Django syncdb没有为我的应用程序制作表格 [英] Django syncdb not making tables for my app

问题描述

它以前工作，现在没有。 python manage.py syncdb 不再为我的应用程序制作表。

从 settings.py ：

  INSTALLED_APPS =（
'django.contrib.auth'，
'django.contrib .contenttypes'，
'django.contrib.sessions'，
'django.contrib.sites'，
'mysite.myapp'，
'django.contrib.admin' 
）
  

我可以做错什么？在 models.py 中编辑此模型时，这个突破似乎是一致的，但这可能是完全巧合的。我评论了我改变的行，但仍然不起作用。

  class MyUser（models.Model）：
 user = models.ForeignKey（User，unique = True）
 takeReqSets = models.ManyToManyField（RequirementSet，blank = True）
 takingTerms = models.ManyToManyField（Term，blank = True）
 takeCourses = models.ManyToManyField（Course，through = TakingCourse，blank = True）
 school = models.ForeignKey（School）
＃minCreditsPerTerm = models.IntegerField（blank = True）
＃maxCreditsPerTerm = model.IntegerField（blank = True）
＃optimalCreditsPerTerm = models.IntegerField（blank = True）
  

更新：

当我运行 python manage.py loadddata initial_data 给出错误：

  DeserializationError：无效的模型标识符：myapp.SomeModel 
  

加载此数据之前工作正常。这个错误被抛出在数据文件中的第一个数据对象上。

SOLVED：

通过删除此行来修复：

   / pre> 
 
解决方案
我敢打赌，上面提到的SomeModel模型（不一定是MyUser）有一个问题，意味着它不能由loaddata导入。如果不是SomeModel，那么在同一个models.py中定义SomeModel的模型。
 
 
 
您是否尝试过 ./ manage.py validate ？即使说所有的模型都很好，有时候如果应用程序的models.py有一个错误，整个应用程序对于manage.py会变得不可见。我不能说我知道为什么这是这种情况，但似乎响了一声。
 
It used to work, and now it doesn't. python manage.py syncdb no longer makes tables for my app.

From settings.py:
INSTALLED_APPS = (
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.sites',
    'mysite.myapp',
    'django.contrib.admin',
)
What could I be doing wrong? The break appeared to coincide with editing this model in models.py, but that could be total coincidence. I commented out the lines I changed, and it still doesn't work.
class MyUser(models.Model):
    user = models.ForeignKey(User, unique=True)
    takingReqSets = models.ManyToManyField(RequirementSet, blank=True)
    takingTerms = models.ManyToManyField(Term, blank=True)
    takingCourses = models.ManyToManyField(Course, through=TakingCourse, blank=True)
    school = models.ForeignKey(School)
#    minCreditsPerTerm = models.IntegerField(blank=True)
#    maxCreditsPerTerm = models.IntegerField(blank=True)
#    optimalCreditsPerTerm = models.IntegerField(blank=True)
UPDATE:

When I run python manage.py loadddata initial_data, it gives an error:
DeserializationError: Invalid model identifier: myapp.SomeModel
Loading this data had worked fine before. This error is thrown on the very first data object in the data file.

SOLVED: 

Fixed by removing this line:
from stringprep import bl

解决方案
I'd bet that the SomeModel model you mention above (not necessarily MyUser) has got a problem with it which means it can't be imported by loaddata. If not SomeModel, then a model in the same models.py that SomeModel is defined in. 

Have you tried ./manage.py validate ? Even if that says all models are fine, sometimes if there's an error in a models.py of an an app, the entire app becomes 'invisible' to manage.py. I can't say I know why this is the case, but seems to ring a bell.

                        
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