Use collections.abc.Iterable instead of collections.Iterable

The latter is going to be removed after Python 3.8

localized_fields/value.py

@@ -1,7 +1,8 @@
 import deprecation
-import collections
 
 from typing import Optional
+from collections.abc import Iterable
+
 from django.conf import settings
 from django.utils import translation
 
@@ -97,7 +98,7 @@ class LocalizedValue(dict):
                 lang_value = value.get(lang_code, self.default_value)
                 self.set(lang_code, lang_value)
 
-        elif isinstance(value, collections.Iterable):
+        elif isinstance(value, Iterable):
             for val in value:
                 self._interpret_value(val)
 

requirements/base.txt

@@ -1,2 +1,2 @@
-django-postgres-extra==1.21a9
+django-postgres-extra==1.22
 deprecation==2.0.3

settings.py

@@ -24,10 +24,33 @@ INSTALLED_APPS = (
     'django.contrib.auth',
     'django.contrib.contenttypes',
     'django.contrib.admin',
+    'django.contrib.messages',
     'localized_fields',
     'tests',
 )
 
+TEMPLATES = [
+    {
+        "BACKEND": "django.template.backends.django.DjangoTemplates",
+        "DIRS": [],
+        "APP_DIRS": True,
+        "OPTIONS": {
+            "context_processors": [
+                "django.template.context_processors.debug",
+                "django.template.context_processors.request",
+                "django.contrib.auth.context_processors.auth",
+                "django.contrib.messages.context_processors.messages",
+            ],
+        },
+    },
+]
+
+MIDDLEWARE = [
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+]
+
 # set to a lower number than the default, since
 # we want the tests to be fast, default is 100
 LOCALIZED_FIELDS_MAX_RETRIES = 3