🔁 추천/정확도/최신/인기순 분리 전략

{
  "multi_match": {
    "query": "카카오",
    "fields": ["title^3", "content", "tags^2"],
    "type": "best_fields"
  }
}

{
  "function_score": {
    "query": {
      "match": {
        "title": "카카오"
      }
    },
    "functions": [
      {
        "field_value_factor": {
          "field": "likes",
          "factor": 1.5,
          "modifier": "sqrt",
          "missing": 0
        }
      },
      {
        "field_value_factor": {
          "field": "clicks",
          "factor": 0.5,
          "modifier": "log1p",
          "missing": 1
        }
      }
    ],
    "score_mode": "sum",
    "boost_mode": "replace"
  }
}

{
  "sort": [
    { "createdAt": { "order": "desc" } }
  ]
}

{
  "function_score": {
    "query": {
      "multi_match": {
        "query": "카카오",
        "fields": ["title^3", "content", "tags^2"]
      }
    },
    "functions": [
      {
        "field_value_factor": {
          "field": "likes",
          "factor": 1.2,
          "modifier": "sqrt"
        }
      },
      {
        "gauss": {
          "createdAt": {
            "origin": "now",
            "scale": "10d",
            "decay": 0.5
          }
        }
      }
    ],
    "score_mode": "sum",
    "boost_mode": "multiply"
  }
}