RAGflow/api/db/services/dialog_service.py

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#
# Copyright 2024 The InfiniFlow Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import logging
import binascii
import time
from functools import partial
import re
from copy import deepcopy
from timeit import default_timer as timer
from agentic_reasoning import DeepResearcher
from api.db import LLMType, ParserType, StatusEnum
from api.db.db_models import Dialog, DB
from api.db.services.common_service import CommonService
from api.db.services.knowledgebase_service import KnowledgebaseService
from api.db.services.llm_service import TenantLLMService, LLMBundle
from api import settings
from rag.app.resume import forbidden_select_fields4resume
from rag.app.tag import label_question
from rag.nlp.search import index_name
from rag.prompts import kb_prompt, message_fit_in, llm_id2llm_type, keyword_extraction, full_question, chunks_format, \
citation_prompt
from rag.utils import rmSpace, num_tokens_from_string
from rag.utils.tavily_conn import Tavily
class DialogService(CommonService):
model = Dialog
@classmethod
@DB.connection_context()
def get_list(cls, tenant_id,
page_number, items_per_page, orderby, desc, id, name):
chats = cls.model.select()
if id:
chats = chats.where(cls.model.id == id)
if name:
chats = chats.where(cls.model.name == name)
chats = chats.where(
(cls.model.tenant_id == tenant_id)
& (cls.model.status == StatusEnum.VALID.value)
)
if desc:
chats = chats.order_by(cls.model.getter_by(orderby).desc())
else:
chats = chats.order_by(cls.model.getter_by(orderby).asc())
chats = chats.paginate(page_number, items_per_page)
return list(chats.dicts())
def chat_solo(dialog, messages, stream=True):
if llm_id2llm_type(dialog.llm_id) == "image2text":
chat_mdl = LLMBundle(dialog.tenant_id, LLMType.IMAGE2TEXT, dialog.llm_id)
else:
chat_mdl = LLMBundle(dialog.tenant_id, LLMType.CHAT, dialog.llm_id)
prompt_config = dialog.prompt_config
tts_mdl = None
if prompt_config.get("tts"):
tts_mdl = LLMBundle(dialog.tenant_id, LLMType.TTS)
msg = [{"role": m["role"], "content": re.sub(r"##\d+\$\$", "", m["content"])}
for m in messages if m["role"] != "system"]
if stream:
last_ans = ""
for ans in chat_mdl.chat_streamly(prompt_config.get("system", ""), msg, dialog.llm_setting):
answer = ans
delta_ans = ans[len(last_ans):]
if num_tokens_from_string(delta_ans) < 16:
continue
last_ans = answer
yield {"answer": answer, "reference": {}, "audio_binary": tts(tts_mdl, delta_ans), "prompt": "", "created_at": time.time()}
if delta_ans:
yield {"answer": answer, "reference": {}, "audio_binary": tts(tts_mdl, delta_ans), "prompt": "", "created_at": time.time()}
else:
answer = chat_mdl.chat(prompt_config.get("system", ""), msg, dialog.llm_setting)
user_content = msg[-1].get("content", "[content not available]")
logging.debug("User: {}|Assistant: {}".format(user_content, answer))
yield {"answer": answer, "reference": {}, "audio_binary": tts(tts_mdl, answer), "prompt": "", "created_at": time.time()}
def chat(dialog, messages, stream=True, **kwargs):
assert messages[-1]["role"] == "user", "The last content of this conversation is not from user."
