{
  "id": "python/flask-runtimeerror-application-context-not-available",
  "signature": "RuntimeError: Working outside of application context.",
  "signature_zh": "运行时错误：在应用上下文之外工作。",
  "regex": "RuntimeError:\\ Working\\ outside\\ of\\ application\\ context\\.",
  "domain": "python",
  "category": "runtime_error",
  "subcategory": null,
  "root_cause": "Code tries to access application-level context (e.g., current_app, g) outside of an application context, such as in a background thread or before first request.",
  "root_cause_type": "generic",
  "root_cause_zh": "代码在应用上下文之外尝试访问应用级上下文（如current_app, g），例如在后台线程或第一个请求之前。",
  "versions": [
    {
      "version": "3.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "Using current_app in a module-level variable",
      "why_fails": "Module-level code runs before app context exists.",
      "fail_rate": 0.8,
      "condition": "",
      "sources": []
    },
    {
      "action": "Assuming g is always available",
      "why_fails": "g is request-specific and only available within request context.",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "Push application context manually",
      "success_rate": 0.9,
      "how": "with app.app_context():\n    # access current_app here\n    pass",
      "condition": "",
      "sources": []
    },
    {
      "action": "Use Flask's before_first_request decorator",
      "success_rate": 0.85,
      "how": "@app.before_first_request\ndef setup():\n    # setup code here\n    pass",
      "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": 0.82,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2025-07-22",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}