把它扔在这里是因为我发现自己也犯了同样的错误,也为一首歌创建了一个模型!
from django.db import models
class Track(models.Model):
release = models.ForeignKey('Release', on_delete=models.CASCADE)
position = models.PositiveSmallIntegerField()
number = PositiveSmallIntegerField()
name = models.CharField(max_length=100)
length = models.DurationField()
这里有一点点不同。我models.
在我的PositiveSmallIntegerField
. 上面看起来你没有这样做,但也许有类似错误的其他人也会犯我的错误。
这是我的堆栈跟踪:
(env) Cam@cambook:~/Sites/juke% python manage.py makemigrations playlists
Traceback (most recent call last):
File "manage.py", line 15, in <module>
execute_from_command_line(sys.argv)
File "/Users/Cam/Sites/juke/env/lib/python3.6/site-packages/django/core/management/__init__.py", line 371, in execute_from_command_line
utility.execute()
File "/Users/Cam/Sites/juke/env/lib/python3.6/site-packages/django/core/management/__init__.py", line 347, in execute
django.setup()
File "/Users/Cam/Sites/juke/env/lib/python3.6/site-packages/django/__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "/Users/Cam/Sites/juke/env/lib/python3.6/site-packages/django/apps/registry.py", line 112, in populate
app_config.import_models()
File "/Users/Cam/Sites/juke/env/lib/python3.6/site-packages/django/apps/config.py", line 198, in import_models
self.models_module = import_module(models_module_name)
File "/usr/local/Cellar/python/3.6.5_1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 994, in _gcd_import
File "<frozen importlib._bootstrap>", line 971, in _find_and_load
File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 678, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/Users/Cam/Sites/juke/playlists/models.py", line 60, in <module>
class Track(models.Model):
File "/Users/Cam/Sites/juke/playlists/models.py", line 63, in Track
number = PositiveSmallIntegerField()
NameError: name 'PositiveSmallIntegerField' is not defined