{
  "id": "python/django-view-return-none",
  "signature": "The view app.views.my_view didn't return an HttpResponse object. It returned None instead.",
  "signature_zh": "视图app.views.my_view没有返回HttpResponse对象。而是返回了None。",
  "regex": "The\\ view\\ app\\.views\\.my_view\\ didn't\\ return\\ an\\ HttpResponse\\ object\\.\\ It\\ returned\\ None\\ instead\\.",
  "domain": "python",
  "category": "runtime_error",
  "subcategory": null,
  "root_cause": "View function does not return any value, or returns None implicitly.",
  "root_cause_type": "generic",
  "root_cause_zh": "视图函数没有返回任何值，或隐式返回None。",
  "versions": [
    {
      "version": "3.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "Adding print statements instead of return",
      "why_fails": "View must return an HttpResponse.",
      "fail_rate": 0.9,
      "condition": "",
      "sources": []
    },
    {
      "action": "Using return without value",
      "why_fails": "Returns None.",
      "fail_rate": 0.8,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "Ensure every code path returns an HttpResponse",
      "success_rate": 0.95,
      "how": "def my_view(request):\n    if condition:\n        return HttpResponse('OK')\n    return HttpResponse('Not OK')",
      "condition": "",
      "sources": []
    },
    {
      "action": "Use render or redirect",
      "success_rate": 0.9,
      "how": "return render(request, 'template.html')",
      "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": "2024-07-10",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}