Fixed #32047 -- Fixed call_command() crash if a constant option from required mutually exclusive group is passed in options.

django/core/management/__init__.py

@@ -2,7 +2,9 @@ import functools
 import os
 import pkgutil
 import sys
-from argparse import _SubParsersAction
+from argparse import (
+    _AppendConstAction, _CountAction, _StoreConstAction, _SubParsersAction,
+)
 from collections import defaultdict
 from difflib import get_close_matches
 from importlib import import_module
@@ -138,7 +140,9 @@ def call_command(command_name, *args, **options):
     # Any required arguments which are passed in via **options must be passed
     # to parse_args().
     parse_args += [
-        '{}={}'.format(min(opt.option_strings), arg_options[opt.dest])
+        min(opt.option_strings)
+        if isinstance(opt, (_AppendConstAction, _CountAction, _StoreConstAction))
+        else '{}={}'.format(min(opt.option_strings), arg_options[opt.dest])
         for opt in parser_actions if (
             opt.dest in options and
             (opt.required or opt in mutually_exclusive_required_options)

tests/user_commands/management/commands/mutually_exclusive_required.py

@@ -7,6 +7,13 @@ class Command(BaseCommand):
         group = parser.add_mutually_exclusive_group(required=True)
         group.add_argument('--foo-id', type=int, nargs='?', default=None)
         group.add_argument('--foo-name', type=str, nargs='?', default=None)
+        group.add_argument('--append_const', action='append_const', const=42)
+        group.add_argument('--const', action='store_const', const=31)
+        group.add_argument('--count', action='count')
+        group.add_argument('--flag_false', action='store_false')
+        group.add_argument('--flag_true', action='store_true')
 
     def handle(self, *args, **options):
-        self.stdout.write(','.join(options))
+        for option, value in options.items():
+            if value is not None:
+                self.stdout.write('%s=%s' % (option, value))

tests/user_commands/tests.py

@@ -243,10 +243,38 @@ class CommandTests(SimpleTestCase):
         self.assertIn('foo_id', out.getvalue())
         management.call_command('mutually_exclusive_required', foo_name='foo', stdout=out)
         self.assertIn('foo_name', out.getvalue())
-        msg = 'Error: one of the arguments --foo-id --foo-name is required'
+        msg = (
+            'Error: one of the arguments --foo-id --foo-name --append_const '
+            '--const --count --flag_false --flag_true is required'
+        )
         with self.assertRaisesMessage(CommandError, msg):
             management.call_command('mutually_exclusive_required', stdout=out)
 
+    def test_mutually_exclusive_group_required_const_options(self):
+        tests = [
+            ('append_const', [42]),
+            ('const', 31),
+            ('count', 1),
+            ('flag_false', False),
+            ('flag_true', True),
+        ]
+        for arg, value in tests:
+            out = StringIO()
+            expected_output = '%s=%s' % (arg, value)
+            with self.subTest(arg=arg):
+                management.call_command(
+                    'mutually_exclusive_required',
+                    '--%s' % arg,
+                    stdout=out,
+                )
+                self.assertIn(expected_output, out.getvalue())
+                out.truncate(0)
+                management.call_command(
+                    'mutually_exclusive_required',
+                    **{arg: value, 'stdout': out},
+                )
+                self.assertIn(expected_output, out.getvalue())
+
     def test_subparser(self):
         out = StringIO()
         management.call_command('subparser', 'foo', 12, stdout=out)