Fix Django 1.10 argument parsing error (#485)

* [FIX] #467 django 1.10 manage.py startup error

see #462 (comment)

* Add test.

* Update Changelog

Author: vytisb

Changelog

@@ -11,7 +11,7 @@
 =====
 :release-date: TDB
 
-- Now compatible with Django 1.9
+- Now compatible with Django 1.10
 
 - Dropped compatibility with Django 1.7 and earlier.
 
@@ -28,6 +28,10 @@
 - Fixed Django 1.10 compatibility issue in scheduler
 
     Fix contributed by Mathieu Fenniak.
+    
+- Fixed Django 1.10 compatibility issue in management commands
+
+    Fix contributed by Stranger6667, yjmade and Vytis Banaitis.
 
 - Fixed cache backend compatibility issue with Django 1.9
 

djcelery/management/base.py

@@ -72,6 +72,8 @@ def add_arguments(self, parser):
                          option.get("_short_opts", []))
                 if option.get('default') == ('NO', 'DEFAULT'):
                     option['default'] = None
+                if option.get("nargs") == 1:
+                    del option["nargs"]
                 del option["_long_opts"]
                 del option["_short_opts"]
                 if "type" in option:

djcelery/tests/test_commands.py

@@ -1,6 +1,6 @@
 # coding: utf-8
 from django import VERSION
-from django.core.management import call_command
+from django.core.management import execute_from_command_line
 
 from ._compat import patch
 
@@ -14,17 +14,18 @@ def test_celeryd_command():
     else:
         traceback = None
     with patch(CELERYD_COMMAND) as handle:
-        call_command('celeryd')
+        execute_from_command_line(['manage.py', 'celeryd', '--hostname=test',
+                                   '--loglevel=info'])
         handle.assert_called_with(
             autoreload=None, autoscale=None, beat=None, broker=None,
             concurrency=0, detach=None, exclude_queues=[], executable=None,
-            gid=None, heartbeat_interval=None, hostname=None, include=[],
-            logfile=None, loglevel='WARN', max_tasks_per_child=None,
+            gid=None, heartbeat_interval=None, hostname="test", include=[],
+            logfile=None, loglevel='info', max_tasks_per_child=None,
             no_color=False, no_execv=False, optimization=None, pidfile=None,
             pool_cls='prefork', purge=False, pythonpath=None, queues=[],
             quiet=None, schedule_filename='celerybeat-schedule',
             scheduler_cls=None, send_events=False, settings=None,
-            skip_checks=True, state_db=None, task_soft_time_limit=None,
+            state_db=None, task_soft_time_limit=None,
             task_time_limit=None, traceback=traceback, uid=None, umask=None,
             verbosity=1, without_gossip=False, without_heartbeat=False,
             without_mingle=False, working_directory=None