Trouble deleting ChromaDB documents

Question

I can't seem to delete documents from my Chroma vector database. I would appreciate any insight as to why this example does not work, and what modifications can/should be made to get it functioning correctly.

import dotenv
import os
import chromadb
from chromadb.config import Settings
from chromadb.utils import embedding_functions

dotenv.load_dotenv()

client = chromadb.Client(
    Settings(chroma_db_impl="duckdb+parquet", persist_directory="db/chroma")
)

embedding = embedding_functions.OpenAIEmbeddingFunction(
    api_key=os.getenv("OPENAI_API_KEY"),
    model_name="text-embedding-ada-002",
)

collection = client.get_or_create_collection(name="test", embedding_function=embedding)

from llama_index import SimpleDirectoryReader

documents = SimpleDirectoryReader(
    input_dir="./sampledir",
    recursive=True,
    exclude_hidden=False,
    filename_as_id=True,
).load_data()

collection.add(
    documents=[doc.get_text() for doc in documents],
    ids=[doc.doc_id for doc in documents],
)

print(collection.count())  # PRINTS n

doc_ids = collection.get()["ids"]
collection.delete(ids=doc_ids)

print(collection.count())  # SHOULD BE ZERO, BUT PRINTS n