i18n_fields_list.

shared/multilingual/utils/__init__.py

@@ -1,5 +1,7 @@
 # Erik Stein <code@classlibrary.net>, 2017
 
+from functools import reduce, partial
+
 from collections import OrderedDict
 from django.conf import settings
 
@@ -7,5 +9,22 @@ from shared.utils.translation import lang_suffix
 
 
 def i18n_fields(field_name, languages=None):
+    """
+    Returns a list of i18n fields for a given fieldname.
+    >>> i18n_fields('title', ['en', 'de'])
+    ['title_en', 'title_de']
+    """
     return [lang_suffix(l, field_name) for l in languages or
         OrderedDict(settings.LANGUAGES).keys()]
+
+
+def i18n_fields_list(field_names, languages=None):
+    """
+    Returns i18n fields for a list of fields, i.e.
+
+    >>> search_fields = ['title', 'window_title', 'short_title']
+    >>> i18n_fields_list(search_fields, ['en', 'de'])
+    ['title_en', 'title_en', 'windowtitle_en', 'windowtitle_en', 'shorttitle_en', 'shorttitle_en', ]
+    """
+    f = partial(i18n_fields, languages=languages)
+    return reduce(lambda x, y: x + y, map(f, field_names))