if not dialog.kb_ids:
for ans in chat_solo(dialog, messages, stream):
yield ans
return
chat_start_ts = timer()
if llm_id2llm_type(dialog.llm_id) == "image2text":
llm_model_config = TenantLLMService.get_model_config(dialog.tenant_id, LLMType.IMAGE2TEXT, dialog.llm_id)
else:
llm_model_config = TenantLLMService.get_model_config(dialog.tenant_id, LLMType.CHAT, dialog.llm_id)
max_tokens = llm_model_config.get("max_tokens", 8192)
check_llm_ts = timer()
kbs = KnowledgebaseService.get_by_ids(dialog.kb_ids)
embedding_list = list(set([kb.embd_id for kb in kbs]))
if len(embedding_list) != 1:
yield {"answer": "**ERROR**: Knowledge bases use different embedding models.", "reference": []}
return {"answer": "**ERROR**: Knowledge bases use different embedding models.", "reference": []}
embedding_model_name = embedding_list[0]
retriever = settings.retrievaler
questions = [m["content"] for m in messages if m["role"] == "user"][-3:]
attachments = kwargs["doc_ids"].split(",") if "doc_ids" in kwargs else None
if "doc_ids" in messages[-1]:
attachments = messages[-1]["doc_ids"]
create_retriever_ts = timer()
embd_mdl = LLMBundle(dialog.tenant_id, LLMType.EMBEDDING, embedding_model_name)
if not embd_mdl:
raise LookupError("Embedding model(%s) not found" % embedding_model_name)
bind_embedding_ts = timer()
if llm_id2llm_type(dialog.llm_id) == "image2text":
chat_mdl = LLMBundle(dialog.tenant_id, LLMType.IMAGE2TEXT, dialog.llm_id)
else:
chat_mdl = LLMBundle(dialog.tenant_id, LLMType.CHAT, dialog.llm_id)
bind_llm_ts = timer()
prompt_config = dialog.prompt_config
field_map = KnowledgebaseService.get_field_map(dialog.kb_ids)
tts_mdl = None
if prompt_config.get("tts"):
tts_mdl = LLMBundle(dialog.tenant_id, LLMType.TTS)
# try to use sql if field mapping is good to go
if field_map:
logging.debug("Use SQL to retrieval:{}".format(questions[-1]))
ans = use_sql(questions[-1], field_map, dialog.tenant_id, chat_mdl, prompt_config.get("quote", True))
if ans:
yield ans
return
for p in prompt_config["parameters"]:
if p["key"] == "knowledge":
continue
if p["key"] not in kwargs and not p["optional"]:
raise KeyError("Miss parameter: " + p["key"])
if p["key"] not in kwargs:
prompt_config["system"] = prompt_config["system"].replace(
"{%s}" % p["key"], " ")
if len(questions) > 1 and prompt_config.get("refine_multiturn"):
questions = [full_question(dialog.tenant_id, dialog.llm_id, messages)]
else:
questions = questions[-1:]
refine_question_ts = timer()
rerank_mdl = None
if dialog.rerank_id:
rerank_mdl = LLMBundle(dialog.tenant_id, LLMType.RERANK, dialog.rerank_id)
bind_reranker_ts = timer()
generate_keyword_ts = bind_reranker_ts
thought = ""
kbinfos = {"total": 0, "chunks": [], "doc_aggs": []}
if "knowledge" not in [p["key"] for p in prompt_config["parameters"]]:
knowledges = []
else:
if prompt_config.get("keyword", False):
questions[-1] += keyword_extraction(chat_mdl, questions[-1])
generate_keyword_ts = timer()
tenant_ids = list(set([kb.tenant_id for kb in kbs]))
knowledges = []
if prompt_config.get("reasoning", False):
reasoner = DeepResearcher(chat_mdl,
prompt_config,
partial(retriever.retrieval, embd_mdl=embd_mdl, tenant_ids=tenant_ids, kb_ids=dialog.kb_ids, page=1, page_size=dialog.top_n, similarity_threshold=0.2, vector_similarity_weight=0.3))
