id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
25807	makemigrations failed when CharField has validators=[validate_slug]	mrgaolei	Simon Charette	"Version 1.9rc1
When CharField have a validators=[validate_slug], it can not be makemigrations.

it prompt:
{{{
Traceback (most recent call last):
  File ""./manage.py"", line 10, in <module>
    execute_from_command_line(sys.argv)
  File ""/Users/mrgaolei/Desktop/proton/venv/lib/python2.7/site-packages/django/core/management/__init__.py"", line 350, in execute_from_command_line
    utility.execute()
  File ""/Users/mrgaolei/Desktop/proton/venv/lib/python2.7/site-packages/django/core/management/__init__.py"", line 342, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File ""/Users/mrgaolei/Desktop/proton/venv/lib/python2.7/site-packages/django/core/management/base.py"", line 348, in run_from_argv
    self.execute(*args, **cmd_options)
  File ""/Users/mrgaolei/Desktop/proton/venv/lib/python2.7/site-packages/django/core/management/base.py"", line 399, in execute
    output = self.handle(*args, **options)
  File ""/Users/mrgaolei/Desktop/proton/venv/lib/python2.7/site-packages/django/core/management/commands/makemigrations.py"", line 150, in handle
    self.write_migration_files(changes)
  File ""/Users/mrgaolei/Desktop/proton/venv/lib/python2.7/site-packages/django/core/management/commands/makemigrations.py"", line 178, in write_migration_files
    migration_string = writer.as_string()
  File ""/Users/mrgaolei/Desktop/proton/venv/lib/python2.7/site-packages/django/db/migrations/writer.py"", line 167, in as_string
    operation_string, operation_imports = OperationWriter(operation).serialize()
  File ""/Users/mrgaolei/Desktop/proton/venv/lib/python2.7/site-packages/django/db/migrations/writer.py"", line 124, in serialize
    _write(arg_name, arg_value)
  File ""/Users/mrgaolei/Desktop/proton/venv/lib/python2.7/site-packages/django/db/migrations/writer.py"", line 76, in _write
    arg_string, arg_imports = MigrationWriter.serialize(item)
  File ""/Users/mrgaolei/Desktop/proton/venv/lib/python2.7/site-packages/django/db/migrations/writer.py"", line 353, in serialize
    item_string, item_imports = cls.serialize(item)
  File ""/Users/mrgaolei/Desktop/proton/venv/lib/python2.7/site-packages/django/db/migrations/writer.py"", line 429, in serialize
    return cls.serialize_deconstructed(path, args, kwargs)
  File ""/Users/mrgaolei/Desktop/proton/venv/lib/python2.7/site-packages/django/db/migrations/writer.py"", line 318, in serialize_deconstructed
    arg_string, arg_imports = cls.serialize(arg)
  File ""/Users/mrgaolei/Desktop/proton/venv/lib/python2.7/site-packages/django/db/migrations/writer.py"", line 353, in serialize
    item_string, item_imports = cls.serialize(item)
  File ""/Users/mrgaolei/Desktop/proton/venv/lib/python2.7/site-packages/django/db/migrations/writer.py"", line 473, in serialize
    return cls.serialize_deconstructed(*value.deconstruct())
  File ""/Users/mrgaolei/Desktop/proton/venv/lib/python2.7/site-packages/django/db/migrations/writer.py"", line 314, in serialize_deconstructed
    arg_string, arg_imports = cls.serialize(arg)
  File ""/Users/mrgaolei/Desktop/proton/venv/lib/python2.7/site-packages/django/db/migrations/writer.py"", line 512, in serialize
    for item in value:
  File ""/Users/mrgaolei/Desktop/proton/venv/lib/python2.7/site-packages/django/utils/functional.py"", line 205, in inner
    return func(self._wrapped, *args)
TypeError: '_sre.SRE_Pattern' object is not iterable
}}}"	Bug	closed	Migrations	1.9rc1	Release blocker	fixed			Ready for checkin	1	0	0	0	0	0