Hello, I have the task of convert the project from django version 1.8.2 to
version 1.11. Faced a problem with which I can not cope. That model of
tables, which worked excellently in 1.8.2, stopped working in version 1.11,
and falls out with an error:
core.CarModel.manufacture: (models.E006) The field 'manufacture'
clashes with the field 'manufacture' from model 'core.page'.
Apparently this is due to the inheritance of models, since the project is
old I can not fundamentally change the scheme of tables, please tell me how
to get out of this situation.
Thank you in advance for your help.
I have reproduced the scheme of models, which works fine on 1.8.2 and stops
working on 1.11:
# -*- coding:utf-8 -*-
from django.db import models
from django.contrib.contenttypes.models import ContentType
class InheritanceCastModel(models.Model):
real_type = models.ForeignKey(ContentType, editable=False)
def save(self, *args, **kwargs):
if not self.id:
self.real_type = self._get_real_type()
super(InheritanceCastModel, self).save(*args, **kwargs)
def _get_real_type(self):
return ContentType.objects.get_for_model(type(self))
def cast(self):
return self.real_type.get_object_for_this_type(pk=self.pk)
class Meta:
abstract = True
class Page(InheritanceCastModel):
title = models.CharField(max_length=512, verbose_name=u'Title',
blank=True)
class Manufacture(Page):
ru_title = models.CharField(max_length=128, verbose_name=u'RU
Title')
class CarModel(Page):
manufacture = models.ForeignKey(Manufacture,
verbose_name=u'Manufacture')
ru_title = models.CharField(max_length=64, verbose_name=u'RU Title')
this question on
stackoverflow:
http://stackoverflow.com/questions/43327543/inheritance-models-from-django-1-8-2-to-django-1-11
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