Django python不适用于未应用的迁移

Question

您有3个未应用的迁移。在应用app（s）的迁移之前，您的项目可能无法正常运行：news。 运行'python manage.py migrate'来应用它们。

运行此命令后，它给了我错误。

python manage.py migrate

Traceback (most recent call last):   File "manage.py", line 30, in <module>
    execute_from_command_line(sys.argv)   File "/usr/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
    utility.execute()   File "/usr/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 308, in execute
    settings.INSTALLED_APPS   File "/usr/local/lib/python2.7/site-packages/django/conf/__init__.py", line 56, in __getattr__
    self._setup(name)   File "/usr/local/lib/python2.7/site-packages/django/conf/__init__.py", line 41, in _setup
    self._wrapped = Settings(settings_module)   File "/usr/local/lib/python2.7/site-packages/django/conf/__init__.py", line 110, in __init__
    mod = importlib.import_module(self.SETTINGS_MODULE)   File "/usr/local/Cellar/python@2/2.7.15_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)   File "/Users/danazholdykhairova/Desktop/original/bootcamp/config/settings/local.py", line 5, in <module>
    from .base import *  # noqa   File enter code here"/Users/danazholdykhairova/Desktop/original/bootcamp/config/settings/base.py", line 267emphasized text
    REDIS_URL = f'{env("REDIS_URL", default="redis://127.0.0.1:6379")}/{0}'
                                                                          ^ SyntaxError: invalid syntax

Answer 1

REDIS_URL变量使用的是f-string - 它只在python 3.6中引入