182 lines
7.1 KiB
Python
182 lines
7.1 KiB
Python
from langchain_openai import ChatOpenAI
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from typing import TypedDict, Annotated, List, Optional, Union
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import pandas as pd
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from langgraph.types import Command, interrupt
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from langgraph.graph import StateGraph, END, START
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from langgraph.checkpoint.memory import MemorySaver
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import orjson, logging
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logger = logging.getLogger(__name__)
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from decouple import config
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from template.template import get_base_template
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from util.utils import extract_nested_json, check_and_get_sql, get_chart_type_from_sql_answer
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from datetime import datetime
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from util import train_ddl
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gen_history_llm = ChatOpenAI(
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model=config('CHAT_MODEL_NAME', default=''),
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base_url=config('CHAT_MODEL_BASE_URL', default=''),
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temperature=config('SQL_MODEL_TEMPERATURE', default=0.5, cast=float),
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max_tokens=8000,
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max_retries=2,
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api_key=config('CHAT_MODEL_API_KEY', default='empty'),
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)
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gen_sql_llm = ChatOpenAI(
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model=config('SQL_MODEL_NAME', default=''),
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base_url=config('SQL_MODEL_BASE_URL', default=''),
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temperature=config('SQL_MODEL_TEMPERATURE', default=0.5, cast=float),
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max_tokens=8000,
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max_retries=2,
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api_key=config('SQL_MODEL_API_KEY', default='empty'),
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)
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'''
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用于生成sql,生成图表的agent，上下文
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'''
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class SqlAgentState(TypedDict):
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user_question: str
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rewritten_user_question: Optional[str]
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session_id: str
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user_id: str
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history: Optional[list]
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gen_sql_result: Optional[dict]
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gen_chart_result: Optional[dict]
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gen_sql_error: Optional[str]
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gen_chart_error: Optional[str]
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final_error_msg: Optional[str]
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sql_retry_count: int
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chart_retry_count: int
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'''
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基于上下文，历史消息，重写用户问题
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'''
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def _rewrite_user_question(state: SqlAgentState) -> dict:
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logger.info(f"user:{state.get('user_id', '1')} 进入 _rewrite_user_question 节点")
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user_question = state['user_question']
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template = get_base_template()
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rewrite_temp = template['template']['rewrite_question']
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history = state.get('history', [])
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sys_promot = rewrite_temp['system'].format(current_question=user_question, history=history)
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new_question = gen_history_llm.invoke(sys_promot).text
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logger.info("new_question:{0}".format(new_question))
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result = extract_nested_json(new_question)
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logger.info(f"result:{result}")
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result = orjson.loads(result)
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return {"rewritten_user_question": result.get('question', user_question)}
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def _gen_sql(state: SqlAgentState) -> dict:
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from main_service import vn
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logger.info(f"user:{state.get('user_id', '1')} 进入 _gen_sql 节点")
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question = state.get('rewritten_user_question', state['user_question'])
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service = vn
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question_sql_list = service.get_similar_question_sql(question)
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if question_sql_list and len(question_sql_list) > 3:
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question_sql_list = question_sql_list[:3]
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ddl_list = service.get_related_ddl(question)
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template = get_base_template()
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sql_temp = template['template']['sql']
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history = []
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try:
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sys_temp = sql_temp['system'].format(engine=config("DB_ENGINE", default='mysql'), lang='中文',
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schema=ddl_list, documentation=[train_ddl.train_document],
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history=history, retrieved_examples_data=question_sql_list,
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data_training=question_sql_list, )
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user_temp = sql_temp['user'].format(question=question,
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current_time=datetime.now().strftime('%Y-%m-%d %H:%M:%S'))
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rr = gen_sql_llm.invoke(
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[{'role': 'system', 'content': sys_temp}, {'role': 'user', 'content': user_temp}]).text
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result = extract_nested_json(rr)
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logger.info(f"gensql result: {result}")
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result = orjson.loads(result)
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retry = state.get("sql_retry_count", 0) + 1
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return {'gen_sql_result': result,"sql_retry_count": retry}
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except Exception as e:
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import traceback
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traceback.print_exc()
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retry = state.get("sql_retry_count", 0) + 1
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logger.info("cus_vanna_srevice failed-------------------: ")
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return {'gen_sql_error': str(e), "sql_retry_count": retry}
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def _gen_chart(state: SqlAgentState) -> dict:
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logger.info(f"user:{state.get('user_id', '1')} 进入 _gen_chart 节点")
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template = get_base_template()
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gen_sql_result=state.get('gen_sql_result', {})
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sql = gen_sql_result.get('sql', '')
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char_type = gen_sql_result.get('char_type', '')
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question = state.get('rewritten_user_question', state['user_question'])
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char_temp = template['template']['chart']
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try:
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sys_char_temp = char_temp['system'].format(engine=config("DB_ENGINE", default='mysql'),
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lang='中文', sql=sql, chart_type=char_type)
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user_char_temp = char_temp['user'].format(sql=sql, chart_type=char_type, question=question)
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rr=gen_history_llm.invoke([{'role': 'system', 'content': sys_char_temp}, {'role': 'user', 'content': user_char_temp}]).text
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retry = state.get("chart_retry_count", 0) + 1
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return {"chart_retry_count": retry,'gen_chart_result': orjson.loads(extract_nested_json(rr))}
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except Exception as e:
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import traceback
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traceback.print_exc()
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retry = state.get("chart_retry_count", 0) + 1
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return {'gen_chart_error': str(e), "chart_retry_count": retry}
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# 如果生成sql失败，则重试2次，如果仍然失败，则返回错误信息
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def gen_sql_handler(state: SqlAgentState) -> str:
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sql_error = state.get('gen_sql_error', '')
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sql_result = state.get('gen_sql_result', {})
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sql_retry_count = state.get('sql_retry_count', 0)
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if sql_error and len(sql_error) > 0:
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if sql_retry_count < 2:
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return '_gen_sql'
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else:
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return END
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sql = sql_result.get('sql', '')
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if len(sql) > 0:
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return '_gen_chart'
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else:
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if sql_retry_count < 2:
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return '_gen_sql'
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else:
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return END
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def gen_chart_handler(state: SqlAgentState) -> str:
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chart_error = state.get('gen_chart_error', '')
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chart_result = state.get('gen_chart_result', {})
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sql_retry_count = state.get('chart_retry_count', 0)
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if chart_error and len(chart_error) > 0:
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if sql_retry_count < 2:
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return '_gen_chart'
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else:
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return END
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title = chart_result.get('title', '')
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if len(title) > 0:
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return END
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else:
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if sql_retry_count < 2:
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return '_gen_chart'
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else:
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return END
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workflow = StateGraph(SqlAgentState)
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workflow.add_node("_rewrite_user_question", _rewrite_user_question)
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workflow.add_node("_gen_sql", _gen_sql)
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workflow.add_node("_gen_chart",_gen_chart)
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workflow.add_edge(START, "_rewrite_user_question")
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workflow.add_edge("_rewrite_user_question", "_gen_sql")
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workflow.add_conditional_edges('_gen_sql', gen_sql_handler, ['_gen_sql', '_gen_chart',END])
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workflow.add_conditional_edges('_gen_chart', gen_chart_handler, [ '_gen_chart',END])
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memory = MemorySaver()
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sql_chart_agent = workflow.compile(checkpointer=memory)
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png_data=sql_chart_agent .get_graph().draw_mermaid_png()
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# with open("D://graph.png", "wb") as f:
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# f.write(png_data) |