How to add prefix for document id in haystack

I want to upsert vectors in pinecone with prefix id for my documents in haystack. How can I achieve that. I just need this to delete my documents from pinecone with meta filtering.but, for serverles index isn’t possible. WHY???
Anyway,
Here is my current pipeline
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from haystack import Document
from haystack import Pipeline
from haystack.components.embedders import SentenceTransformersTextEmbedder, SentenceTransformersDocumentEmbedder

from haystack.components.converters import TikaDocumentConverter

from haystack.components.preprocessors import DocumentCleaner,DocumentSplitter

from haystack.components.writers import DocumentWriter

from haystack_integrations.components.retrievers.pinecone import PineconeEmbeddingRetriever

from haystack_integrations.document_stores.pinecone import PineconeDocumentStore

from haystack.components.builders import DynamicChatPromptBuilder

from haystack_integrations.components.generators.google_ai import GoogleAIGeminiChatGenerator

from haystack.components.joiners import DocumentJoiner

from dotenv import load_dotenv

from haystack.document_stores.in_memory import InMemoryDocumentStore

from pathlib import Path

from haystack.document_stores.types import DuplicatePolicy

load_dotenv()

text_embedder = SentenceTransformersDocumentEmbedder(model="sentence-transformers/all-mpnet-base-v2")

text_embedder.warm_up()

document_joiner = DocumentJoiner()

# Make sure you have the PINECONE_API_KEY environment variable set

document_store = PineconeDocumentStore(

index="ulf",

namespace="ulf_user_1",

dimension=768,

metric="cosine",

spec={"serverless": {"region": "us-east-1", "cloud": "aws"}})

# document_store = InMemoryDocumentStore()

retriever = PineconeEmbeddingRetriever(document_store=document_store)

document_cleaner = DocumentCleaner()

converter = TikaDocumentConverter()

sources = ['data/Banking Laws In India.pdf']

pipeline = Pipeline()

pipeline.add_component("converter", TikaDocumentConverter())

pipeline.add_component("cleaner", DocumentCleaner())

pipeline.add_component("splitter", DocumentSplitter(split_by="passage", split_length=1,split_overlap= 0))

pipeline.add_component("text_embedder", text_embedder)

pipeline.add_component("writer", DocumentWriter(document_store=document_store, policy=DuplicatePolicy.SKIP))

# pipeline.add_component("document_joiner",document_joiner)

# pipeline.add_component("retriever", retriever)

# pipeline.add_component("prompt_builder", prompt_builder)

# pipeline.add_component("generator", llm)

pipeline.connect("converter", "cleaner")

pipeline.connect("cleaner", "splitter")

pipeline.connect("splitter", "text_embedder")

pipeline.connect("text_embedder",'writer')

result = pipeline.run({"converter": {"sources": sources}}, include_outputs_from={"splitter"})

print("result", result)"

Hi @bhuvan.webosmotic, and welcome to the Pinecone community forums!

Thank you for your question.

Please have a look at our guide to managing documents for RAG and ID prefixes.

Hope this helps!

Best,
Zack