Translator.translate/2 should fall back to default locale when transl…

…ation is missing (#84)

lib/trans/translator.ex

@@ -182,7 +182,7 @@ defmodule Trans.Translator do
     end
   end
 
-  defp translate_fields(%{__struct__: module} = struct, locale, default_locale) do
+  defp translate_fields(%{__struct__: module} = struct, locale, default_locale) when is_list(locale) do
     fields = module.__trans__(:fields)
 
     Enum.reduce(fields, struct, fn field, struct ->
@@ -193,6 +193,10 @@ defmodule Trans.Translator do
     end)
   end
 
+  defp translate_fields(%{__struct__: module} = struct, locale, default_locale) do
+    translate_fields(struct, [locale], default_locale)
+  end
+
   defp translate_assocs(%{__struct__: module} = struct, locale) do
     associations = module.__schema__(:associations)
     embeds = module.__schema__(:embeds)

test/trans/translator_test.exs

@@ -44,6 +44,12 @@ defmodule Trans.TranslatorTest do
 
       assert translated.content == struct.content
     end
+
+    test "falls back to the default locale if translation does not exist", %{struct: struct} do
+      translated = Translator.translate(struct, :fr)
+
+      assert translated.content == struct.content
+    end
   end
 
   describe inspect(&Translator.translate/3) do