{
  "id": "python/django-database-connection-timeout",
  "signature": "django.db.utils.OperationalError: could not connect to server: Connection refused",
  "signature_zh": "数据库连接错误：无法连接到服务器：连接被拒绝",
  "regex": "django\\.db\\.utils\\.OperationalError:\\ could\\ not\\ connect\\ to\\ server:\\ Connection\\ refused",
  "domain": "python",
  "category": "network_error",
  "subcategory": null,
  "root_cause": "数据库服务器未运行或网络不可达",
  "root_cause_type": "generic",
  "root_cause_zh": "Django 无法连接到配置的数据库服务器",
  "versions": [
    {
      "version": "3.2",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "4.0",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "5.0",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "增加超时时间",
      "why_fails": "如果数据库未运行，超时无法解决问题",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    },
    {
      "action": "修改数据库配置为本地连接",
      "why_fails": "如果数据库在远程，本地连接无效",
      "fail_rate": 0.5,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "检查数据库服务状态",
      "success_rate": 0.9,
      "how": "systemctl status postgresql 或 service mysql status",
      "condition": "",
      "sources": []
    },
    {
      "action": "验证数据库配置",
      "success_rate": 0.95,
      "how": "检查 settings.py 中的 DATABASES 设置，确保主机、端口、用户名、密码正确",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": null,
  "official_doc_section": null,
  "error_code": null,
  "verification_tier": "ai_generated",
  "confidence": 0.87,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-12-01",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}