Add integration: running examples error of module not found

[cinqisap]

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Example Code

import hanaClient from '@sap/hana-client';
import { HanaDB, HanaDBArgs} from "@langchain/community/vectorstores/hanavector";
import { Document } from "@langchain/core/documents";
import { TextLoader } from "langchain/document_loaders/fs/text";
import { CharacterTextSplitter } from "langchain/text_splitter";
import { OpenAIEmbeddings } from "@langchain/openai";

Description

Hi, I am currently adding integration of the sap hana vector store, and I am in the phase of writing examples and running examples. But when I ran the code above, the error showed up:

Error: Cannot find module '/langchainjs/node_modules/langchain/document_loaders/fs/text.js' imported from /langchainjs/examples/src/indexes/vector_stores/hana_vector/fromDocs.ts
    at finalizeResolution (node:internal/modules/esm/resolve:263:11)
    at moduleResolve (node:internal/modules/esm/resolve:908:10)
    at defaultResolve (node:internal/modules/esm/resolve:1131:11)
    at nextResolve (node:internal/modules/esm/hooks:750:28)
    at u (file:///data/i572410/hana_langchain/langchainjs/node_modules/@esbuild-kit/esm-loader/dist/index.js:1:2406)
    at nextResolve (node:internal/modules/esm/hooks:750:22)
    at Hooks.resolve (node:internal/modules/esm/hooks:238:24)
    at handleMessage (node:internal/modules/esm/worker:199:18) {
  code: 'ERR_MODULE_NOT_FOUND',
  url: 'file:///langchainjs/node_modules/langchain/document_loaders/fs/text.js'
}

After I inspect the node_modules under langchainjs repo, I found the path for TextLoader is /node_modules/langchain/src/document_loaders/fs/text.ts instead of /node_modules/langchain/document_loaders/fs/text.js. I inspect whether there is a problem with installing langchain package or if the functions are not properly exported. But I couldn't solve it even by deleting node_module and running yarn several times to re-install the langcain package.

