在继承的情况下，字段会发生冲突

问题描述

我具有以下简化的模型结构:

I' ve the following simplified model structure:

#common/models.py
class CLDate(models.Model):
    active = models.BooleanField(default=True)
    last_modified = models.DateTimeField(auto_now=True)
    created = models.DateTimeField(auto_now_add=True)

#br/models.py
class Dokument(CLDate):
    user = models.ForeignKey(User)

class Entity(CLDate):
    dokument = models.ForeignKey(Dokument)

.这两个类都继承自CLDate，并且它们之间具有OneToMany关系.当我尝试迁移时，出现以下错误:

. Both class inherits from CLDate, and i' ve a OneToMany relation between them. When i try to migrate, i got the following error:

python manage.py makemigrations
SystemCheckError: System check identified some issues:

ERRORS:
br.Entity.dokument: (models.E006) The field 'dokument' clashes with the
field 'dokument' from model 'common.cldate'.

我真的不明白为什么这种结构对Django来说是个问题，因此Entity是与Dokument完全不同的对象.谁能解释我为什么，怎么用这种结构解决呢?因此，两者都应继承自CLDate，并且来自br应用程序的两个模型之间应该存在这种关系.

I can' t really get why is this structure a problem for Django hence the Entity is a totally different object than the Dokument. Could anyone explain me why, and how could i solve it with this structure? So both should inherit from CLDate and there should be this kind of relation between the 2 models from the br application.

我也尝试删除所有迁移文件，并以这种方式解决，但相同.Runserver也会给出此错误.

I also tried to delete all the migration files, and solve it that way, but the same. Runserver gives also this error.

Django:1.11.2的Python:3.4.2Debian:8.8

Django: 1.11.2Python: 3.4.2Debian: 8.8

.

谢谢.

如果我在Entity模型中重命名了dokument属性名称，它将正常工作.

If i rename the dokument property name in the Entity model, it works fine.

我几乎也以前使用过相同的布局(在以前的Django版本中).

I' m also almost pretty the same layout was working previously (in previous Django versions).

推荐答案

由于您使用的是多表继承，因此Django创建了一个从 Dokument 到 CLDate的隐式一对一字段..从 CLDate 到 Dokument 的反向关系 dokument 与您的 Entity.dokument 字段冲突.

Since you are using multi-table inheritance, Django creates an implicit one-to-one field from Dokument to CLDate. The reverse relation dokument from CLDate to Dokument is clashing with your Entity.dokument field.

如果您不想重命名 Entity.dokument 字段，则另一个选择是明确定义父链接字段，从 Dokument 到 CLDate ，然后设置 related_name .

If you don't want to rename your Entity.dokument field, then your other option is to explicitly define the parent link field from Dokument to CLDate and set related_name.

class Dokument(CLDate):
    cl_date = models.OneToOneField(CLDate, parent_link=True, related_name='related_dokument')
    user = models.ForeignKey(User)

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