Atlas Vector Search と Atlas Search を使用したハイブリッド検索の実行

mongosh を使用して Atlas クラスターに接続します。

詳しくは、「 mongosh経由で接続 」を参照してください。

インデックスを作成するコレクションを含むデータベースに切り替えます。

use sample_mflix

switched to db sample_mflix

Atlas Vector Search インデックスを定義します。

次のコマンドを実行します。次のインデックス定義は、コレクションをクエリするときに、plot_embedding_voyage_3_large フィールドを Atlas Vector Search フィールドとしてインデックス化します。

1
db.embedded_movies.createSearchIndex(
2
  "hybrid-vector-search", 
3
  "vectorSearch", 
4
  {
5
    "fields": [
6
      {
7
        "type": "vector",
8
        "path": "plot_embedding_voyage_3_large",
9
        "numDimensions": 2048,
10
        "similarity": "dotProduct"
11
      }
12
    ]
13
  }
14
);

Atlas Search インデックスを定義します。

次のインデックス定義は、コレクション内のすべての動的にインデックス可能なフィールドを自動的にインデックス化します。

1
db.embedded_movies.createSearchIndex(
2
  "hybrid-full-text-search", 
3
  "search", 
4
  {
5
    "mappings": {
6
      "dynamic": true
7
    }
8
  }
9
);

クエリで使用する埋め込みを設定します。

1. query-embeddings.jsという名前のファイルを作成します。

2. 次の埋め込みをコピーして、ファイルに貼り付けます。

   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3. ファイルを保存して閉じます。

mongosh を使用してクラスターに接続します。

ターミナル ウィンドウでmongoshを開き、クラスターに接続します。 接続の詳細な手順については、「 mongosh経由での接続 」を参照してください。

sample_mflix データベースを使用します。

mongoshプロンプトで次のコマンドを実行します。

use sample_mflix

switched to db sample_mflix

クエリで使用する埋め込みをロードします。

<path-to-file> を embeddings.js ファイルへの絶対パスに置き換えた後、次のコマンドを実行して埋め込みをロードしてください。

load('/<path-to-file>/embeddings.js');

埋め込みが正常にロードされたことを確認するには、次のコマンドを実行します。

STAR_WARS_EMBEDDING.length

2048

embedded_movies コレクションに対して、以下のAtlas Searchクエリを実行します。

1
db.embedded_movies.aggregate([
2
  {
3
    $rankFusion: {
4
      input: {
5
        pipelines: {
6
          vectorPipeline: [
7
            {
8
              "$vectorSearch": {
9
                "index": "hybrid-vector-search",
10
                "path": "plot_embedding_voyage_3_large",
11
                "queryVector": STAR_WARS_EMBEDDING,
12
                "numCandidates": 100,
13
                "limit": 20
14
              }
15
            }
16
          ],
17
          fullTextPipeline: [
18
            {
19
              "$search": {
20
                "index": "hybrid-full-text-search",
21
                "phrase": {
22
                  "query": "star wars",
23
                  "path": "title"
24
                }
25
              }
26
            },
27
            { "$limit": 20 }
28
          ]
29
        }
30
      },
31
      combination: {
32
        weights: {
33
          vectorPipeline: 0.5,
34
          fullTextPipeline: 0.5
35
        }
36
      },
37
      "scoreDetails": true
38
    }
39
  },
40
  {
41
    "$project": {
42
      _id: 1,
43
      title: 1,
44
      plot: 1,
45
      scoreDetails: {"$meta": "scoreDetails"}
46
    }
47
  },
48
  {
49
    "$limit": 10
50
  }
51
]);

