forked from sheetjs/docs.sheetjs.com
44 lines
1.5 KiB
JavaScript
44 lines
1.5 KiB
JavaScript
import { ChatOllama, OllamaEmbeddings } from "@langchain/ollama";
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import { MemoryVectorStore } from "langchain/vectorstores/memory";
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import { SelfQueryRetriever } from "langchain/retrievers/self_query";
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import { FunctionalTranslator } from "@langchain/core/structured_query";
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import LoadOfSheet from "./loadofsheet.mjs";
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let s = 0, spin = ['\\', '|', '/', '-'];
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setInterval(() => { process.stderr.write(spin[s = ++s % spin.length] + '\u001b[0G'); }, 100).unref();
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process.on('exit', function() { process.stderr.write('\u001b[2K'); });
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const model = "llama3-chatqa:8b-v1.5-q8_0";
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console.log(`Using model ${model}`);
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const llm = new ChatOllama({ baseUrl: "http://127.0.0.1:11434", model });
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const embeddings = new OllamaEmbeddings({model});
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console.time("load of sheet");
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const loader = new LoadOfSheet("./cd.xls");
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const docs = await loader.load();
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console.timeEnd("load of sheet");
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console.time("vector store");
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const vectorStore = await MemoryVectorStore.fromDocuments(docs, embeddings);
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console.timeEnd("vector store");
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console.time("query");
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const selfQueryRetriever = SelfQueryRetriever.fromLLM({
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llm,
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vectorStore,
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documentContents: "Data rows from a worksheet",
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attributeInfo: loader.attributes,
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structuredQueryTranslator: new FunctionalTranslator(),
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searchParams: { k: 1024 } // default is 4
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});
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const res = await selfQueryRetriever.invoke(
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"Which rows have over 40 miles per gallon?"
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);
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console.timeEnd("query");
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res.forEach(({metadata}) => { console.log({ Name: metadata.Name, MPG: metadata.Miles_per_Gallon }); });
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