97 lines
3.8 KiB
Python
97 lines
3.8 KiB
Python
# data_handling.py
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import os
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from pathlib import Path
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from typing import List, Optional
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import logging # Added logging
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from haystack import Document
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from milvus_haystack import MilvusDocumentStore
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# Import config variables needed
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from config import (
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OPENAI_EMBEDDING_DIM, # Keep for logging/validation if desired, but not passed to init
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USER_ID_PREFIX,
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MILVUS_PERSIST_BASE_DIR,
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MILVUS_INDEX_PARAMS,
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MILVUS_SEARCH_PARAMS,
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MILVUS_STAND_URI,
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)
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logger = logging.getLogger(__name__) # Use logger
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# get_user_milvus_path function remains the same
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def get_user_milvus_path(user_id: str, base_dir: Path = MILVUS_PERSIST_BASE_DIR) -> str:
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"""
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获取指定用户的 Milvus Lite 数据库文件路径。
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该函数会执行以下操作：
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1. 基于- `base_dir` 和 `user_id` 构建一个用户专属的目录路径。
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2. 确保该目录存在，如果不存在则会创建它。
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3. 将目录路径与固定的数据库文件名 "milvus_lite.db" 组合。
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4. 返回最终的完整文件路径（字符串格式）。
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Args:
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user_id (str): 用户的唯一标识符。
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base_dir (Path, optional): Milvus 数据持久化的根目录.
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默认为 MILVUS_PERSIST_BASE_DIR.
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Returns:
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str: 指向用户 Milvus 数据库文件的完整路径字符串。
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"""
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user_db_dir = base_dir / user_id
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user_db_dir.mkdir(parents=True, exist_ok=True)
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return str(user_db_dir / "milvus_lite.db")
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def initialize_milvus_lite(user_id: str) -> MilvusDocumentStore:
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"""
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Initializes Milvus Lite DocumentStore for a user using milvus-haystack.
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Dimension is inferred by Milvus upon first write, not passed here.
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"""
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print(f"Initializing Milvus Lite store for user: {user_id}")
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milvus_uri = get_user_milvus_path(user_id)
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print(f"Milvus Lite URI: {milvus_uri}")
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# Log the dimension expected based on config, even if not passed directly
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print(f"Expecting Embedding Dimension (for first write): {OPENAI_EMBEDDING_DIM}")
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document_store = MilvusDocumentStore(
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connection_args={"uri": milvus_uri},
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collection_name=user_id, # Default or customize
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index_params=MILVUS_INDEX_PARAMS, # Pass index config
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search_params=MILVUS_SEARCH_PARAMS, # Pass search config
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drop_old=False, # Keep drop_old for testing convenience
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)
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# Note: The actual schema dimension is set when the first document with an embedding is written.
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print(f"Milvus Lite store instance created for user {user_id} at {milvus_uri}")
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return document_store
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# add_user_document_to_store and get_user_documents can remain if needed for other purposes,
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def add_user_document_to_store(
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document_store: MilvusDocumentStore, user_id: str, text: str
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):
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doc = Document(content=text, meta={"user_id": user_id})
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print(f"Adding document for user {user_id}: '{text[:50]}...'")
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document_store.write_documents([doc])
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# get_user_documents function remains the same
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def get_user_documents(
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document_store: MilvusDocumentStore, user_id: str
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) -> List[Document]:
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print(f"Retrieving all documents for user {user_id}...")
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all_docs = document_store.get_all_documents()
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print(f"Found {len(all_docs)} documents for user {user_id}.")
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return all_docs
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# Optional: Test code similar to before, but now using the OpenAI dimension
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if __name__ == "__main__":
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test_user = "test_user_openai_data"
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store = initialize_milvus_lite(test_user)
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# Add dummy docs (won't be embedded here, just stored)
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add_user_document_to_store(store, test_user, "第一个文档，关于 OpenAI。")
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add_user_document_to_store(store, test_user, "第二个文档，使用 API。")
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docs = get_user_documents(store, test_user)
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for d in docs:
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print(f" - {d.content} (Meta: {d.meta})")
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# Cleanup code similar to before
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