使用 Pymongo 提取 MongoDB 中最新文档的时间戳

Question

我有mongoDB collection列filename和text

我想提取最近document使用的时间戳pymongo

我尝试过的：

from pymongo import MongoClient
host = "127.0.0.1:27017"
client = MongoClient(host)

# print(client)

# Getting a database
db = client['ResumeParsing']
# Getting a collection
coll = db.Resume

print(coll.find({"_id": {"$gt": 1}}).sort([("_id", 1), ("date", -1)]))

这给我的输出为：

<pymongo.cursor.Cursor object at 0x00000187738CD860>

虽然我想要日期时间作为结果。

Answer 1

我找出解决方案。

from pymongo import MongoClient
import pymongo

host = "127.0.0.1:27017"
client = MongoClient(host)

db = client['ResumeParsing']

coll = db.Resume

# Convert the output of query into list 
latest_doc = list(db.Resume.find().sort("_id", pymongo.DESCENDING).limit(1))

# use generation_time attribute to get datetime from _id
print(latest_doc[0]['_id'].generation_time)

这给我的输出为：

2018-08-27 09:16:56+00:00