在引入新的应用程序（django-allauth）后执行迁移时出现错误。我不确定还有什么其他方法可以修复错误。我尝试了一些方法，但遗憾的是它们似乎没有帮助。
运行manage.py migrate命令时：
File "D:\Python27\Lib\site-packages\django\db\migrations\state.py", line 71,
in render raise
InvalidBasesError("Cannot resolve bases for %r\nThis can happen if you are inheriting
models from an app with migrations (e.g. contrib.auth)\n in an app with no migrations;
see https://docs.djangoproject.com/en/1.7/topics/migrations/#dependencies for more" %
new_unrendered_models)
django.db.migrations.state.InvalidBasesError: Cannot resolve bases for
[<ModelState: 'blog.BlogPage'>, <ModelState: 'blog.BlogIndexPage'>]
This can happen if you are inheriting models from an app with migrations
(e.g. contrib.auth) in an app with no migrations; see
https://docs.djangoproject.com/en/1.7/topics/migrations/#dependencies for more
models.py
from django.db import models
from wagtail.wagtailcore.models import Page, Orderable
from wagtail.wagtailcore.fields import RichTextField
from wagtail.wagtailadmin.edit_handlers import FieldPanel ,MultiFieldPanel,InlinePanel, PageChooserPanel
from modelcluster.fields import ParentalKey
class BlogPage(Page):
body = RichTextField()
date = models.DateField("Post date")
indexed_fields = ('body', )
search_name = "Blog Page"
BlogPage.content_panels = [
FieldPanel('title', classname="full title"),
FieldPanel('date'),
FieldPanel('body', classname="full"),
]
class LinkFields(models.Model):
link_page = models.ForeignKey(
'wagtailcore.Page',
null=True,
blank=True,
related_name='+'
)
panels = [
PageChooserPanel('link_page'),
]
class Meta:
abstract = True
class RelatedLink(LinkFields):
title = models.CharField(max_length=255, help_text="Link title")
panels = [
FieldPanel('title'),
MultiFieldPanel(LinkFields.panels, "Link"),
]
class Meta:
abstract = True
class BlogIndexPageRelatedLink(Orderable, RelatedLink):
page = ParentalKey('blog.BlogIndexPage', related_name='related_links')
class BlogIndexPage(Page):
intro = models.CharField(max_length=256)
indexed_fields = ('body', )
search_name = "Blog Index Page"
BlogIndexPage.content_panels = [
FieldPanel('title', classname="full title"),
FieldPanel('intro', classname="full"),
InlinePanel(BlogIndexPage, 'related_links', label="Related links"),
]
到目前为止我尝试了以下方法：
- 按照https://dev59.com/MYPba4cB1Zd3GeqPr2uz#25858659中的建议操作，但对我来说没有任何变化。
- 我还尝试了https://code.djangoproject.com/ticket/22051#comment:12，但没有成功。
注意：makemigrations运行正常（未检测到更改），但是migrate失败。
平台设置：当前在Windows系统上使用Django 1.7.1。django-allauth在此系统中的其他应用程序中也可以成功运行。
有人遇到过这种情况并且有解决办法吗？
提前致谢。
---下面是发出的指令序列：
(env) D:\git\rebootv2.1\blog>python manage.py migrate
D:\Python27\Lib\site-packages\treebeard\mp_tree.py:102: RemovedInDjango18Warning: `MP_NodeManager.get_query_set` method
should be renamed `get_queryset`.
class MP_NodeManager(models.Manager):
Operations to perform:
Synchronize unmigrated apps: account, allauth, modelcluster, blog, compressor, facebook, wagtailsnippets, socialaccount
Apply all migrations: core, wagtailusers, wagtailembeds, wagtailadmin, sessions, admin, wagtailcore, sites, auth, contenttypes, wagtaildocs, taggit, wagtailsearch, wagtailforms, wagtailredirects, wagtailimages
Synchronizing apps without migrations:
Creating tables...
Installing custom SQL...
Installing indexes...
Running migrations:
Applying sites.0001_initial...Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "D:\Python27\Lib\site-packages\django\core\management\__init__.py", line 385, in execute_from_command_line
utility.execute()
File "D:\Python27\Lib\site-packages\django\core\management\__init__.py", line 377, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "D:\Python27\Lib\site-packages\django\core\management\base.py", line 288, in run_from_argv
self.execute(*args, **options.__dict__)
File "D:\Python27\Lib\site-packages\django\core\management\base.py", line 338, in execute
output = self.handle(*args, **options)
File "D:\Python27\Lib\site-packages\django\core\management\commands\migrate.py", line 160, in handle
executor.migrate(targets, plan, fake=options.get("fake", False))
File "D:\Python27\Lib\site-packages\django\db\migrations\executor.py", line 63, in migrate
self.apply_migration(migration, fake=fake)
File "D:\Python27\Lib\site-packages\django\db\migrations\executor.py", line 91, in apply_migration
if self.detect_soft_applied(migration):
File "D:\Python27\Lib\site-packages\django\db\migrations\executor.py", line 135, in detect_soft_applied
apps = project_state.render()
File "D:\Python27\Lib\site-packages\django\db\migrations\state.py", line 71, in render raise InvalidBasesError("Cannot resolve bases for %r\nThis can happen if you are inheriting models from an app with migrations (e.g. contrib.auth)\n in an app with no migrations; see https://docs.djangoproject.com/en/1.7/topics/migrations/#dependencies for more" % new_unrendered_models)
django.db.migrations.state.InvalidBasesError: Cannot resolve bases for [<ModelState: 'blog.BlogPage'>, <ModelState: 'blog.BlogIndexPage'>]
This can happen if you are inheriting models from an app with migrations (e.g. contrib.auth)
in an app with no migrations; see https://docs.djangoproject.com/en/1.7/topics/migrations/#dependencies for more
(env) D:\git\rebootv2.1\blog>python manage.py makemigrations
D:\Python27\Lib\site-packages\treebeard\mp_tree.py:102: RemovedInDjango18Warning: `MP_NodeManager.get_query_set` method
should be renamed `get_queryset`.
class MP_NodeManager(models.Manager):
No changes detected
- 在settings.py中禁用所有的allauth应用程序
- 运行manage.py migrate，启用所有的allauth应用程序，并禁用为项目生成的wagtail应用程序（例如博客）
- 再次运行manage.py migrate，启用INSTALLED_APPS中的两组应用程序
- 再次运行manage.py migrate
现在看起来已经解决了问题。
希望这对某些人有所帮助并节省时间！