Error starting N8N with my custom AI Vector Store Node

mr-good-bye · December 14, 2023, 3:23pm

Description of the problem/error/question

I have made Qdrant node from pinecone node. I followed most of the steps in guide. I have succesfully linted and built my node. Than I linked it to ~/.n8n/custom. But nothing works
I tried copying folders like ‘utils’ and ‘shared’ into my node dir so dependencies are solved. Than I tried to move all files into my node/NodeName dir. So that did not change anything either.

Source code is available at github

Error message

When I “n8n start” there’s next message:

C:\Users\Lanity\.n8n\custom>n8n start
Initializing n8n process
Error loading node "gonzales" from: "C:/Users/Lanity/.n8n/custom/node_modules/n8n-nodes-qdrant/node_modules/csso/lib/gonzales.cssp.node.js" - require(...).gonzales is not a constructor
evalmachine.<anonymous>:1
new (require('C:/Users/Lanity/.n8n/custom/node_modules/n8n-nodes-qdrant/node_modules/csso/lib/gonzales.cssp.node.js').gonzales)()
^

TypeError: require(...).gonzales is not a constructor
    at evalmachine.<anonymous>:1:1
    at Script.runInContext (node:vm:134:12)
    at loadClassInIsolation (C:\Users\Lanity\AppData\Roaming\nvm\v18.19.0\node_modules\n8n\node_modules\n8n-core\src\ClassLoader.ts:9:16)
    at CustomDirectoryLoader.loadNodeFromFile (C:\Users\Lanity\AppData\Roaming\nvm\v18.19.0\node_modules\n8n\node_modules\n8n-core\src\DirectoryLoader.ts:83:35)
    at CustomDirectoryLoader.loadAll (C:\Users\Lanity\AppData\Roaming\nvm\v18.19.0\node_modules\n8n\node_modules\n8n-core\src\DirectoryLoader.ts:304:9)
    at LoadNodesAndCredentials.runDirectoryLoader (C:\Users\Lanity\AppData\Roaming\nvm\v18.19.0\node_modules\n8n\src\LoadNodesAndCredentials.ts:257:3)
    at LoadNodesAndCredentials.loadNodesFromCustomDirectories (C:\Users\Lanity\AppData\Roaming\nvm\v18.19.0\node_modules\n8n\src\LoadNodesAndCredentials.ts:175:4)
    at LoadNodesAndCredentials.init (C:\Users\Lanity\AppData\Roaming\nvm\v18.19.0\node_modules\n8n\src\LoadNodesAndCredentials.ts:94:3)
    at Start.init (C:\Users\Lanity\AppData\Roaming\nvm\v18.19.0\node_modules\n8n\src\commands\BaseCommand.ts:52:3)
    at Start.init (C:\Users\Lanity\AppData\Roaming\nvm\v18.19.0\node_modules\n8n\src\commands\start.ts:209:3)
Error: Exiting due to an error.
TypeError: require(...).gonzales is not a constructor

Before that there was another similar error which was mostly like this but “require(…).isomorphic is not a constructor”. That error was solved by adding isomorphic npm package to node packahe

Main question

I do not have lots of experience in JS. So
My question is what could be wrong? Where I should look for solutions?

Information on system and setup

node 18.19.0
npm 10.2.3

n8n-nodes-langchain 0.6.0

n8n version: 1.21.0
Database (default: SQLite): SQLite
n8n EXECUTIONS_PROCESS setting (default: own, main): Do not start)
Running n8n via (Docker, npm, n8n cloud, desktop app): npm
Operating system: Windows 11

n8n · December 14, 2023, 3:23pm

It looks like your topic is missing some important information. Could you provide the following if applicable.

n8n version:
Database (default: SQLite):
n8n EXECUTIONS_PROCESS setting (default: own, main):
Running n8n via (Docker, npm, n8n cloud, desktop app):
Operating system:

Jon · December 14, 2023, 4:04pm

Hey @mr-good-bye,

Welcome to the community

There are some issues in your package.json

"dependencies": {
    "@gxl/epub-parser": "^2.0.4",
    "@n8n/n8n-nodes-langchain": "^0.6.0",
    "@qdrant/js-client-rest": "^1.7.0",
    "gonzales": "^1.0.7",
    "gonzales-pe": "^4.3.0",
    "isomorphic": "^0.0.11",
    "langchain": "^0.0.203",
    "n8n": "^1.21.0"
  }

You should only include the dependencies that your node needs so changes are it won’t need n8n, n8n-nodes-langchain or langchain as we already use those so you could make them dev dependencies instead.

