61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
package service
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import (
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"context"
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"fmt"
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"rag/common/eino"
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"rag/model/dto"
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"github.com/cloudwego/eino/components/retriever"
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"github.com/cloudwego/eino/schema"
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"github.com/gogf/gf/v2/os/glog"
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"github.com/gogf/gf/v2/util/gconv"
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)
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var RAGQuery = new(ragQueryService)
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type ragQueryService struct{}
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// Query 执行RAG查询
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func (s *ragQueryService) Query(ctx context.Context, req *dto.RAGQueryReq) (*dto.RAGQueryRes, error) {
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if req.TopK <= 0 {
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req.TopK = 5
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}
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// 4. 使用向量检索器进行查询
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r, err := eino.NewPGVectorRetriever(&eino.PGVectorRetrieverConfig{
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Embedder: eino.EmbedderDashscope,
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DefaultTopK: req.TopK,
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})
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if err != nil {
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glog.Errorf(ctx, "初始化向量检索器失败: %v", err)
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return nil, fmt.Errorf("初始化向量检索器失败: %w", err)
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}
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// 5. 执行向量检索
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docs, err := r.Retrieve(ctx, req.Content, retriever.WithEmbedding(eino.EmbedderDashscope), retriever.WithDSLInfo(map[string]any{
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"dataset_ids": req.DatasetIds,
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}))
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if err != nil {
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glog.Errorf(ctx, "向量检索失败: %v", err)
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return nil, fmt.Errorf("向量检索失败: %w", err)
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}
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messages := make([]*schema.Message, 0)
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err = gconv.Struct(req.History, &messages)
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if err != nil {
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glog.Errorf(ctx, "转换历史消息失败: %v", err)
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return nil, fmt.Errorf("转换历史消息失败: %w", err)
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}
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replyMsg, err := eino.NewChatModel(ctx, req.Content, docs, messages)
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if err != nil {
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glog.Errorf(ctx, "向量检索失败: %v", err)
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return nil, fmt.Errorf("向量检索失败: %w", err)
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}
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return &dto.RAGQueryRes{
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Answer: replyMsg.Content,
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}, nil
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}
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