Improve template documentation

lib/dynamo/view.ex

@@ -1,5 +1,19 @@
 defmodule Dynamo.View do
-  defrecord Template, identifier: nil, format: nil, handler: nil, source: nil, ref: nil, updated_at: nil
+  defrecord Template, key: nil, identifier: nil, format: nil,
+      handler: nil, source: nil, updated_at: nil, ref: nil do
+    @moduledoc """
+    The template record is responsible to keep information about
+    templates to be rendered. It contains:
+
+    * `:key` - The key used to find the template
+    * `:identifier` - An unique identifier for the template, like its filesystem path
+    * `:format` - The template format
+    * `:handler` - The handler responsible for compiling the template
+    * `:source` - The template source code
+    * `:updated_at` - The last time the template was updated
+    * `:ref` - A reference for already compiled templates
+    """
+  end
 
   defexception TemplateNotFound, query: nil, view_paths: nil do
     def message(exception) do

lib/dynamo/view/finder.ex

@@ -44,6 +44,7 @@ defmodule Dynamo.View.PathFinder do
 
     if tmpl do
       Dynamo.View.Template[
+        key: template,
         updated_at: File.stat!(tmpl).mtime,
         identifier: tmpl,
         handler: extname(tmpl),

test/dynamo/view/finder_test.exs

@@ -9,7 +9,7 @@ defmodule Dynamo.View.PathFinderTest do
   test "finds available template" do
     path = File.join(@view_path, "hello.html.eex")
 
-    assert Dynamo.View.Template[identifier: ^path,
+    assert Dynamo.View.Template[identifier: ^path, key: "hello.html",
       handler: "eex", format: "html"] = @finder.find "hello.html"
   end