python manage.py runserver 0.0.0.0:8080

Performing system checks...

System check identified no issues (0 silenced).
Unhandled exception in thread started by <function wrapper at 0x2af27879d578>
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/django/utils/autoreload.py", line 226, in wrapper
    fn(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 124, in inner_run
    self.check_migrations()
  File "/usr/local/lib/python2.7/site-packages/django/core/management/base.py", line 437, in check_migrations
    executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])
  File "/usr/local/lib/python2.7/site-packages/django/db/migrations/executor.py", line 20, in init
    self.loader = MigrationLoader(self.connection)
  File "/usr/local/lib/python2.7/site-packages/django/db/migrations/loader.py", line 52, in init
    self.build_graph()
  File "/usr/local/lib/python2.7/site-packages/django/db/migrations/loader.py", line 203, in build_graph
    self.applied_migrations = recorder.applied_migrations()
  File "/usr/local/lib/python2.7/site-packages/django/db/migrations/recorder.py", line 65, in applied_migrations
    self.ensure_schema()
  File "/usr/local/lib/python2.7/site-packages/django/db/migrations/recorder.py", line 56, in ensure_schema
    with self.connection.schema_editor() as editor:
  File "/usr/local/lib/python2.7/site-packages/django/db/backends/sqlite3/schema.py", line 25, in enter
    self._initial_pragma_fk = c.fetchone()[0]

TypeError: 'NoneType' object has no attribute 'getitem'

环境说明：

# python
Python 2.7.12 (default, Sep 27 2016, 00:24:04)

# which python
/usr/local/bin/python

# which django-admin
/usr/local/bin/django-admin