如何为向量搜索建立索引字段

1
{
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    "database": "sample_mflix",
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    "collectionName": "embedded_movies",
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    "type": "vectorSearch",
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    "name": "vector_index",
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    "fields": [ 
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      {
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        "type": "vector",
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        "path": "plot_embedding_voyage_3_large",
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        "numDimensions": 2048,
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        "similarity": "dotProduct"
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      }
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    ]
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}

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{
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    "database": "sample_mflix",
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    "collectionName": "embedded_movies",
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    "type": "vectorSearch",
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    "name": "vector_index",
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    "fields":[ 
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      {
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        "type": "vector",
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        "path": "plot_embedding_voyage_3_large",
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        "numDimensions": 2048,
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        "similarity": "dotProduct"
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      },
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      {
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        "type": "filter",
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        "path": "genres"
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      },
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      {
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        "type": "filter",
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        "path": "year"
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      }
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    ]
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}

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db.embedded_movies.createSearchIndex(
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  "vector_index", 
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  "vectorSearch", 
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  {
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    "fields": [
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      {
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        "type": "vector",
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        "path": "plot_embedding_voyage_3_large",
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        "numDimensions": 2048,
10
        "similarity": "dotProduct",
11
        "quantization": "scalar"
12
      }
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    ]
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  }
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);

1
db.embedded_movies.createSearchIndex(
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  "vector_index", 
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  "vectorSearch", 
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  {
5
    "fields": [
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      {
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        "type": "vector",
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        "path": "plot_embedding_voyage_3_large",
9
        "numDimensions": 2048,
10
        "similarity": "dotProduct"
11
      },
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      {
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        "type": "filter",
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        "path": "genres"
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      },
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      {
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        "type": "filter",
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        "path": "year"
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      }
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    ]
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  }
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);

1
namespace query_quick_start;
2
3
using MongoDB.Bson;
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using MongoDB.Driver;
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using System;
6
using System.Threading;
7
8
public class IndexService
9
{
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    // Replace the placeholder with your Atlas connection string
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    private const string MongoConnectionString = "<connectionString>";
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    public void CreateVectorIndex()
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    {
14
        try
15
        {
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            // Connect to your Atlas cluster
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            var client = new MongoClient(MongoConnectionString);
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            var database = client.GetDatabase("sample_mflix");
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            var collection = database.GetCollection<BsonDocument>("embedded_movies");
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            var searchIndexView = collection.SearchIndexes;
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            var name = "vector_index";
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            var type = SearchIndexType.VectorSearch;
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            var definition = new BsonDocument
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            {
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                { "fields", new BsonArray
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                    {
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                        new BsonDocument
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                        {
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                            { "type", "vector" },
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                            { "path", "plot_embedding_voyage_3_large" },
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                            { "numDimensions", 2048 },
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                            { "similarity", "dotProduct" },
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                            { "quantization", "scalar" }
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                        }
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                    }
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                }
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            };
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            var model = new CreateSearchIndexModel(name, type, definition);
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            searchIndexView.CreateOne(model);
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            Console.WriteLine($"New search index named {name} is building.");
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            // Polling for index status
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            Console.WriteLine("Polling to check if the index is ready. This may take up to a minute.");
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            bool queryable = false;
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            while (!queryable)
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            {
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                var indexes = searchIndexView.List();
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                foreach (var index in indexes.ToEnumerable())
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                {
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                    if (index["name"] == name)
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                    {
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                        queryable = index["queryable"].AsBoolean;
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                    }
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                }
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                if (!queryable)
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                {
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                    Thread.Sleep(5000);
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                }
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            }
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            Console.WriteLine($"{name} is ready for querying.");
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        }
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        catch (Exception e)
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        {
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            Console.WriteLine($"Exception: {e.Message}");
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        }
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    }
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}

1
namespace query_quick_start;
2
3
using MongoDB.Bson;
4
using MongoDB.Driver;
5
using System;
6
using System.Threading;
7
8
public class IndexService
9
{
10
    // Replace the placeholder with your Atlas connection string
11
    private const string MongoConnectionString = "<connection-string>";
12
    public void CreateVectorIndex()
13
    {
14
        try
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        {
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            // Connect to your Atlas cluster
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            var client = new MongoClient(MongoConnectionString);
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            var database = client.GetDatabase("sample_mflix");
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            var collection = database.GetCollection<BsonDocument>("embedded_movies");
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            var searchIndexView = collection.SearchIndexes;
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            var name = "vector_index";
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            var type = SearchIndexType.VectorSearch;
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            var definition = new BsonDocument
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            {
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                { "fields", new BsonArray
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                    {
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                        new BsonDocument
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                        {
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                            { "type", "vector" },
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                            { "path", "plot_embedding_voyage_3_large" },
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                            { "numDimensions", 2048 },
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                            { "similarity", "dotProduct" },
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                            { "quantization", "scalar"}
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                        },
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                        new BsonDocument
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                        {
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                            {"type", "filter"},
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                            {"path", "genres"}
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                        },
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                        new BsonDocument
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                        {
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                            {"type", "filter"},
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                            {"path", "year"}
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                        }
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                    }
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                }
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            };
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            var model = new CreateSearchIndexModel(name, type, definition);
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            searchIndexView.CreateOne(model);
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            Console.WriteLine($"New search index named {name} is building.");
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            // Polling for index status
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            Console.WriteLine("Polling to check if the index is ready. This may take up to a minute.");
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            bool queryable = false;
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            while (!queryable)
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            {
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                var indexes = searchIndexView.List();
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                foreach (var index in indexes.ToEnumerable())
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                {
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                    if (index["name"] == name)
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                    {
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                        queryable = index["queryable"].AsBoolean;
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                    }
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                }
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                if (!queryable)
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                {
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                    Thread.Sleep(5000);
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                }
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            }
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            Console.WriteLine($"{name} is ready for querying.");
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        }
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        catch (Exception e)
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        {
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            Console.WriteLine($"Exception: {e.Message}");
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        }
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    }
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}