for think in reasoner.thinking(kbinfos, " ".join(questions)):
if isinstance(think, str):
thought = think
knowledges = [t for t in think.split("\n") if t]
elif stream:
yield think
else:
kbinfos = retriever.retrieval(" ".join(questions), embd_mdl, tenant_ids, dialog.kb_ids, 1, dialog.top_n,
dialog.similarity_threshold,
dialog.vector_similarity_weight,
doc_ids=attachments,
top=dialog.top_k, aggs=False, rerank_mdl=rerank_mdl,
rank_feature=label_question(" ".join(questions), kbs)
)
if prompt_config.get("tavily_api_key"):
tav = Tavily(prompt_config["tavily_api_key"])
tav_res = tav.retrieve_chunks(" ".join(questions))
kbinfos["chunks"].extend(tav_res["chunks"])
kbinfos["doc_aggs"].extend(tav_res["doc_aggs"])
if prompt_config.get("use_kg"):
ck = settings.kg_retrievaler.retrieval(" ".join(questions),
tenant_ids,
dialog.kb_ids,
embd_mdl,
LLMBundle(dialog.tenant_id, LLMType.CHAT))
if ck["content_with_weight"]:
kbinfos["chunks"].insert(0, ck)
knowledges = kb_prompt(kbinfos, max_tokens)
logging.debug(
"{}->{}".format(" ".join(questions), "\n->".join(knowledges)))
retrieval_ts = timer()
if not knowledges and prompt_config.get("empty_response"):
empty_res = prompt_config["empty_response"]
yield {"answer": empty_res, "reference": kbinfos, "prompt": "\n\n### Query:\n%s" % " ".join(questions), "audio_binary": tts(tts_mdl, empty_res)}
return {"answer": prompt_config["empty_response"], "reference": kbinfos}
kwargs["knowledge"] = "\n------\n" + "\n\n------\n\n".join(knowledges)
gen_conf = dialog.llm_setting
msg = [{"role": "system", "content": prompt_config["system"].format(**kwargs)}]
prompt4citation = ""
if knowledges and (prompt_config.get("quote", True) and kwargs.get("quote", True)):
prompt4citation = citation_prompt()
# 过滤掉 system 角色的消息(因为前面已经单独处理了系统消息)
msg.extend([{"role": m["role"], "content": re.sub(r"##\d+\$\$", "", m["content"])}
for m in messages if m["role"] != "system"])
used_token_count, msg = message_fit_in(msg, int(max_tokens * 0.95))
assert len(msg) >= 2, f"message_fit_in has bug: {msg}"
prompt = msg[0]["content"]
if "max_tokens" in gen_conf:
gen_conf["max_tokens"] = min(
gen_conf["max_tokens"],
max_tokens - used_token_count)
def decorate_answer(answer):
nonlocal prompt_config, knowledges, kwargs, kbinfos, prompt, retrieval_ts, questions
refs = []
ans = answer.split("</think>")
think = ""
if len(ans) == 2:
think = ans[0] + "</think>"
answer = ans[1]
if knowledges and (prompt_config.get("quote", True) and kwargs.get("quote", True)):
answer = re.sub(r"##[ij]\$\$", "", answer, flags=re.DOTALL)
if not re.search(r"##[0-9]+\$\$", answer):
answer, idx = retriever.insert_citations(answer,
[ck["content_ltks"]
for ck in kbinfos["chunks"]],
[ck["vector"]
for ck in kbinfos["chunks"]],
embd_mdl,
tkweight=1 - dialog.vector_similarity_weight,
vtweight=dialog.vector_similarity_weight)
else:
idx = set([])
for r in re.finditer(r"##([0-9]+)\$\$", answer):
i = int(r.group(1))
if i < len(kbinfos["chunks"]):
idx.add(i)
idx = set([kbinfos["chunks"][int(i)]["doc_id"] for i in idx])
recall_docs = [
d for d in kbinfos["doc_aggs"] if d["doc_id"] in idx]
