Django：模型在被重构为单独的文件后，才被syncDB或南方识别 [英] Django: models aren't being recognized by syncDB or south after they have been refactored into separate files

问题描述

我有一个大型模型文件与所有的类和东西，很难维护在一个文件中。所以我已经将它重构成一个模型文件夹， init .py，并且每个类别都有一个。

然后我做了

  manage_noDebug.py schemamigration picviewer --auto 
 manage_noDebug.py schemamigration migrate picviewer 
  / pre> 
 
 
，并从数据库中删除了表，但没有按照我的想法添加model_ *表。现在可以拿起我的模型文件吗？
  manage_noDebug.py sql picviewer 
  
从上面输出是空的
 
 
 
我的文件夹的结构是： p> 
 
 
 picviewer 
 / models / 
  init  .py 
 Picture.py 
 paperType.py 
 ... 
 
 
 
其中一个文件类是：
  class cartItem（models.Model）：
 picture = models.ForeignKey（'Picture'，null = False）
 paperType = models.ForeignKey（'paperType'，null = False）
 printSize = models.ForeignKey（'printSize'，null = False）
 quantity = models.IntegerField（default = 1，validators = [validators.MinValueValidator（1）]）
 price = models.DecimalField（decimal_places = 2，max_digits = 8）
 dateCreated = models.DateTimeField（null = False）
 sessionKey = models.ForeignKey（Session，to_field =session_key，null = False）
 user = models.ForeignKey（User，null = True）
 
 class Meta：
 app_label ='picviewer'
  
设置安装的应用程序：
  INSTALLED_APPS =（
'django.contrib.auth '，
'django.contrib.contenttypes'，
'django.contrib.sessions'，
'django.contrib.sites'，
'django.contrib.messages' 
'django.contrib.admin'，
'picviewer'，
'south'
）
  
我已经尝试从项目目录中删除/迁移/目录并运行syncdb：
  D：\〜Sasha\eclipse_workspace\zavalen> manage_noDebug.py syncdb 
同步... 
找不到灯具。 
 
同步：
> django.contrib.auth 
> django.contrib.contenttypes 
> django.contrib.sessions 
> django.contrib.sites 
> django.contrib.messages 
> django.contrib.admin 
> picviewer 
>南
 
未同步（使用迁移）：
  -  
（使用./manage.py迁移迁移这些）
  
看起来像nativesyncDB或south schemamigration都看不到我的模型。
 
 
 
这里是表输出从dbShell：
  D：\〜Sasha\eclipse_workspace\zavalen> manage_noDebug.py dbshel​​l 
 SQLite版本3.7.5 
为说明输入.help
输入以;结尾的SQL语句
 sqlite> .tables 
 auth_group auth_user_user_permissions 
 auth_group_permissions django_admin_log 
 auth_message django_content_type 
 auth_permission django_session 
 auth_user django_site 
 auth_user_groups south_migrationhistory 
 sqlite> 
  
这是我的模型文件夹的目录：
  D：\〜Sasha\eclipse_workspace\zavalen\picviewer\models> dir * .py 
 D的目录：\〜Sasha \eclipse_workspace\ zavalen\picviewer\models 
 
 15.04.2011 16:38 1 125 cartItem.py 
 15.04.2011 16:43 1 283 Collection.py 
 15.04.2011 16： 40 419 ImageSizeRatio.py 
 15.04.2011 16:43 876 Menu.py 
 15.04.2011 16:43 1 667 Order.py 
 15.04.2011 14:07 1 457 OrderForm.py 
 15.04.2011 16:43 490 OrderStatusHistory.py 
 15.04.2011 16:43 683 paperType.py 
 15.04.2011 16:43 3 202 Picture.py 
 15.04.2011 16 ：43 1 520 printSize.py 
 15.04.2011 16:43 687 PurchaseItem.py 
 15.04.2011 16:43 1 239 Tools.py 
 15.04.2011 16:11 0 __init__.py 
  
 
 
解决方案
要公开类，您必须在 __ init __。py ，如：
 从图片导入Picture 
 from paperType import paperType 
 ... 
 __all__ = ['Picture'，'paperType'，...] 
  
