Django不为模型创建数据库表（不包括syncdb和南） [英] Django not creating db tables for models (neither with syncdb nor South)

问题描述

我在Centos VPS上有一个Django项目。

我创建了一些模型并对它们进行了调试，以便它们验证并且不会发生任何错误。
我将它们放在myapp中的models文件夹中，并将每个模型添加到此目录中的init文件中，例如：

从类别导入类别

我将应用添加到settings.py INSTALLED_APPS 并运行：

  Python manage.py syncdb 
  

它似乎工作正常，并添加了所有表与我的应用程序。

然后我安装了南方，并将其添加到 INSTALLED_APPS 并再次尝试syncdb并运行：

  Python manage.py schemamigration myapp --initial 
  

它正确生成文件，但没有任何内容（我的模型没有表）。

模型文件夹（usertype.py）中的示例文件

 从django.db导入模型
 
 class UserType（models.Model）：
 usertype_id = models.PositiveIntegerField（primary_key = True）
 description = model s.CharField（max_length = 100）
 is_admin = models.BooleanField（）
 is_moderator = models.BooleanField（）
 
 class Meta：
 app_label ='myapp' 
  

任何想法在这里可能会出现什么，为什么我无法得到任何东西来检测我的模型？

解决方案

你误解了与南方合作的过程。南方不仅仅是另一个应用，它是一个管理工具。您的应用程序需要从开始或转换为一个南方应用程序。话虽如此，这个过程是这样的：

1. 将南加到INSTALLED_APPS


2. 运行syncdb第一次


3. 将您的应用添加到INSTALLED_APPS *



4. 运行南初始化命令：

     python manage.py schemamigration myapp --initial 
     




5. 迁移：

     python manage.py migrate 
     

如果要转换项目：

1. 在添加南方之后运行syncdb



2. 运行：

   
   
   

   管理.py convert_to_south myapp

从现在开始，使用南方来管理您的迁移。 / p>

* ps - 您可以同时添加南方和您自己的应用程序，如果您记住将自己的应用程序放在南部。这是因为django按顺序读取INSTALLED_APPS - 它在所有应用程序上运行syncdb，但在安装南方之后，它不会安装其余的，而是告诉您使用南方命令来处理这些

编辑

我误导了你由于你非常重视南方的事情，我没有意识到，问题是您正在尝试使用模型作为目录模块而不是普通文件。这是在django中认出的问题，解决方法实际上与您一样，尽管如此：

说这是你的结构：

  project / 
 myapp / 
 models / 
 __init__.py 
 bar.py 
  

您需要 bar.py 如下所示：

 从django.db导入模型
 
 class Foo（models.Model）：
＃fields ... 
 
 class Meta：
 app_label ='myapp ' ＃你需要这个！ 
  

和 __ init __。py 需要看起来像这是：

 从酒吧进口Foo 
  

确保它看起来像这样，它会工作。

更新18/08/2014 p>

票据已更改为 wontfix ，因为显然，app_label 已修复更大的问题。 Huzza！

I have a Django project on a Centos VPS.

I created some models and debugged them so they validate and give no errors. I have them in a "models" folder in my myapp and have added each model to the init file in this directory, for example:

from category import Category

I added the app to settings.py INSTALLED_APPS and ran:

Python manage.py syncdb

It appeared to work fine and added all tables apart from the ones for my app.

I then installed South and added that to INSTALLED_APPS and, tried syncdb again and ran:

Python manage.py schemamigration myapp --initial

It generated the file correctly but nothing was in it (none of the tables my models).

An example file in "models" folder (usertype.py)

from django.db import models

class UserType(models.Model):
    usertype_id = models.PositiveIntegerField(primary_key=True)
    description = models.CharField(max_length=100)
    is_admin = models.BooleanField()
    is_moderator = models.BooleanField()

class Meta:
    app_label = 'myapp'

Any ideas what could be going wrong here and why I can't get anything to detect my models?

解决方案

you're misunderstanding the process of working with south. South isn't just another application, it's a managing tool. Your app needs to be a South application from the begining or converted to one. That being said, the process is like so:

1. Add South to INSTALLED_APPS
2. run syncdb for the first time
3. Add your app to INSTALLED_APPS*

4. run the south initialization command:

   python manage.py schemamigration myapp --initial
   

5. migrate:

   python manage.py migrate
   

If you want to convert a project:

1. Run syncdb after adding south

2. run:

   manage.py convert_to_south myapp

And use south from now on to manage your migrations.

*p.s. - you can add both south and your own app at the same time, if you keep in mind to put south before your own apps. That's because django reads INSTALLED_APPS in order - it runs syncdb on all apps, but after installing south it won't install the rest and instead tell you to use the south commands to handle those

edit

I misled you. Since you put so much emphasis on the south thing I didn't realize the problem was you were trying to use models as a directory module instead of a normal file. This is a recognized problem in django, and the workaround is actually exactly as you though in the first place:

say this is your structure:

project/
       myapp/
            models/
                  __init__.py
                  bar.py

you need bar.py to look like this:

from django.db import models

class Foo(models.Model):
    # fields...

    class Meta:
        app_label = 'myapp' #you need this!

and __init__.py needs to look like this:

from bar import Foo

Make sure it looks like this and it will work.

UPDATE 18/08/2014

The ticket has changed to wontfix, because apparently the bigger issue with the app_label has been fixed. Huzza!

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