If the choices are Proxy str (i18n) patched_display_for_field gets an error

Author: goinnn

README.rst

@@ -261,7 +261,7 @@ This code is inspired by django code. It is possible that for other versions of
         if isinstance(field, MultiSelectField) and getattr(field, "flatchoices", None):
             try:
                 flatchoices = dict(field.flatchoices)
-                return ', '.join([flatchoices.get(v, empty_value_display) for v in value]) or empty_value_display
+                return ', '.join([str(flatchoices.get(v, empty_value_display)) for v in value]) or empty_value_display
             except TypeError:
                 # Allow list-like choices.
                 flatchoices = dict(make_hashable(field.flatchoices))

example/app/apps.py

@@ -35,7 +35,7 @@ def patched_display_for_field(value, field, empty_value_display, avoid_link=Fals
     if isinstance(field, MultiSelectField) and getattr(field, "flatchoices", None):
         try:
             flatchoices = dict(field.flatchoices)
-            return ', '.join([flatchoices.get(v, empty_value_display) for v in value]) or empty_value_display
+            return ', '.join([str(flatchoices.get(v, empty_value_display)) for v in value]) or empty_value_display
         except TypeError:
             # Allow list-like choices.
             flatchoices = dict(make_hashable(field.flatchoices))