导入的顺序很重要。
 
 
 
如果不这样做，您没有访问路径 picviewer.models.Picture ，它是 picviewer.models.Picture.Picture 。
 
I had a large models file with all the classes and stuff and it was hard to maintain all in one file. So I've refactored that into a model folder, init.py and files one per each class.

then I did
manage_noDebug.py schemamigration picviewer --auto
manage_noDebug.py schemamigration migrate picviewer
and south removed the tables from the database but hasn't added the model_* tables as I thought it would. Can I get it to pick up my model files now?
manage_noDebug.py sql picviewer
output from the above is empty

the structure of my folders is:

picviewer
     /models/
         init.py
         Picture.py
         paperType.py
         ...

one of the files classes is:
class cartItem(models.Model):
    picture = models.ForeignKey('Picture', null=False)
    paperType = models.ForeignKey('paperType', null=False)
    printSize = models.ForeignKey('printSize', null=False)
    quantity = models.IntegerField(default=1, validators=[validators.MinValueValidator(1)])
    price = models.DecimalField(decimal_places=2,max_digits=8)
    dateCreated = models.DateTimeField(null=False)
    sessionKey = models.ForeignKey(Session, to_field="session_key", null=False)
    user = models.ForeignKey(User,null=True)

    class Meta:
        app_label = 'picviewer'
settings installed apps:
INSTALLED_APPS = (
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.sites',
    'django.contrib.messages',
    'django.contrib.admin',
    'picviewer',
    'south'
)
I've tried removing /migrations/ directory from the project directory and running syncdb:
D:\~Sasha\eclipse_workspace\zavalen>manage_noDebug.py syncdb
Syncing...
No fixtures found.

Synced:
 > django.contrib.auth
 > django.contrib.contenttypes
 > django.contrib.sessions
 > django.contrib.sites
 > django.contrib.messages
 > django.contrib.admin
 > picviewer
 > south

Not synced (use migrations):
 -
(use ./manage.py migrate to migrate these)
Looks like neither "native" syncDB or south schemamigration are seeing my models.

Here is tables output from dbShell:
D:\~Sasha\eclipse_workspace\zavalen>manage_noDebug.py dbshell
SQLite version 3.7.5
Enter ".help" for instructions
Enter SQL statements terminated with a ";"
sqlite> .tables
auth_group                  auth_user_user_permissions
auth_group_permissions      django_admin_log
auth_message                django_content_type
auth_permission             django_session
auth_user                   django_site
auth_user_groups            south_migrationhistory
sqlite>
Here's dir for my models folder:
D:\~Sasha\eclipse_workspace\zavalen\picviewer\models>dir *.py
Directory of D:\~Sasha\eclipse_workspace\zavalen\picviewer\models

15.04.2011  16:38             1 125 cartItem.py
15.04.2011  16:43             1 283 Collection.py
15.04.2011  16:40               419 ImageSizeRatio.py
15.04.2011  16:43               876 Menu.py
15.04.2011  16:43             1 667 Order.py
15.04.2011  14:07             1 457 OrderForm.py
15.04.2011  16:43               490 OrderStatusHistory.py
15.04.2011  16:43               683 paperType.py
15.04.2011  16:43             3 202 Picture.py
15.04.2011  16:43             1 520 printSize.py
15.04.2011  16:43               687 PurchaseItem.py
15.04.2011  16:43             1 239 Tools.py
15.04.2011  16:11                 0 __init__.py

解决方案
To expose classes you have to import them in the __init__.py, like:
from Picture import Picture 
from paperType import paperType 
...
__all__ = ['Picture', 'paperType', ...]
The order of importing is important.

If you don't do this, you have no access path picviewer.models.Picture, it's picviewer.models.Picture.Picture.

                        
这篇关于Django：模型在被重构为单独的文件后，才被syncDB或南方识别的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！