpath

lib/uof_feed/model/outcome.ex

@@ -1,21 +1,29 @@
 defmodule UofFeed.Model.Outcome do
   require DataSchema
 
-  #{:outcome, [ id: ~c"12s", odds: ~c"4.25", probabilities: ~c"0.185077449", active: ~c"1" ], []}
-
   @fields [
-    field: {:id, {:attr, :id}, {__MODULE__, :charlist_to_integer, []}}
+    field: {:id, ~c"string(@id)", {__MODULE__, :cast_id, []}}
   ]
 
   @data_accessor UofFeed.XmerlSimpleAccessor
   DataSchema.data_schema @fields
 
+  ## If we wanted to use `DataSchema.to_struct/5`, for example to integrate with Ecto,
+  ## it'd be handy to have the fields accessible.
   def fields, do: @fields
 
-  def charlist_to_integer(clist) do
+  def cast_id({:xmlObj, :string, clist}), do: cast_id(clist)
+  def cast_id(clist) when is_list(clist) do
     case :string.to_integer(clist) do
       {int, []} -> {:ok, int}
+      {:error, :badarg} -> {:error, {:badarg, clist}}
       {_, leftover} -> {:error, {:leftover, leftover}}
     end
   end
+
+  def test do
+    o_simple = {:outcome, [ id: ~c"12", odds: ~c"4.25", probabilities: ~c"0.185077449", active: ~c"1" ], []}
+    o = o_simple |> :xmerl_lib.normalize_element()
+    DataSchema.to_struct(o, UofFeed.Model.Outcome)
+  end
 end

lib/uof_feed/xmerl_simple_accessor.ex

@@ -2,8 +2,8 @@ defmodule UofFeed.XmerlSimpleAccessor do
   @behaviour DataSchema.DataAccessBehaviour
 
   @impl true
-  def field({_, attrs, _} = _data, {:attr, attr}) do
-    attrs[attr]
+  def field(element = _data, xpath) do
+    :xmerl_xpath.string(xpath, element)
   end
 
   @impl true