关于Djanggo的环境变量

templates是Django指定的T目录，pycharm下templates的图标会变亮，static则可以改动。下面STATIC_URL可以指定，STATICFILES_DIRS则指定了templates的html文件的{% static 'css/style.css' %}寻址。

# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/1.11/howto/static-files/

STATIC_URL = '/static/'

STATICFILES_DIRS = [
    os.path.join(BASE_DIR, "static")
]

在templates的html文件中引入静态资源(js,css)

{% load staticfiles %}
......
<link href="{% static 'css/style.css' %}" rel="stylesheet" type="text/css" />

environ是一个字符串所对应环境的映像对象，类似于Windows的系统环境变量。Django之下默认根目录为项目根目录。

查看os.environ下有什么

import os
for i, v in enumerate(os.environ.items(), 1):
    print(i, v)

manage.py

#!/usr/bin/env python
import os
import sys

if __name__ == "__main__":
    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "LcvSearch.settings")
    try:
        from django.core.management import execute_from_command_line
    except ImportError:
        # The above import may fail for some other reason. Ensure that the
        # issue is really that Django is missing to avoid masking other
        # exceptions on Python 2.
        try:
            import django
        except ImportError:
            raise ImportError(
                "Couldn't import Django. Are you sure it's installed and "
                "available on your PYTHONPATH environment variable? Did you "
                "forget to activate a virtual environment?"
            )
        raise
    execute_from_command_line(sys.argv)

所以当要非项目文件使用Django的模型时就要配置环境变量，记得先引入环境变量。

import os
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "djblog.settings")