if not recall_docs:
recall_docs = kbinfos["doc_aggs"]
kbinfos["doc_aggs"] = recall_docs
refs = deepcopy(kbinfos)
for c in refs["chunks"]:
if c.get("vector"):
del c["vector"]
if answer.lower().find("invalid key") >= 0 or answer.lower().find("invalid api") >= 0:
answer += " Please set LLM API-Key in 'User Setting -> Model providers -> API-Key'"
finish_chat_ts = timer()
total_time_cost = (finish_chat_ts - chat_start_ts) * 1000
check_llm_time_cost = (check_llm_ts - chat_start_ts) * 1000
create_retriever_time_cost = (create_retriever_ts - check_llm_ts) * 1000
bind_embedding_time_cost = (bind_embedding_ts - create_retriever_ts) * 1000
bind_llm_time_cost = (bind_llm_ts - bind_embedding_ts) * 1000
refine_question_time_cost = (refine_question_ts - bind_llm_ts) * 1000
bind_reranker_time_cost = (bind_reranker_ts - refine_question_ts) * 1000
generate_keyword_time_cost = (generate_keyword_ts - bind_reranker_ts) * 1000
retrieval_time_cost = (retrieval_ts - generate_keyword_ts) * 1000
generate_result_time_cost = (finish_chat_ts - retrieval_ts) * 1000
prompt += "\n\n### Query:\n%s" % " ".join(questions)
prompt = f"{prompt}\n\n - Total: {total_time_cost:.1f}ms\n - Check LLM: {check_llm_time_cost:.1f}ms\n - Create retriever: {create_retriever_time_cost:.1f}ms\n - Bind embedding: {bind_embedding_time_cost:.1f}ms\n - Bind LLM: {bind_llm_time_cost:.1f}ms\n - Tune question: {refine_question_time_cost:.1f}ms\n - Bind reranker: {bind_reranker_time_cost:.1f}ms\n - Generate keyword: {generate_keyword_time_cost:.1f}ms\n - Retrieval: {retrieval_time_cost:.1f}ms\n - Generate answer: {generate_result_time_cost:.1f}ms"
return {"answer": think+answer, "reference": refs, "prompt": re.sub(r"\n", " \n", prompt), "created_at": time.time()}
if stream:
last_ans = "" # 记录上一次返回的完整回答
answer = "" # 当前累计的完整回答
for ans in chat_mdl.chat_streamly(prompt+prompt4citation, msg[1:], gen_conf):
# 如果存在思考过程(thought),移除相关标记
if thought:
ans = re.sub(r"<think>.*</think>", "", ans, flags=re.DOTALL)
answer = ans
# 计算新增的文本片段(delta)
delta_ans = ans[len(last_ans):]
# 如果新增token太少(小于16),跳过本次返回(避免频繁发送小片段)
if num_tokens_from_string(delta_ans) < 16:
continue
last_ans = answer
# 返回当前累计回答(包含思考过程)+新增片段)
yield {"answer": thought+answer, "reference": {}, "audio_binary": tts(tts_mdl, delta_ans)}
delta_ans = answer[len(last_ans):]
if delta_ans:
yield {"answer": thought+answer, "reference": {}, "audio_binary": tts(tts_mdl, delta_ans)}
yield decorate_answer(thought+answer)
else:
answer = chat_mdl.chat(prompt+prompt4citation, msg[1:], gen_conf)
user_content = msg[-1].get("content", "[content not available]")
logging.debug("User: {}|Assistant: {}".format(user_content, answer))
res = decorate_answer(answer)
res["audio_binary"] = tts(tts_mdl, answer)
yield res
def use_sql(question, field_map, tenant_id, chat_mdl, quota=True):
sys_prompt = "You are a Database Administrator. You need to check the fields of the following tables based on the user's list of questions and write the SQL corresponding to the last question."
user_prompt = """
Table name: {};
Table of database fields are as follows:
{}
Question are as follows:
{}
Please write the SQL, only SQL, without any other explanations or text.