[
  {
    _id: ObjectId('573a1397f29313caabce68f6'),
    plot: "Luke Skywalker joins forces with a Jedi Knight, a cocky pilot, a wookiee and two droids to save the universe from the Empire's world-destroying battle-station, while also attempting to rescue Princess Leia from the evil Darth Vader.",
    title: 'Star Wars: Episode IV - A New Hope',
    scoreDetails: {
      value: 0.01626123744050767,
      description: 'value output by reciprocal rank fusion algorithm, computed as sum of (weight * (1 / (60 + rank))) across input pipelines from which this document is output, from:',
      details: [
        {
          inputPipelineName: 'fullTextPipeline',
          rank: 2,
          weight: 0.5,
          value: 2.9571781158447266,
          details: []
        },
        {
          inputPipelineName: 'vectorPipeline',
          rank: 1,
          weight: 0.5,
          value: 0.7987099885940552,
          details: []
        }
      ]
    }
  },
  {
    _id: ObjectId('573a139af29313caabcf0f5f'),
    plot: 'Two Jedi Knights escape a hostile blockade to find allies and come across a young boy who may bring balance to the Force, but the long dormant Sith resurface to reclaim their old glory.',
    title: 'Star Wars: Episode I - The Phantom Menace',
    scoreDetails: {
      value: 0.015527202696196438,
      description: 'value output by reciprocal rank fusion algorithm, computed as sum of (weight * (1 / (60 + rank))) across input pipelines from which this document is output, from:',
      details: [
        {
          inputPipelineName: 'fullTextPipeline',
          rank: 2,
          weight: 0.5,
          value: 2.9571781158447266,
          details: []
        },
        {
          inputPipelineName: 'vectorPipeline',
          rank: 7,
          weight: 0.5,
          value: 0.7771433591842651,
          details: []
        }
      ]
    }
  },
  {
    _id: ObjectId('573a1397f29313caabce77d9'),
    plot: 'After the rebels have been brutally overpowered by the Empire on their newly established base, Luke Skywalker takes advanced Jedi training with Master Yoda, while his friends are pursued by Darth Vader as part of his plan to capture Luke.',
    title: 'Star Wars: Episode V - The Empire Strikes Back',
    scoreDetails: {
      value: 0.015504807692307693,
      description: 'value output by reciprocal rank fusion algorithm, computed as sum of (weight * (1 / (60 + rank))) across input pipelines from which this document is output, from:',
      details: [
        {
          inputPipelineName: 'fullTextPipeline',
          rank: 4,
          weight: 0.5,
          value: 2.712062358856201,
          details: []
        },
        {
          inputPipelineName: 'vectorPipeline',
          rank: 5,
          weight: 0.5,
          value: 0.7810181975364685,
          details: []
        }
      ]
    }
  },
  {
    _id: ObjectId('573a1397f29313caabce8cdb'),
    plot: 'After rescuing Han Solo from the palace of Jabba the Hutt, the rebels attempt to destroy the second Death Star, while Luke struggles to make Vader return from the dark side of the Force.',
    title: 'Star Wars: Episode VI - Return of the Jedi',
    scoreDetails: {
      value: 0.015388257575757576,
      description: 'value output by reciprocal rank fusion algorithm, computed as sum of (weight * (1 / (60 + rank))) across input pipelines from which this document is output, from:',
      details: [
        {
          inputPipelineName: 'fullTextPipeline',
          rank: 4,
          weight: 0.5,
          value: 2.712062358856201,
          details: []
        },
        {
          inputPipelineName: 'vectorPipeline',
          rank: 6,
          weight: 0.5,
          value: 0.7782549858093262,
          details: []
        }
      ]
    }
  },
  {
    _id: ObjectId('573a13c0f29313caabd62f62'),
    plot: 'Anakin Skywalker and Ahsoka Tano must rescue the kidnapped son of Jabba the Hutt, but political intrigue complicates their mission.',
    title: 'Star Wars: The Clone Wars',
    scoreDetails: {
      value: 0.015141165755919854,
      description: 'value output by reciprocal rank fusion algorithm, computed as sum of (weight * (1 / (60 + rank))) across input pipelines from which this document is output, from:',
      details: [
        {
          inputPipelineName: 'fullTextPipeline',
          rank: 1,
          weight: 0.5,
          value: 3.609658718109131,
          details: []
        },
        {
          inputPipelineName: 'vectorPipeline',
          rank: 12,
          weight: 0.5,
          value: 0.7561323642730713,
          details: []
        }
      ]
    }
  },
  {
    _id: ObjectId('573a139af29313caabcf124d'),
    plot: 'As the Clone Wars near an end, the Sith Lord Darth Sidious steps out of the shadows, at which time Anakin succumbs to his emotions, becoming Darth Vader and putting his relationships with Obi-Wan and Padme at risk.',
    title: 'Star Wars: Episode III - Revenge of the Sith',
    scoreDetails: {
      value: 0.014854753521126762,
      description: 'value output by reciprocal rank fusion algorithm, computed as sum of (weight * (1 / (60 + rank))) across input pipelines from which this document is output, from:',
      details: [
        {
          inputPipelineName: 'fullTextPipeline',
          rank: 4,
          weight: 0.5,
          value: 2.712062358856201,
          details: []
        },
        {
          inputPipelineName: 'vectorPipeline',
          rank: 11,
          weight: 0.5,
          value: 0.756283700466156,
          details: []
        }
      ]
    }
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