[1.8.x] Fixed #24769 -- Cast optparse verbosity argument to an integer for better backwards compatibility.

Using `BaseCommand.options_list` makes Django use the legacy optparse
parser, which does not set the verbosity attribute correctly. Now the
verbosity argument is always cast to int. Regression in 8568638 (#19973).

Initial report and patch from blueyed.

Backport of a0047c6242 from master

django/core/management/base.py

@@ -300,6 +300,9 @@ class BaseCommand(object):
 
         """
         if not self.use_argparse:
+            def store_as_int(option, opt_str, value, parser):
+                setattr(parser.values, option.dest, int(value))
+
             # Backwards compatibility: use deprecated optparse module
             warnings.warn("OptionParser usage for Django management commands "
                           "is deprecated, use ArgumentParser instead",
@@ -307,8 +310,8 @@ class BaseCommand(object):
             parser = OptionParser(prog=prog_name,
                                 usage=self.usage(subcommand),
                                 version=self.get_version())
-            parser.add_option('-v', '--verbosity', action='store', dest='verbosity', default='1',
+            parser.add_option('-v', '--verbosity', action='callback', dest='verbosity', default=1,
-                type='choice', choices=['0', '1', '2', '3'],
+                type='choice', choices=['0', '1', '2', '3'], callback=store_as_int,
                 help='Verbosity level; 0=minimal output, 1=normal output, 2=verbose output, 3=very verbose output')
             parser.add_option('--settings',
                 help=(

docs/releases/1.8.3.txt

@@ -62,3 +62,7 @@ Bugfixes
 
 * Fixed ``SimpleTestCase.assertRaisesMessage()`` on Python 2.7.10
   (:ticket:`24903`).
+
+* Provided better backwards compatibility for the ``verbosity`` argument in
+  ``optparse`` management commands by casting it to an integer
+  (:ticket:`24769`).

tests/user_commands/management/commands/optparse_cmd.py

@@ -16,4 +16,5 @@ class Command(BaseCommand):
         options["example"]
         # BaseCommand default option is available
         options['verbosity']
+        assert isinstance(options['verbosity'], int), "verbosity option is not int, but %s" % type(options['verbosity'])
         self.stdout.write("All right, let's dance %s." % options["style"])