""".format(
index_name(tenant_id),
"\n".join([f"{k}: {v}" for k, v in field_map.items()]),
question
)
tried_times = 0
def get_table():
nonlocal sys_prompt, user_prompt, question, tried_times
sql = chat_mdl.chat(sys_prompt, [{"role": "user", "content": user_prompt}], {
"temperature": 0.06})
sql = re.sub(r"<think>.*</think>", "", sql, flags=re.DOTALL)
logging.debug(f"{question} ==> {user_prompt} get SQL: {sql}")
sql = re.sub(r"[\r\n]+", " ", sql.lower())
sql = re.sub(r".*select ", "select ", sql.lower())
sql = re.sub(r" +", " ", sql)
sql = re.sub(r"([;]|```).*", "", sql)
if sql[:len("select ")] != "select ":
return None, None
if not re.search(r"((sum|avg|max|min)\(|group by )", sql.lower()):
if sql[:len("select *")] != "select *":
sql = "select doc_id,docnm_kwd," + sql[6:]
else:
flds = []
for k in field_map.keys():
if k in forbidden_select_fields4resume:
continue
if len(flds) > 11:
break
flds.append(k)
sql = "select doc_id,docnm_kwd," + ",".join(flds) + sql[8:]
logging.debug(f"{question} get SQL(refined): {sql}")
tried_times += 1
return settings.retrievaler.sql_retrieval(sql, format="json"), sql
tbl, sql = get_table()
if tbl is None:
return None
if tbl.get("error") and tried_times <= 2:
user_prompt = """
Table name: {};
Table of database fields are as follows:
{}
Question are as follows:
{}
Please write the SQL, only SQL, without any other explanations or text.
The SQL error you provided last time is as follows:
{}
Error issued by database as follows:
{}
Please correct the error and write SQL again, only SQL, without any other explanations or text.
""".format(
index_name(tenant_id),
"\n".join([f"{k}: {v}" for k, v in field_map.items()]),
question, sql, tbl["error"]
)
tbl, sql = get_table()
logging.debug("TRY it again: {}".format(sql))
logging.debug("GET table: {}".format(tbl))
if tbl.get("error") or len(tbl["rows"]) == 0:
return None
docid_idx = set([ii for ii, c in enumerate(
tbl["columns"]) if c["name"] == "doc_id"])
doc_name_idx = set([ii for ii, c in enumerate(
tbl["columns"]) if c["name"] == "docnm_kwd"])
column_idx = [ii for ii in range(
len(tbl["columns"])) if ii not in (docid_idx | doc_name_idx)]
# compose Markdown table
columns = "|" + "|".join([re.sub(r"(/.*|[^]+)", "", field_map.get(tbl["columns"][i]["name"],
tbl["columns"][i]["name"])) for i in
column_idx]) + ("|Source|" if docid_idx and docid_idx else "|")
line = "|" + "|".join(["------" for _ in range(len(column_idx))]) + \
("|------|" if docid_idx and docid_idx else "")
rows = ["|" +
"|".join([rmSpace(str(r[i])) for i in column_idx]).replace("None", " ") +
"|" for r in tbl["rows"]]
rows = [r for r in rows if re.sub(r"[ |]+", "", r)]
if quota:
rows = "\n".join([r + f" ##{ii}$$ |" for ii, r in enumerate(rows)])
else:
rows = "\n".join([r + f" ##{ii}$$ |" for ii, r in enumerate(rows)])
rows = re.sub(r"T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]+Z)?\|", "|", rows)
if not docid_idx or not doc_name_idx:
logging.warning("SQL missing field: " + sql)
return {
"answer": "\n".join([columns, line, rows]),
"reference": {"chunks": [], "doc_aggs": []},
"prompt": sys_prompt
}
docid_idx = list(docid_idx)[0]
doc_name_idx = list(doc_name_idx)[0]
doc_aggs = {}
for r in tbl["rows"]:
if r[docid_idx] not in doc_aggs:
doc_aggs[r[docid_idx]] = {"doc_name": r[doc_name_idx], "count": 0}
