如何解决这个问题pymongo.errors.OperationFailure？

Question

我正试图在我的数据库中进行标题搜索，但我做不到

import pymongo

myclient = pymongo.MongoClient("mongodb+srv://LOGIN:PASS@cluster0.ye4cx.mongodb.net/info?retryWrites=true&w=majority&ssl=true&ssl_cert_reqs=CERT_NONE")
mydb = myclient["info"]
mycol = mydb["comics"]

find = mycol.find({"title": {"$search": "68"}})

for f in find:
    print(f)

但是我得到了这个错误

raise OperationFailure(msg % errmsg, code, response,
pymongo.errors.OperationFailure: unknown operator: $search, full error: {'operationTime': Timestamp(1601923289, 13), 'ok': 0.0, 'errmsg': 'unknown operator: $search', 'code': 2, 'codeName': 'BadValue', '$clusterTime': {'clusterTime': Timestamp(1601923289, 13), 'signature': {'hash': b'\x82\x91\xc5\xd4r\xd6\xbf\xbc\x13i\xe5\x83b\xd2\x9eUv\xb8\x89/', 'keyId': 6869109962937729027}}}

Answer 1

您需要使用$text操作符使其工作。不要忘记在标题字段上创建索引

import pymongo
from pymongo import TEXT

myclient = pymongo.MongoClient("mongodb+srv://LOGIN:PASS@cluster0.ye4cx.mongodb.net/info?retryWrites=true&w=majority&ssl=true&ssl_cert_reqs=CERT_NONE")
mydb = myclient["info"]
mycol = mydb["comics"]

#Creating index on title
mycol.create_index([('title', TEXT)], default_language='english')

find = mycol.find({"$text": {"$search": "68"}})

for f in find:
    print(f)

这将搜索所有索引字段并返回匹配字段。请参阅有关official documentation的更多详细信息

Answer 2

$search是聚合管道操作符。有关正确用法，请参见https://docs.atlas.mongodb.com/reference/atlas-search/query-syntax/#query-syntax-ref。无法在查找查询中指定它