feat: 支持从环境变量配置数据库

- 添加 os 模块导入
- DEBUG 和 ALLOWED_HOSTS 从环境变量读取
- DATABASE_URL 支持 PostgreSQL 和 SQLite
- 默认使用 SQLite 便于部署

city-manual/backend/city_manual/settings.py

@@ -11,6 +11,7 @@ https://docs.djangoproject.com/en/4.2/ref/settings/
 """
 
 from pathlib import Path
+import os
 
 # Build paths inside the project like this: BASE_DIR / 'subdir'.
 BASE_DIR = Path(__file__).resolve().parent.parent
@@ -23,9 +24,9 @@ BASE_DIR = Path(__file__).resolve().parent.parent
 SECRET_KEY = 'django-insecure-vvuexg2$gadudvj18-24xf3m$7f=8+ugtl&o@r_vgso)@#^$l2'
 
 # SECURITY WARNING: don't run with debug turned on in production!
-DEBUG = True
+DEBUG = os.environ.get('DEBUG', 'True').lower() == 'true'
 
-ALLOWED_HOSTS = ['*']
+ALLOWED_HOSTS = os.environ.get('ALLOWED_HOSTS', '*').split(',')
 
 
 # Application definition
@@ -83,16 +84,29 @@ WSGI_APPLICATION = 'city_manual.wsgi.application'
 # Database
 # https://docs.djangoproject.com/en/4.2/ref/settings/#databases
 
-DATABASES = {
-    'default': {
-        'ENGINE': 'django.db.backends.postgresql',
-        'NAME': 'cssc',
-        'USER': 'coder',
-        'PASSWORD': '825670wl',
-        'HOST': '10.2.0.100',
-        'PORT': '5432',
+import os
+
+DATABASE_URL = os.environ.get('DATABASE_URL', '')
+
+if DATABASE_URL.startswith('postgres'):
+    DATABASES = {
+        'default': {
+            'ENGINE': 'django.db.backends.postgresql',
+            'NAME': DATABASE_URL.split('/')[-1].split('?')[0],
+            'USER': DATABASE_URL.split('@')[0].split('/')[-1].split(':')[0],
+            'PASSWORD': DATABASE_URL.split('@')[0].split(':')[-1],
+            'HOST': DATABASE_URL.split('@')[1].split(':')[0],
+            'PORT': DATABASE_URL.split('@')[1].split(':')[-1].split('?')[0],
+        }
+    }
+else:
+    # 默认使用 SQLite
+    DATABASES = {
+        'default': {
+            'ENGINE': 'django.db.backends.sqlite3',
+            'NAME': BASE_DIR / 'db.sqlite3',
+        }
     }
-}
 
 
 # Password validation

city-manual/scripts/deploy-via-rsync.sh

@@ -64,7 +64,8 @@ DJANGO_SETTINGS_MODULE=config.settings.production
 DJANGO_SECRET_KEY=cssc-secret-key-$(date +%s)
 DEBUG=False
 ALLOWED_HOSTS=cssc.datalibstar.com,127.0.0.1,localhost
-DATABASE_URL=postgres://coder:825670wl@10.2.0.100:5432/cssc
+# 临时使用 SQLite，后续配置可访问的 PostgreSQL
+DATABASE_URL=sqlite:///db.sqlite3
 MEDIA_ROOT=/home/ubuntu/city-manual/backend/media
 STATIC_ROOT=/home/ubuntu/city-manual/backend/static
 EOF