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package main
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3
import (
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	"context"
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	"fmt"
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	"log"
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	"time"
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	"go.mongodb.org/mongo-driver/v2/bson"
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	"go.mongodb.org/mongo-driver/v2/mongo"
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	"go.mongodb.org/mongo-driver/v2/mongo/options"
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)
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func main() {
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	ctx := context.Background()
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	// Replace the placeholder with your Atlas connection string
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	const uri = "<connectionString>"
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	// Connect to your Atlas cluster
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	clientOptions := options.Client().ApplyURI(uri)
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	client, err := mongo.Connect(clientOptions)
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	if err != nil {
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		log.Fatalf("failed to connect to the server: %v", err)
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	}
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	defer func() { _ = client.Disconnect(ctx) }()
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	// Set the namespace
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	coll := client.Database("sample_mflix").Collection("embedded_movies")
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	// Define the index details
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	type vectorDefinitionField struct {
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		Type          string `bson:"type"`
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		Path          string `bson:"path"`
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		NumDimensions int    `bson:"numDimensions"`
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		Similarity    string `bson:"similarity"`
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		Quantization  string `bson:"quantization"`
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	}
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	type vectorDefinition struct {
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		Fields []vectorDefinitionField `bson:"fields"`
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	}
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	indexName := "vector_index"
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	opts := options.SearchIndexes().SetName(indexName).SetType("vectorSearch")
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	indexModel := mongo.SearchIndexModel{
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		Definition: vectorDefinition{
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			Fields: []vectorDefinitionField{{
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				Type:          "vector",
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				Path:          "plot_embedding_voyage_3_large",
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				NumDimensions: 2048,
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				Similarity:    "dotProduct",
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				Quantization:  "scalar"}},
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		},
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		Options: opts,
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	}
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	// Create the index
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	searchIndexName, err := coll.SearchIndexes().CreateOne(ctx, indexModel)
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	if err != nil {
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		log.Fatalf("failed to create the search index: %v", err)
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	}
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	log.Println("New search index named " + searchIndexName + " is building.")
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	// Await the creation of the index.
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	log.Println("Polling to check if the index is ready. This may take up to a minute.")
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	searchIndexes := coll.SearchIndexes()
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	var doc bson.Raw
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	for doc == nil {
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		cursor, err := searchIndexes.List(ctx, options.SearchIndexes().SetName(searchIndexName))
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		if err != nil {
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			fmt.Errorf("failed to list search indexes: %w", err)
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		}
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		if !cursor.Next(ctx) {
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			break
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		}
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		name := cursor.Current.Lookup("name").StringValue()
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		queryable := cursor.Current.Lookup("queryable").Boolean()
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		if name == searchIndexName && queryable {
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			doc = cursor.Current
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		} else {
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			time.Sleep(5 * time.Second)
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		}
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	}
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	log.Println(searchIndexName + " is ready for querying.")
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}

