django 2 无法将环境变量从 .env 文件加载到 setting.py 文件 [英] django 2 not able to load env variables from the .env file to setting.py file

问题描述

我尝试将环境变量从名为 .env 的文件加载到 settings.py 文件在这里我创建了 .env 文件和设置文件相同的文件夹.

I tried to load environment variables from a file named .env to settings.py file here i created the .env file and settings file same folder.

这是我的 .env 文件

this is my .env file

DEBUG=on
SECRET_KEY=ksmdfw3324@#jefm
DATABASE_URL=psql://urser:un-githubbedpassword@127.0.0.1:8458/database
SQLITE_URL=sqlite:///my-local-sqlite.db
CACHE_URL=memcache://127.0.0.1:11211,127.0.0.1:11212,127.0.0.1:11213
REDIS_URL=rediscache://127.0.0.1:6379/1? 
client_class=django_redis.client.DefaultClient&password=ungithubbed-secret


MYSQL_DATABASE = student
MYSQL_USERNAME = root 
SECRET_KEY=secret-key

这是我的 setting.py 文件

this is my setting.py file

import os

from os.path import join, dirname
from dotenv import load_dotenv

dotenv_path = join(dirname(__file__), '.env')

load_dotenv(dotenv_path)

# Accessing variables.
dbname = os.getenv('MYSQL_DATABASE')
secret_key = os.getenv('SECRET_KEY')

# Using variables.
print(dabname)
print(secret_key)

我安装了pip install -U python-dotenv

问题是我无法在设置文件中获取环境变量

Issue is i am not able to get environment variable inside settings file

在尝试 python manage.py runserver 时出现此错误

while trying python manage.py runserver i am getting this error

C:UsersmehulAppDataLocalProgramsPythonPython36-32libsite- 
packagesdotenvmain.py:65: UserWarning: File doesn't exist
warnings.warn("File doesn't exist {}".format(self.dotenv_path))
Traceback (most recent call last):
File "manage.py", line 28, in <module>
execute_from_command_line(sys.argv)
File "C:UsersmehulAppDataLocalProgramsPythonPython36-32libsite- 
packagesdjangocoremanagement\__init__.py", line 371, in 
execute_from_command_line
utility.execute()
File "C:UsersmehulAppDataLocalProgramsPythonPython36-32libsite- 
packagesdjangocoremanagement\__init__.py", line 317, in execute
settings.INSTALLED_APPS
File "C:UsersmehulAppDataLocalProgramsPythonPython36-32libsite- 
packagesdjangoconf\__init__.py", line 56, in __getattr__
self._setup(name)
File "C:UsersmehulAppDataLocalProgramsPythonPython36-32libsite- 
packagesdjangoconf\__init__.py", line 43, in _setup
self._wrapped = Settings(settings_module)
File "C:UsersmehulAppDataLocalProgramsPythonPython36-32libsite- 
packagesdjangoconf\__init__.py", line 106, in __init__
mod = importlib.import_module(self.SETTINGS_MODULE)
File "C:UsersmehulAppDataLocalProgramsPythonPython36- 
32libimportlib\__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 994, in _gcd_import
File "<frozen importlib._bootstrap>", line 971, in _find_and_load
File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 678, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "C:xampphtdocsepitastudentepitastudentsettings.py", line 25, in 
<module>
load_dotenv()
File "C:UsersmehulAppDataLocalProgramsPythonPython36-32libsite- 
packagesdotenvmain.py", line 255, in load_dotenv
return DotEnv(f, 
verbose=verbose).set_as_environment_variables(override=override)
File "C:UsersmehulAppDataLocalProgramsPythonPython36-32libsite- 
packagesdotenvmain.py", line 98, in set_as_environment_variables
os.environ[k] = v
File "C:UsersmehulAppDataLocalProgramsPythonPython36-32libos.py", 
line 675, in __setitem__
 self.putenv(key, value)
 ValueError: embedded null character

我不确定如何创建开发和生产环境变量以及这个嵌入的空字符.请帮帮我在此先感谢

I am not sure how to create development and production environment variable and about this embedded null character. pls help me any one Thanks in advance

我现在将 .env 文件放入内部设置

I got now .env file to inside settings

import os
import environ
root = environ.Path(__file__) - 3 # three folder back (/a/b/c/ - 3 = /)
env = environ.Env(DEBUG=(bool, False),) # set default values and casting
environ.Env.read_env() # reading .env file
print(os.getenv('DATABASE_NAME'))

如何区分开发环境凭据和生产凭据

How can i differentiate development env credentials and production credentials

推荐答案

试试这个:

import os
import environ

BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
environ.Env.read_env(env_file=os.path.join(BASE_DIR, '.env'))

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