{
  "id": "python/django-orm-multiple-objects-returned",
  "signature": "django.core.exceptions.MultipleObjectsReturned: get() returned more than one Article -- it returned 2!",
  "signature_zh": "多个对象返回异常：get()返回了多个Article对象，共返回2个！",
  "regex": "django\\.core\\.exceptions\\.MultipleObjectsReturned:\\ get\\(\\)\\ returned\\ more\\ than\\ one\\ Article\\ \\-\\-\\ it\\ returned\\ 2!",
  "domain": "python",
  "category": "data_error",
  "subcategory": null,
  "root_cause": "使用get()查询时条件不唯一，匹配到多条记录",
  "root_cause_type": "generic",
  "root_cause_zh": "ORM查询中get()方法要求唯一结果，但查询条件匹配了多条记录",
  "versions": [
    {
      "version": "3.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "order_by只影响排序，不影响返回数量，get()仍会抛出异常",
      "fail_rate": 0.9,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "异常被吞掉后程序继续运行，可能导致数据不一致",
      "fail_rate": 0.6,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "",
      "success_rate": 0.95,
      "how": "article = Article.objects.filter(title='x').first()",
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "success_rate": 0.8,
      "how": "添加unique=True约束或使用get_object_or_404",
      "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": 0.88,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-01-22",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}