{
  "id": "python/flask-session-not-configured",
  "signature": "RuntimeError: The session is unavailable because no secret key was set.",
  "signature_zh": "运行时错误：由于未设置密钥，会话不可用。",
  "regex": "RuntimeError:\\ The\\ session\\ is\\ unavailable\\ because\\ no\\ secret\\ key\\ was\\ set\\.",
  "domain": "python",
  "category": "config_error",
  "subcategory": null,
  "root_cause": "Flask 应用未设置 SECRET_KEY，而会话功能（如 session 对象）需要密钥来签名 cookie。",
  "root_cause_type": "generic",
  "root_cause_zh": "Flask 应用未设置 SECRET_KEY，而会话功能（如 session 对象）需要密钥来签名 cookie。",
  "versions": [
    {
      "version": "3.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "虽然能运行，但密钥泄露或固定会导致安全问题，且部署时容易忘记更改。",
      "fail_rate": 0.5,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "每次重启应用密钥不同，导致用户会话失效，体验差。",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "",
      "success_rate": 0.9,
      "how": "import os\napp.secret_key = os.environ.get('SECRET_KEY', os.urandom(24))",
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "success_rate": 0.85,
      "how": "class Config:\n    SECRET_KEY = 'your-secret-key'\napp.config.from_object(Config)",
      "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": 0.9,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-02-28",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}