Fixed #20477: Allowed list of modules for FORMAT_MODULE_PATH

Previously the FORMAT_MODULE_PATH setting only accepted one string (dotted
module path). A feature has been added to also allow a list of strings.

This is useful when using several reusable third party apps that define new
formats. We can now use them all and we can even override some of the formats
by providing a project-wide format module.

1 files changed, 23 insertions, 15 deletions

diff --git a/django/utils/formats.py b/django/utils/formats.py
index fc68179f3a..521ab5c763 100644
--- a/django/utils/formats.py
+++ b/django/utils/formats.py
@@ -46,21 +46,29 @@ def iter_format_modules(lang, format_module_path=None):
     """
     Does the heavy lifting of finding format modules.
     """
-    if check_for_language(lang):
-        format_locations = ['django.conf.locale.%s']
-        if format_module_path:
-            format_locations.append(format_module_path + '.%s')
-            format_locations.reverse()
-        locale = to_locale(lang)
-        locales = [locale]
-        if '_' in locale:
-            locales.append(locale.split('_')[0])
-        for location in format_locations:
-            for loc in locales:
-                try:
-                    yield import_module('%s.formats' % (location % loc))
-                except ImportError:
-                    pass
+    if not check_for_language(lang):
+        return
+
+    if format_module_path is None:
+        format_module_path = settings.FORMAT_MODULE_PATH
+
+    format_locations = []
+    if format_module_path:
+        if isinstance(format_module_path, six.string_types):
+            format_module_path = [format_module_path]
+        for path in format_module_path:
+            format_locations.append(path + '.%s')
+    format_locations.append('django.conf.locale.%s')
+    locale = to_locale(lang)
+    locales = [locale]
+    if '_' in locale:
+        locales.append(locale.split('_')[0])
+    for location in format_locations:
+        for loc in locales:
+            try:
+                yield import_module('%s.formats' % (location % loc))
+            except ImportError:
+                pass
 
 
 def get_format_modules(lang=None, reverse=False):