It then looks like there could be an issue loading gonzales sadly I am not familiar with that package but looking at the docs for it gonzales-pe seems to be a replacement for it so you may not need to include that either.

mr-good-bye · December 14, 2023, 4:23pm

Such thing is - I don’t use gonzales in my node, I can’t explain why, when and how it appears to be a dependency

Jon · December 14, 2023, 4:34pm

Did you maybe run npm i gonzales or something?

mr-good-bye · December 14, 2023, 4:39pm

Yeah! I tried to resolve “gonzales not a constructor” like I resolved “isomorphic not a constructor”. Now I am removing gonzales and isomorphic, because it is packages I did not use, than I will try running again and share results. Just in 5 minutes

mr-good-bye · December 14, 2023, 4:45pm

C:\Users\Lanity\.n8n\custom>n8n start
Initializing n8n process
Error loading node "isomorphic" from: "C:/Users/Lanity/.n8n/custom/node_modules/n8n-nodes-qdrant/node_modules/@jsdevtools/ono/cjs/isomorphic.node.js" - require(...).isomorphic is not a constructor
evalmachine.<anonymous>:1
new (require('C:/Users/Lanity/.n8n/custom/node_modules/n8n-nodes-qdrant/node_modules/@jsdevtools/ono/cjs/isomorphic.node.js').isomorphic)()
^

TypeError: require(...).isomorphic is not a constructor
    at evalmachine.<anonymous>:1:1
    at Script.runInContext (node:vm:134:12)
    at loadClassInIsolation (C:\Users\Lanity\AppData\Roaming\nvm\v18.19.0\node_modules\n8n\node_modules\n8n-core\src\ClassLoader.ts:9:16)
    at CustomDirectoryLoader.loadNodeFromFile (C:\Users\Lanity\AppData\Roaming\nvm\v18.19.0\node_modules\n8n\node_modules\n8n-core\src\DirectoryLoader.ts:83:35)
    at CustomDirectoryLoader.loadAll (C:\Users\Lanity\AppData\Roaming\nvm\v18.19.0\node_modules\n8n\node_modules\n8n-core\src\DirectoryLoader.ts:304:9)
    at LoadNodesAndCredentials.runDirectoryLoader (C:\Users\Lanity\AppData\Roaming\nvm\v18.19.0\node_modules\n8n\src\LoadNodesAndCredentials.ts:257:3)
    at LoadNodesAndCredentials.loadNodesFromCustomDirectories (C:\Users\Lanity\AppData\Roaming\nvm\v18.19.0\node_modules\n8n\src\LoadNodesAndCredentials.ts:175:4)
    at LoadNodesAndCredentials.init (C:\Users\Lanity\AppData\Roaming\nvm\v18.19.0\node_modules\n8n\src\LoadNodesAndCredentials.ts:94:3)
    at Start.init (C:\Users\Lanity\AppData\Roaming\nvm\v18.19.0\node_modules\n8n\src\commands\BaseCommand.ts:52:3)
    at Start.init (C:\Users\Lanity\AppData\Roaming\nvm\v18.19.0\node_modules\n8n\src\commands\start.ts:209:3)
Error: Exiting due to an error.
TypeError: require(...).isomorphic is not a constructor

This is what I get without isomorphic and gonzales in dependencies and it is what I started with after I’ve built my node first time. If I add isomorphic package there is problem with gonzales not a constructor. Can you maybe point out some community-nodes which use n8n-nodes-langchain and n8n@ai-beta where I can look for a solution?

Jon · December 15, 2023, 9:56am

Hey @mr-good-bye,

That looks like there is still a project issue of some kind, There are 2 community nodes that build on top of the langchain options the second one does have the source available.

mr-good-bye · December 15, 2023, 2:44pm

Are updates for langchain nodes in plan? Will there be qdrant integration? Maybe I can somehow try to add my node to official n8n-nodes-langchain package?

Anush · December 15, 2023, 3:02pm

Hey there. We at Qdrant are planning to build an N8N integration. Will update you on how that goes.

Anush · December 21, 2023, 6:15pm

A PR is up to add Qdrant as a supported vectorstore.

Anush · December 21, 2023, 6:16pm

Jon · January 9, 2024, 3:12pm

To close the loop on this one this was release in 1.23.0, Thanks for the work you did on this @Anush

mr-good-bye · January 9, 2024, 3:41pm

That’s great. Already tried that today. Big thanks, @Anush.

system · January 16, 2024, 3:41pm

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