System Info

~/hana_langchain/langchainjs/langchain> yarn info langchain
└─ langchain@workspace:langchain
   ├─ Version: 0.1.25
   │
   └─ Dependencies
      ├─ @anthropic-ai/sdk@npm:^0.9.1 → npm:0.9.1
      ├─ @aws-sdk/client-s3@npm:^3.310.0 → npm:3.310.0
      ├─ @aws-sdk/client-sagemaker-runtime@npm:^3.414.0 → npm:3.427.0
      ├─ @aws-sdk/client-sfn@npm:^3.362.0 → npm:3.362.0
      ├─ @aws-sdk/credential-provider-node@npm:^3.388.0 → npm:3.388.0
      ├─ @aws-sdk/types@npm:^3.357.0 → npm:3.378.0
      ├─ @azure/storage-blob@npm:^12.15.0 → npm:12.15.0
      ├─ @cloudflare/workers-types@npm:^4.20230922.0 → npm:4.20230922.0
      ├─ @faker-js/faker@npm:^7.6.0 → npm:7.6.0
      ├─ @gomomento/sdk-core@npm:^1.51.1 → npm:1.51.1
      ├─ @gomomento/sdk@npm:^1.51.1 → npm:1.51.1
      ├─ @google-ai/generativelanguage@npm:^0.2.1 → npm:0.2.1
      ├─ @google-cloud/storage@npm:^7.7.0 → npm:7.7.0
      ├─ @jest/globals@npm:^29.5.0 → npm:29.5.0
      ├─ @langchain/core@~0.1.41 → workspace:langchain-core
      ├─ @langchain/openai@~0.0.14 → workspace:libs/langchain-openai
      ├─ @langchain/scripts@~0.0 → workspace:libs/langchain-scripts
      ├─ @notionhq/client@npm:^2.2.10 → npm:2.2.10
      ├─ @pinecone-database/pinecone@npm:^1.1.0 → npm:1.1.0
      ├─ @supabase/supabase-js@npm:^2.10.0 → npm:2.10.0
      ├─ @tsconfig/recommended@npm:^1.0.2 → npm:1.0.2
      ├─ @types/d3-dsv@npm:^2 → npm:2.0.3
      ├─ @types/decamelize@npm:^1.2.0 → npm:1.2.0
      ├─ @types/handlebars@npm:^4.1.0 → npm:4.1.0
      ├─ @types/html-to-text@npm:^9 → npm:9.0.0
      ├─ @types/js-yaml@npm:^4 → npm:4.0.5
      ├─ @types/jsdom@npm:^21.1.1 → npm:21.1.1
      ├─ @types/pdf-parse@npm:^1.1.1 → npm:1.1.1
      ├─ @types/uuid@npm:^9 → npm:9.0.1
      ├─ @types/ws@npm:^8 → npm:8.5.8
      ├─ @vercel/kv@npm:^0.2.3 → npm:0.2.3
      ├─ apify-client@npm:^2.7.1 → npm:2.7.1
      ├─ assemblyai@npm:^4.0.0 → npm:4.0.0
      ├─ axios@npm:^0.26.0 → npm:0.26.1
      ├─ binary-extensions@npm:^2.2.0 → npm:2.2.0
      ├─ cheerio@npm:^1.0.0-rc.12 → npm:1.0.0-rc.12
      ├─ chromadb@npm:^1.5.3 → npm:1.5.3
      ├─ couchbase@npm:^4.2.10 → npm:4.2.10
      ├─ d3-dsv@npm:^2.0.0 → npm:2.0.0
      ├─ dotenv@npm:^16.0.3 → npm:16.0.3
      ├─ dpdm@patch:dpdm@npm%3A3.12.0#./.yarn/patches/dpdm-npm-3.12.0-0dfdd8e3b8.patch::locator=langchainjs%40workspace%3A. → patch:dpdm@npm%3A3.12.0#./.yarn/patches/dpdm-npm-3.12.0-0dfdd8e3b8.patch::version=3.12.0&hash=2406a8&locator=langchainjs%40workspace%3A.
      ├─ epub2@npm:^3.0.1 → npm:3.0.1
      ├─ eslint-plugin-no-instanceof@npm:^1.0.1 → npm:1.0.1
      ├─ eslint@npm:^8.33.0 → npm:8.35.0
      ├─ expr-eval@npm:^2.0.2 → npm:2.0.2
      ├─ fast-xml-parser@npm:^4.2.7 → npm:4.2.7
      ├─ google-auth-library@npm:^8.9.0 → npm:8.9.0
      ├─ handlebars@npm:^4.7.8 → npm:4.7.8
      ├─ html-to-text@npm:^9.0.5 → npm:9.0.5
      ├─ ignore@npm:^5.2.0 → npm:5.2.4
      ├─ ioredis@npm:^5.3.2 → npm:5.3.2
      ├─ jest-environment-node@npm:^29.6.4 → npm:29.6.4
      ├─ js-tiktoken@npm:^1.0.7 → npm:1.0.7
      ├─ js-yaml@npm:^4.1.0 → npm:4.1.0
      ├─ jsonpointer@npm:^5.0.1 → npm:5.0.1
      ├─ langchainhub@npm:~0.0.8 → npm:0.0.8
      ├─ langsmith@npm:~0.1.7 → npm:0.1.7
      ├─ mammoth@npm:^1.5.1 → npm:1.5.1
      ├─ ml-distance@npm:^4.0.0 → npm:4.0.0
      ├─ node-llama-cpp@npm:2.7.3 → npm:2.7.3
      ├─ notion-to-md@npm:^3.1.0 → npm:3.1.0
      ├─ officeparser@npm:^4.0.4 → npm:4.0.4
      ├─ openai@npm:^4.26.1 → npm:4.26.1
      ├─ openapi-types@npm:^12.1.3 → npm:12.1.3
      ├─ p-retry@npm:4 → npm:4.6.2
      ├─ pdf-parse@npm:1.1.1 → npm:1.1.1
      ├─ peggy@npm:^3.0.2 → npm:3.0.2
      ├─ playwright@npm:^1.32.1 → npm:1.32.1
      ├─ prettier@npm:^2.8.3 → npm:2.8.4
      ├─ puppeteer@npm:^19.7.2 → npm:19.7.2
      ├─ pyodide@npm:^0.24.1 → npm:0.24.1
      ├─ redis@npm:^4.6.6 → npm:4.6.6
      ├─ release-it@npm:^15.10.1 → npm:15.10.1
      ├─ rimraf@npm:^5.0.1 → npm:5.0.1
      ├─ rollup@npm:^3.19.1 → npm:3.19.1
      ├─ sonix-speech-recognition@npm:^2.1.1 → npm:2.1.1
      ├─ srt-parser-2@npm:^1.2.3 → npm:1.2.3
      ├─ typescript@patch:typescript@~5.1.6#~builtin<compat/typescript> → patch:typescript@npm%3A5.1.6#~builtin<compat/typescript>::version=5.1.6&hash=1f5320
      ├─ uuid@npm:^9.0.0 → npm:9.0.0
      ├─ weaviate-ts-client@npm:^2.0.0 → npm:2.0.0
      ├─ web-auth-library@npm:^1.0.3 → npm:1.0.3
      ├─ wikipedia@npm:^2.1.2 → npm:2.1.2
      ├─ yaml@npm:^2.2.1 → npm:2.2.1
      ├─ youtube-transcript@npm:^1.0.6 → npm:1.0.6
      ├─ youtubei.js@npm:^9.1.0 → npm:9.1.0
      ├─ zod@npm:^3.22.4 → npm:3.22.4
      ├─ @langchain/community@~0.0.33 → workspace:libs/langchain-community [1541e]
      ├─ @swc/core@npm:^1.3.90 → npm:1.3.90 [6dbfd]
      ├─ @swc/jest@npm:^0.2.29 → npm:0.2.29 [6dbfd]
      ├─ @typescript-eslint/eslint-plugin@npm:^5.58.0 → npm:5.58.0 [cedfb]
      ├─ @typescript-eslint/parser@npm:^5.58.0 → npm:5.58.0 [cedfb]
      ├─ @xata.io/client@npm:^0.28.0 → npm:0.28.0 [cedfb]
      ├─ convex@npm:^1.3.1 → npm:1.3.1 [cedfb]
      ├─ eslint-config-airbnb-base@npm:^15.0.0 → npm:15.0.0 [cedfb]
      ├─ eslint-config-prettier@npm:^8.6.0 → npm:8.7.0 [6dbfd]
      ├─ eslint-plugin-import@npm:^2.27.5 → npm:2.27.5 [cedfb]
      ├─ eslint-plugin-jest@npm:^27.6.0 → npm:27.6.0 [cedfb]
      ├─ eslint-plugin-prettier@npm:^4.2.1 → npm:4.2.1 [6dbfd]
      ├─ jest@npm:^29.5.0 → npm:29.5.0 [6dbfd]
      ├─ jsdom@npm:^22.1.0 → npm:22.1.0 [cedfb]
      ├─ mongodb@npm:^5.2.0 → npm:5.2.0 [cedfb]
      ├─ ts-jest@npm:^29.1.0 → npm:29.1.0 [6dbfd]
      ├─ typeorm@npm:^0.3.12 → npm:0.3.12 [1541e]
      └─ zod-to-json-schema@npm:^3.22.3 → npm:3.22.3 [221f6]

