Deleting data points in qDrant DB

Question

I am trying to delete all the data points that are associated with a particular email Id, but I am encountering the following error.

source code:

app.get('/cleanUpResources', async (req, res) => {
    const _id = req.query.email;
    const embeddings = new VertexAIEmbeddings({
        model: "text-embedding-004",
    });

    const vectorStore = await QdrantVectorStore.fromExistingCollection(embeddings, {
        url: <url>,
        apiKey: <api-key>,
        collectionName: 'pdf-docs',
    });

    // Delete all points with payload field 'id' equal to req.body.email
    await vectorStore.delete({
        filter: {
            must: [
                {
                    key: "id",
                    match: { value: JSON.stringify(_id) },
                },
            ],
        },
    });

    return res.json({ message: `Deleted all points with id: ${id}` });
})

Error:

Error: Bad Request
    at Object.fun [as deletePoints] (file:///C:/Users/abhis/OneDrive/Desktop/PROJECTS/PDF-RAG/server/node_modules/@qdrant/openapi-typescript-fetch/dist/esm/fetcher.js:169:23)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async QdrantClient.delete (file:///C:/Users/abhis/OneDrive/Desktop/PROJECTS/PDF-RAG/server/node_modules/@qdrant/js-client-rest/dist/esm/qdrant-client.js:628:26)
    at async QdrantVectorStore.delete (file:///C:/Users/abhis/OneDrive/Desktop/PROJECTS/PDF-RAG/server/node_modules/@langchain/qdrant/dist/vectorstores.js:140:13)
    at async file:///C:/Users/abhis/OneDrive/Desktop/PROJECTS/PDF-RAG/server/app.js:73:5

qDrant DB Collection structure:

metadata: {
"source":"uploads\1753380027445-401326695-CT20244465298_Appl…"
"pdf":{}
"loc":{}
"id":"<email_address>"
}

I have also gone through the documentation but not able to debug this. https://v03.api.js.langchain.com/classes/_langchain_qdrant.QdrantVectorStore.html#delete

https://qdrant.tech/documentation/concepts/points/#delete-points

Anush · Accepted Answer · 2025-07-25 06:45:50Z

1

Can you please confirm that req.query.email is not undefined? That’s likely why JSON.stringify(_id) is also returning undefined.

Note that the id is nested within the metadata object. So the key should be metadata.id, as per https://qdrant.tech/documentation/concepts/filtering/#nested-key.

Also, you don't need to use JSON.stringify if the input is already a string. It will wrap the string in extra quotes and not match the points.

edited Jul 25 at 6:45

answered Jul 25 at 6:33

Anush

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3 Comments

Abhishek Prasad Jul 28 at 8:30

Yes the req.query.email is not undefined, and I have also changed the key to metadata.id, I am getting this error: Error: Bad Request at Object.fun [as deletePoints] (file:///C:/Users/abhis/OneDrive/Desktop/PROJECTS/PDF-RAG/server/node_modules/@qdrant/openapi-typescript-fetch/dist/esm/fetcher.js:169:23) at process.processTicksAndRejections (node:internal/process/task_queues:95:5) at async QdrantClient.delete (file:///C:/Users/abhis/OneDrive/Desktop/PROJECTS/PDF-

Anush Jul 28 at 9:25

I tried a request same as yours and could get a similar error only with JSON.stringify(_id) returning undefined.

Anush Jul 28 at 9:26

I recommend you log the entire delete request object to inspect.

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