《pythno编程从入门到实践》18.2.2中makemigrations时出错是啥情况

Traceback (most recent call last):
File "manage.py", line 15, in
execute_from_command_line(sys.argv)
File "/Users/taoyu/Desktop/learning_log/ll_env/lib/python3.7/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
utility.execute()
File "/Users/taoyu/Desktop/learning_log/ll_env/lib/python3.7/site-packages/django/core/management/__init__.py", line 357, in execute
django.setup()
File "/Users/taoyu/Desktop/learning_log/ll_env/lib/python3.7/site-packages/django/__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "/Users/taoyu/Desktop/learning_log/ll_env/lib/python3.7/site-packages/django/apps/registry.py", line 112, in populate
app_config.import_models()
File "/Users/taoyu/Desktop/learning_log/ll_env/lib/python3.7/site-packages/django/apps/config.py", line 198, in import_models
self.models_module = import_module(models_module_name)
File "/usr/local/Cellar/python/3.7.1/Frameworks/Python.framework/Versions/3.7/lib/python3.7/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "", line 1006, in _gcd_import
File "", line 983, in _find_and_load
File "", line 967, in _find_and_load_unlocked
File "", line 677, in _load_unlocked
File "", line 728, in exec_module
File "", line 219, in _call_with_frames_removed
File "/Users/taoyu/Desktop/learning_log/learning_logs/models.py", line 5, in
class Topics(models.Model):
File "/Users/taoyu/Desktop/learning_log/learning_logs/models.py", line 8, in Topics
date_added = models.DateTimeField(auto_now_add=Ture)
NameError: name 'Ture' is not defined

你输入错误了吧，是**True**而不是**ture**

True的名字写错了啊，不是Ture，是True