238 lines
9.0 KiB
Python
238 lines
9.0 KiB
Python
import logging
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import os
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from logging.handlers import RotatingFileHandler
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import jieba
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from gensim.models import KeyedVectors
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from Config.Config import MODEL_LIMIT, MODEL_PATH, ES_CONFIG
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from ElasticSearch.Utils.ElasticsearchConnectionPool import ElasticsearchConnectionPool
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# 初始化日志
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logger = logging.getLogger(__name__)
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logger.setLevel(logging.INFO)
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# 确保日志目录存在
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os.makedirs('Logs', exist_ok=True)
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handler = RotatingFileHandler('Logs/start.log', maxBytes=1024 * 1024, backupCount=5)
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handler.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s'))
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logger.addHandler(handler)
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class EsSearchUtil:
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def __init__(self, es_config):
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"""
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初始化Elasticsearch搜索工具
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:param es_config: Elasticsearch配置字典，包含hosts, username, password, index_name等
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"""
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self.es_config = es_config
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# 初始化连接池
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self.es_pool = ElasticsearchConnectionPool(
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hosts=es_config['hosts'],
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basic_auth=es_config['basic_auth'],
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verify_certs=es_config.get('verify_certs', False),
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max_connections=50
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)
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# 保留直接连接用于兼容
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from elasticsearch import Elasticsearch
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self.es = Elasticsearch(
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hosts=es_config['hosts'],
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basic_auth=es_config['basic_auth'],
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verify_certs=es_config.get('verify_certs', False)
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)
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# 确保es_conn属性存在以兼容旧代码
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self.es_conn = self.es
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# 确保es_conn属性存在以兼容旧代码
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self.es_conn = self.es
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# 加载预训练模型
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self.model = KeyedVectors.load_word2vec_format(MODEL_PATH, binary=False, limit=MODEL_LIMIT)
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logger.info(f"模型加载成功，词向量维度: {self.model.vector_size}")
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# 初始化Elasticsearch连接
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self.es = Elasticsearch(
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hosts=es_config['hosts'],
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basic_auth=es_config['basic_auth'],
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verify_certs=False
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)
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self.index_name = es_config['index_name']
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def text_to_embedding(self, text):
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# 使用已加载的模型
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# 对文本分词并计算平均向量
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words = jieba.lcut(text)
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vectors = [self.model[word] for word in words if word in self.model]
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if not vectors:
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return [0.0] * self.model.vector_size
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# 计算平均向量
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avg_vector = [sum(dim)/len(vectors) for dim in zip(*vectors)]
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return avg_vector
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def vector_search(self, query, size=10):
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query_embedding = self.text_to_embedding(query)
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script_query = {
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"script_score": {
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"query": {"match_all": {}},
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"script": {
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"source": "double score = cosineSimilarity(params.query_vector, 'embedding'); return score >= 0 ? score : 0",
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"params": {"query_vector": query_embedding}
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}
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}
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}
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return self.es_conn.search(
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index=self.es_config['index_name'],
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query=script_query,
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size=size
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)
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def text_search(self, query, size=10):
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return self.es_conn.search(
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index=self.es_config['index_name'],
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query={"match": {"user_input": query}},
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size=size
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)
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def hybrid_search(self, query, size=10):
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"""
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执行混合搜索（向量搜索+文本搜索）
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:param query: 搜索查询文本
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:param size: 返回结果数量
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:return: 包含两种搜索结果的字典
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"""
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vector_results = self.vector_search(query, size)
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text_results = self.text_search(query, size)
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return {
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'vector_results': vector_results,
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'text_results': text_results
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}
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def search(self, query, search_type='hybrid', size=10):
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"""
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统一搜索接口
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:param query: 搜索查询文本
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:param search_type: 搜索类型（'vector', 'text' 或 'hybrid'）
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:param size: 返回结果数量
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:return: 搜索结果
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"""
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if search_type == 'vector':
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return self.vector_search(query, size)
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elif search_type == 'text':
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return self.text_search(query, size)
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else:
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return self.hybrid_search(query, size)
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def queryByEs(query, query_tags, logger):
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# 获取EsSearchUtil实例
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es_search_util = EsSearchUtil(ES_CONFIG)
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# 执行混合搜索
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es_conn = es_search_util.es_pool.get_connection()
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try:
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# 向量搜索
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logger.info(f"\n=== 开始执行查询 ===")
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logger.info(f"原始查询文本: {query}")
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logger.info(f"查询标签: {query_tags}")
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logger.info("\n=== 向量搜索阶段 ===")
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logger.info("1. 文本分词和向量化处理中...")
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query_embedding = es_search_util.text_to_embedding(query)
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logger.info(f"2. 生成的查询向量维度: {len(query_embedding)}")
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logger.info(f"3. 前3维向量值: {query_embedding[:3]}")
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logger.info("4. 正在执行Elasticsearch向量搜索...")
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vector_results = es_conn.search(
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index=ES_CONFIG['index_name'],
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body={
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"query": {
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"script_score": {
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"query": {
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"bool": {
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"should": [
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{
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"terms": {
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"tags.tags": query_tags
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}
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}
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],
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"minimum_should_match": 1
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}
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},
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"script": {
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"source": "double score = cosineSimilarity(params.query_vector, 'embedding'); return score >= 0 ? score : 0",
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"params": {"query_vector": query_embedding}
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}
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}
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},
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"size": 3
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}
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)
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# 处理一下，判断是否到达阀值
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filtered_vector_hits = []
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vector_int = 0
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for hit in vector_results['hits']['hits']:
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if hit['_score'] > 0.8: # 阀值0.8
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# 新增语义相关性检查
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if all(word in hit['_source']['user_input'] for word in jieba.lcut(query)):
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logger.info(f" {vector_int + 1}. 文档ID: {hit['_id']}, 相似度分数: {hit['_score']:.2f}")
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logger.info(f" 内容: {hit['_source']['user_input']}")
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filtered_vector_hits.append(hit)
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vector_int += 1
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# 更新vector_results只包含通过过滤的文档
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vector_results['hits']['hits'] = filtered_vector_hits
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logger.info(f"5. 向量搜索结果数量(过滤后): {vector_int}")
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# 文本精确搜索
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logger.info("\n=== 文本精确搜索阶段 ===")
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logger.info("1. 正在执行Elasticsearch文本精确搜索...")
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text_results = es_conn.search(
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index=ES_CONFIG['index_name'],
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body={
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"query": {
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"bool": {
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"must": [
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{
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"match": {
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"user_input": query
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}
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},
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{
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"terms": {
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"tags.tags": query_tags
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}
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}
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]
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}
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},
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"size": 3
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}
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)
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logger.info(f"2. 文本搜索结果数量: {len(text_results['hits']['hits'])}")
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# 合并vector和text结果
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all_sources = [hit['_source'] for hit in vector_results['hits']['hits']] + \
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[hit['_source'] for hit in text_results['hits']['hits']]
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# 去重处理
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unique_sources = []
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seen_user_inputs = set()
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for source in all_sources:
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if source['user_input'] not in seen_user_inputs:
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seen_user_inputs.add(source['user_input'])
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unique_sources.append(source)
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logger.info(f"合并后去重结果数量: {len(unique_sources)}条")
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search_results = {
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"text_results": unique_sources
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}
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return search_results
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finally:
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es_search_util.es_pool.release_connection(es_conn) |