在Heroku的迁徙失败

Question

我在Heroku上使用Django 1.7.1和Python 3在Cedar堆栈上运行了一个Django-CMS项目。

我可以使用：heroku run python manage.py makemigrations创建一个很好的迁移，它返回：

Migrations for 'zinnia':
    0002_entry_content_placeholder.py:
        - Add field content_placeholder to entry

但是，通过：heroku run python manage.py migrate运行迁移返回：

Operations to perform:
  Synchronize unmigrated apps: mptt, tagging, djangocms_admin_style, localflavor, django_comments, robots, ckeditor, sekizai, compressor, cmsplugin_plaintext, storages
  Apply all migrations: admin, cms, zinnia, sessions, contenttypes, sites, auth, djangocms_link, djangocms_file, djangocms_picture, djangocms_text_ckeditor, menus
Synchronizing apps without migrations:
  Creating tables...
  Installing custom SQL...
  Installing indexes...
Running migrations:
  No migrations to apply.
  Your models have changes that are not yet reflected in a migration,
      and so won't be applied.
  Run 'manage.py makemigrations' to make new migrations, and then re-run
      'manage.py migrate' to apply them.

重新运行makemigrations和migrate只返回相同的错误语句。我做错了什么？

Answer 1

我对此不太确定，但是在运行了迁移之后，文件创建了：

0002_entry_content_placeholder.py

正如您注意到的，是第二个迁移文件。如果这是您的选项，您可以尝试删除/重命名迁移文件夹/文件，然后再次运行makemigrations。不久前我也犯了同样的错误，如果我没记错的话，那就成功了。

抱歉英语不太好