platform: linux

~/hana_langchain/langchainjs/langchain> node -v
v21.6.2
~/hana_langchain/langchainjs/langchain> yarn -v
3.4.1

[dosubot[bot]]

Hey @cinqisap, long time no code! Hope you've been well amidst all these semicolons and curly braces.

Based on the error message you provided, it seems like the issue might be arising due to incorrect import paths or a misconfiguration in how TypeScript or JavaScript files are being resolved in your project. Here are a few things you could check:

1. TypeScript Compilation: Ensure that your TypeScript is being correctly compiled to JavaScript. The langchain package seems to be written in TypeScript, so you need to compile these TypeScript files into JavaScript. This is typically done via a build script in your package.json file. Given the scripts section you provided, running yarn build should compile the TypeScript files to JavaScript.

2. Correct Import Paths: Verify that your import statements in your code are using the correct paths. If you're directly importing TextLoader, the path should reflect the compiled JavaScript files' location, typically under a dist or build directory, depending on how the project is configured. The correct import path for the TextLoader module in the LangChain JS codebase is @langchain/document_loaders/fs/text as per the source code.

3. Module Resolution Configuration: Check your TypeScript configuration (usually in tsconfig.json) to ensure that module resolution is correctly set up. You might need to adjust the baseUrl or paths to correctly resolve modules from the node_modules directory.

4. Package Version Mismatch: There's a version mismatch in your context; you mentioned using Langchain version 0.1.25, but the package.json you provided is for version 0.1.28. Ensure that you are using the correct version of the langchain package. If necessary, update your package to match the version in your package.json by running yarn upgrade [email protected] or the appropriate version.

5. Node.js and Yarn Versions: Although less likely to be the cause, discrepancies in Node.js or Yarn versions can sometimes lead to unexpected behavior. Your versions seem to be up to date, but ensure they are compatible with the langchain package requirements.

Regarding similar issues in the LangChain JS repository, there were two closed issues that might be related to your problem. The first one, Multiple modules error, was resolved by adjusting the webpack configuration. The second one, Issue importing submodules using es6 module import from documentation, was resolved by updating to a newer version of the LangChain JS framework.

If after checking these points the issue persists, please provide more details about your setup and the steps you've taken so far. This will help in identifying the root cause of the problem.

Sources

• Multiple modules error
• Issue importing submodules using es6 module import from documentation
• langchain/package.json
• langchain/src/document_loaders/fs/text.ts

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