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package main
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3
import (
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	"context"
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	"fmt"
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	"log"
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	"time"
8
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	"go.mongodb.org/mongo-driver/v2/bson"
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	"go.mongodb.org/mongo-driver/v2/mongo"
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	"go.mongodb.org/mongo-driver/v2/mongo/options"
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)
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func main() {
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	ctx := context.Background()
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	// Replace the placeholder with your Atlas connection string
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	const uri = "<connectionString>"
19
20
	// Connect to your Atlas cluster
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	clientOptions := options.Client().ApplyURI(uri)
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	client, err := mongo.Connect(clientOptions)
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	if err != nil {
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		log.Fatalf("failed to connect to the server: %v", err)
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	}
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	defer func() { _ = client.Disconnect(ctx) }()
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	// Set the namespace
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	coll := client.Database("sample_mflix").Collection("embedded_movies")
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	indexName := "vector_index"
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	opts := options.SearchIndexes().SetName(indexName).SetType("vectorSearch")
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	type vectorDefinitionField struct {
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		Type          string `bson:"type"`
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		Path          string `bson:"path"`
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		NumDimensions int    `bson:"numDimensions"`
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		Similarity    string `bson:"similarity"`
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		Quantization  string `bson:"quantization"`
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	}
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	type filterField struct {
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		Type string `bson:"type"`
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		Path string `bson:"path"`
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	}
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	type indexDefinition struct {
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		Fields []vectorDefinitionField `bson:"fields"`
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	}
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	vectorDefinition := vectorDefinitionField{
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		Type:          "vector",
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		Path:          "plot_embedding_voyage_3_large",
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		NumDimensions: 2048,
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		Similarity:    "dotProduct",
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		Quantization:  "scalar"}
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	genreFilterDefinition := filterField{"filter", "genres"}
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	yearFilterDefinition := filterField{"filter", "year"}
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	indexModel := mongo.SearchIndexModel{
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		Definition: bson.D{{Key: "fields", Value: [3]interface{}{
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			vectorDefinition,
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			genreFilterDefinition,
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			yearFilterDefinition}}},
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		Options: opts,
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	}
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	// Create the index
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	searchIndexName, err := coll.SearchIndexes().CreateOne(ctx, indexModel)
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	if err != nil {
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		log.Fatalf("failed to create the search index: %v", err)
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	}
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	log.Println("New search index named " + searchIndexName + " is building.")
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	// Await the creation of the index.
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	log.Println("Polling to check if the index is ready. This may take up to a minute.")
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	searchIndexes := coll.SearchIndexes()
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	var doc bson.Raw
78
	for doc == nil {
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		cursor, err := searchIndexes.List(ctx, options.SearchIndexes().SetName(searchIndexName))
80
		if err != nil {
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			fmt.Errorf("failed to list search indexes: %w", err)
82
		}
83
84
		if !cursor.Next(ctx) {
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			break
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		}
87
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		name := cursor.Current.Lookup("name").StringValue()
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		queryable := cursor.Current.Lookup("queryable").Boolean()
90
		if name == searchIndexName && queryable {
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			doc = cursor.Current
92
		} else {
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			time.Sleep(5 * time.Second)
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		}
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	}
96
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	log.Println(searchIndexName + " is ready for querying.")
98
}

1
const { MongoClient } = require("mongodb");
2
3
// connect to your Atlas deployment
4
const uri =  "<connectionString>";
5
6
const client = new MongoClient(uri);
7
8
async function run() {
9
   try {
10
     const database = client.db("sample_mflix");
11
     const collection = database.collection("embedded_movies");
12
    
13
     // define your MongoDB Vector Search index
14
     const index = {
15
         name: "vector_index",
16
         type: "vectorSearch",
17
         definition: {
18
           "fields": [
19
             {
20
               "type": "vector",
21
               "numDimensions": 2048,
22
               "path": "plot_embedding_voyage_3_large",
23
               "similarity": "dotProduct",
24
               "quantization": "scalar"
25
             }
26
           ]
27
         }
28
     }
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30
     // run the helper method
31
     const result = await collection.createSearchIndex(index);
32
     console.log(`New search index named ${result} is building.`);
33
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     // wait for the index to be ready to query
35
     console.log("Polling to check if the index is ready. This may take up to a minute.")
36
     let isQueryable = false;
37
     while (!isQueryable) {
38
       const cursor = collection.listSearchIndexes();
39
       for await (const index of cursor) {
40
         if (index.name === result) {
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           if (index.queryable) {
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             console.log(`${result} is ready for querying.`);
43
             isQueryable = true;
44
           } else {
45
             await new Promise(resolve => setTimeout(resolve, 5000));
46
           }
47
         }
48
       }
49
     }
50
   } finally {
51
     await client.close();
52
   }
53
}
54
run().catch(console.dir);

1
const { MongoClient } = require("mongodb");
2
3
// connect to your Atlas deployment
4
const uri =  "<connectionString>";
5
6
const client = new MongoClient(uri);
7
8
async function run() {
9
   try {
10
     const database = client.db("sample_mflix");
11
     const collection = database.collection("embedded_movies");
12
    
13
     // define your MongoDB Vector Search index
14
     const index = {
15
         name: "vector_index",
16
         type: "vectorSearch",
17
         definition: {
18
           "fields": [
19
             {
20
               "type": "vector",
21
               "numDimensions": 2048,
22
               "path": "plot_embedding_voyage_3_large",
23
               "similarity": "dotProduct",
24
               "quantization": "scalar"
25
             },
26
             {
27
               "type": "filter",
28
               "path": "genres"
29
             },
30
             {
31
               "type": "filter",
32
               "path": "year"
33
             }
34
           ]
35
         }
36
     }
37
38
     // run the helper method
39
     const result = await collection.createSearchIndex(index);
40
     console.log(`New search index named ${result} is building.`);
41
42
     // wait for the index to be ready to query
43
     console.log("Polling to check if the index is ready. This may take up to a minute.")
44
     let isQueryable = false;
45
     while (!isQueryable) {
46
       const cursor = collection.listSearchIndexes();
47
       for await (const index of cursor) {
48
         if (index.name === result) {
49
           if (index.queryable) {
50
             console.log(`${result} is ready for querying.`);
51
             isQueryable = true;
52
           } else {
53
             await new Promise(resolve => setTimeout(resolve, 5000));
54
           }
55
         }
56
       }
57
     }
58
   } finally {
59
     await client.close();
60
   }
61
}
62
run().catch(console.dir);