Fixed #22985 -- Made call_command accept option name parameter

Thanks giulettamasina for the report and Tim Graham for the review.

django/core/management/__init__.py

@@ -102,8 +102,12 @@ def call_command(name, *args, **options):
     # Simulate argument parsing to get the option defaults (see #10080 for details).
     parser = command.create_parser('', name)
     if command.use_argparse:
+        # Use the `dest` option name from the parser option
+        opt_mapping = dict((sorted(s_opt.option_strings)[0].lstrip('-').replace('-', '_'), s_opt.dest)
+                            for s_opt in parser._actions if s_opt.option_strings)
+        arg_options = dict((opt_mapping.get(key, key), value) for key, value in options.items())
         defaults = parser.parse_args(args=args)
-        defaults = dict(defaults._get_kwargs(), **options)
+        defaults = dict(defaults._get_kwargs(), **arg_options)
     else:
         # Legacy optparse method
         defaults, _ = parser.parse_args(args=[])

docs/ref/django-admin.txt

@@ -1824,10 +1824,27 @@ Examples::
       management.call_command('loaddata', 'test_data', verbosity=0)
 
 Note that command options that take no arguments are passed as keywords
-with ``True`` or ``False``::
+with ``True`` or ``False``, as you can see with the ``interactive`` option above.
 
+Named arguments can be passed by using either one of the following syntaxes::
+
+      # Similar to the command line
+      management.call_command('dumpdata', '--natural')
+
+      # Named argument similar to the command line minus the initial dashes and
+      # with internal dashes replaced by underscores
+      management.call_command('dumpdata', natural=True)
+
+      # `use_natural_keys` is the option destination variable
       management.call_command('dumpdata', use_natural_keys=True)
 
+.. versionchanged:: 1.8
+
+    The first syntax is now supported thanks to management commands using the
+    :py:mod:`argparse` module. For the second syntax, Django previously passed
+    the option name as-is to the command, now it is always using the ``dest``
+    variable name (which may or may not be the same as the option name).
+
 Command options which take multiple options are passed a list::
 
       management.call_command('dumpdata', exclude=['contenttypes', 'auth'])

docs/releases/1.8.txt

@@ -196,6 +196,13 @@ Management Commands
 
 * :djadmin:`inspectdb` now outputs ``Meta.unique_together``.
 
+* When calling management commands from code through :ref:`call_command
+  <call-command>` and passing options, the option name can match the command
+  line option name (without the initial dashes) or the final option destination
+  variable name, but in either case, the resulting option received by the
+  command is now always the ``dest`` name specified in the command option
+  definition (as long as the command uses the new :py:mod:`argparse` module).
+
 Models
 ^^^^^^
 

tests/user_commands/management/commands/dance.py

@@ -9,9 +9,11 @@ class Command(BaseCommand):
     def add_arguments(self, parser):
         parser.add_argument("-s", "--style", default="Rock'n'Roll")
         parser.add_argument("-x", "--example")
+        parser.add_argument("--opt-3", action='store_true', dest='option3')
 
     def handle(self, *args, **options):
         example = options["example"]
         if example == "raise":
             raise CommandError()
         self.stdout.write("I don't feel like dancing %s." % options["style"])
+        self.stdout.write(','.join(options.keys()))

tests/user_commands/tests.py

@@ -15,14 +15,15 @@ class CommandTests(SimpleTestCase):
     def test_command(self):
         out = StringIO()
         management.call_command('dance', stdout=out)
-        self.assertEqual(out.getvalue(),
-            "I don't feel like dancing Rock'n'Roll.\n")
+        self.assertIn("I don't feel like dancing Rock'n'Roll.\n", out.getvalue())
 
     def test_command_style(self):
         out = StringIO()
         management.call_command('dance', style='Jive', stdout=out)
-        self.assertEqual(out.getvalue(),
-            "I don't feel like dancing Jive.\n")
+        self.assertIn("I don't feel like dancing Jive.\n", out.getvalue())
+        # Passing options as arguments also works (thanks argparse)
+        management.call_command('dance', '--style', 'Jive', stdout=out)
+        self.assertIn("I don't feel like dancing Jive.\n", out.getvalue())
 
     def test_language_preserved(self):
         out = StringIO()
@@ -76,6 +77,17 @@ class CommandTests(SimpleTestCase):
             if current_path is not None:
                 os.environ['PATH'] = current_path
 
+    def test_call_command_option_parsing(self):
+        """
+        When passing the long option name to call_command, the available option
+        key is the option dest name (#22985).
+        """
+        out = StringIO()
+        management.call_command('dance', stdout=out, opt_3=True)
+        self.assertIn("option3", out.getvalue())
+        self.assertNotIn("opt_3", out.getvalue())
+        self.assertNotIn("opt-3", out.getvalue())
+
     def test_optparse_compatibility(self):
         """
         optparse should be supported during Django 1.8/1.9 releases.