Migrate to django-environ

configurations/values.py

@@ -3,9 +3,11 @@
 import decimal
 import os
 import sys
+import warnings
 
 from django.core import validators
 from django.core.exceptions import ValidationError, ImproperlyConfigured
+from environ import Env
 from django.utils.module_loading import import_string
 
 from .utils import getargspec
@@ -418,8 +420,24 @@ def setup(self, name):
         return value
 
 
+def env_email_url_config(cls, url, backend=None):
+    """
+    Convert schema to consolemail in order to be compatible with old
+    console:// schema.
+
+    This could be removed and set EmailURLValue.caster to Env.email_url_config
+    directly after the deprecation is removed.
+    """
+    if url.startswith('console://'):
+        warnings.warn('Email schema console:// is deprecated. Please use '
+                      'consolemail:// in new code.',
+                      DeprecationWarning)
+        url = url.replace('console://', 'consolemail://')
+    return Env.email_url_config(url, backend=backend)
+
+
 class EmailURLValue(CastingMixin, MultipleMixin, Value):
-    caster = 'dj_email_url.parse'
+    caster = env_email_url_config
     message = 'Cannot interpret email URL value {0!r}'
     late_binding = True
 
@@ -454,21 +472,21 @@ def to_python(self, value):
 
 
 class DatabaseURLValue(DictBackendMixin, CastingMixin, Value):
-    caster = 'dj_database_url.parse'
+    caster = Env.db_url_config
     message = 'Cannot interpret database URL value {0!r}'
     environ_name = 'DATABASE_URL'
     late_binding = True
 
 
 class CacheURLValue(DictBackendMixin, CastingMixin, Value):
-    caster = 'django_cache_url.parse'
+    caster = Env.cache_url_config
     message = 'Cannot interpret cache URL value {0!r}'
     environ_name = 'CACHE_URL'
     late_binding = True
 
 
 class SearchURLValue(DictBackendMixin, CastingMixin, Value):
-    caster = 'dj_search_url.parse'
+    caster = Env.search_url_config
     message = 'Cannot interpret Search URL value {0!r}'
     environ_name = 'SEARCH_URL'
     late_binding = True

setup.py

@@ -26,16 +26,15 @@ def read(*parts):
             'django-cadmin = configurations.management:execute_from_command_line',
         ],
     },
-    install_requires=[
-        'django>=2.2',
-        'importlib-metadata;python_version<"3.8"',
+
+    install_requires=['django-environ',
+                      'django>=2.2',
+                     'importlib-metadata;python_version<"3.8"',
     ],
     extras_require={
-        'cache': ['django-cache-url'],
-        'database': ['dj-database-url'],
-        'email': ['dj-email-url'],
-        'search': ['dj-search-url'],
         'testing': [
+            'django-discover-runner',
+            'mock',
             'django-cache-url>=1.0.0',
             'dj-database-url',
             'dj-email-url',

tests/test_values.py

@@ -374,7 +374,6 @@ def test_database_url_value(self):
         with env(DATABASE_URL='sqlite://'):
             self.assertEqual(value.setup('DATABASE_URL'), {
                 'default': {
-                    'CONN_MAX_AGE': 0,
                     'ENGINE': 'django.db.backends.sqlite3',
                     'HOST': '',
                     'NAME': ':memory:',
@@ -411,7 +410,6 @@ def test_email_url_value(self):
                 'EMAIL_HOST_PASSWORD': 'password',
                 'EMAIL_HOST_USER': '[email protected]',
                 'EMAIL_PORT': 587,
-                'EMAIL_USE_SSL': False,
                 'EMAIL_USE_TLS': True})
         with env(EMAIL_URL='console://'):
             self.assertEqual(value.setup('EMAIL_URL'), {
@@ -420,17 +418,19 @@ def test_email_url_value(self):
                 'EMAIL_HOST': None,
                 'EMAIL_HOST_PASSWORD': None,
                 'EMAIL_HOST_USER': None,
-                'EMAIL_PORT': None,
-                'EMAIL_USE_SSL': False,
-                'EMAIL_USE_TLS': False})
+                'EMAIL_PORT': None})
+        with env(EMAIL_URL='console://'):
+            with patch('warnings.warn') as warn:
+                value.setup('EMAIL_URL')
+            warn.asset_called_once()
         with env(EMAIL_URL='smtps://[email protected]:[email protected]:wrong'):  # noqa: E501
             self.assertRaises(ValueError, value.setup, 'TEST')
 
     def test_cache_url_value(self):
         cache_setting = {
             'default': {
                 'BACKEND': 'django_redis.cache.RedisCache',
-                'LOCATION': 'redis://host:6379/1',
+                'LOCATION': 'redis://user@host:6379/1',
             }
         }
         cache_url = 'redis://user@host:6379/1'
@@ -443,13 +443,7 @@ def test_cache_url_value(self):
         with env(CACHE_URL='wrong://user@host:port/1'):
             with self.assertRaises(Exception) as cm:
                 value.setup('TEST')
-            self.assertEqual(cm.exception.args[0], 'Unknown backend: "wrong"')
-        with env(CACHE_URL='redis://user@host:port/1'):
-            with self.assertRaises(ValueError) as cm:
-                value.setup('TEST')
-            self.assertEqual(
-                cm.exception.args[0],
-                "Cannot interpret cache URL value 'redis://user@host:port/1'")
+            self.assertEqual(cm.exception.args[0], 'wrong')
 
     def test_search_url_value(self):
         value = SearchURLValue()
@@ -503,7 +497,6 @@ class Target:
                 'EMAIL_HOST_PASSWORD': 'password',
                 'EMAIL_HOST_USER': '[email protected]',
                 'EMAIL_PORT': 587,
-                'EMAIL_USE_SSL': False,
                 'EMAIL_USE_TLS': True
             })
             self.assertEqual(