make exception handlers use package settings and match implementation to documentation

Author: sbussetti

README.rst

@@ -50,7 +50,6 @@ Installation
         'high': {
             'URL': os.getenv('REDISTOGO_URL', 'redis://localhost:6379/0'), # If you're on Heroku
             'DEFAULT_TIMEOUT': 500,
-            'EXCEPTION_HANDLERS': ['path.to.my.handler'], # If you need custom exception handlers
         },
         'low': {
             'HOST': 'localhost',
@@ -59,6 +58,8 @@ Installation
         }
     }
 
+    RQ_EXCEPTION_HANDLERS = ['path.to.my.handler'] # If you need custom exception handlers
+
 * Include ``django_rq.urls`` in your ``urls.py``:
 
 .. code-block:: python

django_rq/settings.py

@@ -17,3 +17,6 @@
     QUEUES_LIST.append({'name': key, 'connection_config': value})
 for config in get_unique_connection_configs():
     QUEUES_LIST.append({'name': 'failed', 'connection_config': config})
+
+# Get exception handlers
+EXCEPTION_HANDLERS = getattr(settings, 'RQ_EXCEPTION_HANDLERS', [])

django_rq/workers.py

@@ -1,9 +1,8 @@
-from django.conf import settings
-
 from rq import Worker
 from rq.utils import import_attribute
 
 from .queues import get_queues
+from .settings import EXCEPTION_HANDLERS
 
 
 def get_exception_handlers():
@@ -13,12 +12,7 @@ def get_exception_handlers():
         'EXCEPTION_HANDLERS': ['path.to.handler'],
     }
     """
-    RQ = getattr(settings, 'RQ', {})
-    exception_handlers = []
-    for path in RQ.get('EXCEPTION_HANDLERS', []):
-        handler = import_attribute(path)
-        exception_handlers.append(handler)
-    return exception_handlers
+    return [import_attribute(path) for path in EXCEPTION_HANDLERS]
 
 
 def get_worker(*queue_names):