doc_aggs[r[docid_idx]]["count"] += 1
return {
"answer": "\n".join([columns, line, rows]),
"reference": {"chunks": [{"doc_id": r[docid_idx], "docnm_kwd": r[doc_name_idx]} for r in tbl["rows"]],
"doc_aggs": [{"doc_id": did, "doc_name": d["doc_name"], "count": d["count"]} for did, d in
doc_aggs.items()]},
"prompt": sys_prompt
}
def tts(tts_mdl, text):
if not tts_mdl or not text:
return
bin = b""
for chunk in tts_mdl.tts(text):
bin += chunk
return binascii.hexlify(bin).decode("utf-8")
def ask(question, kb_ids, tenant_id):
"""
处理用户搜索请求,从知识库中检索相关信息并生成回答
参数:
question (str): 用户的问题或查询
kb_ids (list): 知识库ID列表指定要搜索的知识库
tenant_id (str): 租户ID用于权限控制和资源隔离
流程:
1. 获取指定知识库的信息
2. 确定使用的嵌入模型
3. 根据知识库类型选择检索器(普通检索器或知识图谱检索器)
4. 初始化嵌入模型和聊天模型
5. 执行检索操作获取相关文档片段
6. 格式化知识库内容作为上下文
7. 构建系统提示词
8. 生成回答并添加引用标记
9. 流式返回生成的回答
返回:
generator: 生成器对象,产生包含回答和引用信息的字典
"""
kbs = KnowledgebaseService.get_by_ids(kb_ids)
embedding_list = list(set([kb.embd_id for kb in kbs]))
is_knowledge_graph = all([kb.parser_id == ParserType.KG for kb in kbs])
retriever = settings.retrievaler if not is_knowledge_graph else settings.kg_retrievaler
# 初始化嵌入模型,用于将文本转换为向量表示
embd_mdl = LLMBundle(tenant_id, LLMType.EMBEDDING, embedding_list[0])
# 初始化聊天模型,用于生成回答
chat_mdl = LLMBundle(tenant_id, LLMType.CHAT)
# 获取聊天模型的最大token长度用于控制上下文长度
max_tokens = chat_mdl.max_length
# 获取所有知识库的租户ID并去重
tenant_ids = list(set([kb.tenant_id for kb in kbs]))
# 调用检索器检索相关文档片段
kbinfos = retriever.retrieval(question, embd_mdl, tenant_ids, kb_ids,
1, 12, 0.1, 0.3, aggs=False,
rank_feature=label_question(question, kbs)
)
# 将检索结果格式化为提示词并确保不超过模型最大token限制
knowledges = kb_prompt(kbinfos, max_tokens)
prompt = """
Role: You're a smart assistant. Your name is Miss R.
Task: Summarize the information from knowledge bases and answer user's question.
Requirements and restriction:
- DO NOT make things up, especially for numbers.
- If the information from knowledge is irrelevant with user's question, JUST SAY: Sorry, no relevant information provided.
- Answer with markdown format text.
- Answer in language of user's question.
- DO NOT make things up, especially for numbers.
### Information from knowledge bases
%s
The above is information from knowledge bases.
""" % "\n".join(knowledges)
msg = [{"role": "user", "content": question}]
# 生成完成后添加回答中的引用标记
def decorate_answer(answer):
nonlocal knowledges, kbinfos, prompt
answer, idx = retriever.insert_citations(answer,
[ck["content_ltks"]
for ck in kbinfos["chunks"]],
[ck["vector"]
for ck in kbinfos["chunks"]],
embd_mdl,
tkweight=0.7,
vtweight=0.3)
idx = set([kbinfos["chunks"][int(i)]["doc_id"] for i in idx])
recall_docs = [
d for d in kbinfos["doc_aggs"] if d["doc_id"] in idx]
if not recall_docs:
recall_docs = kbinfos["doc_aggs"]
kbinfos["doc_aggs"] = recall_docs
refs = deepcopy(kbinfos)
for c in refs["chunks"]:
if c.get("vector"):
del c["vector"]
if answer.lower().find("invalid key") >= 0 or answer.lower().find("invalid api") >= 0:
answer += " Please set LLM API-Key in 'User Setting -> Model Providers -> API-Key'"
refs["chunks"] = chunks_format(refs)
return {"answer": answer, "reference": refs}
answer = ""
for ans in chat_mdl.chat_streamly(prompt, msg, {"temperature": 0.1}):
answer = ans
yield {"answer": answer, "reference": {}}
yield decorate_answer(answer)