Question

如何将db.collection.count()变成Python脚本？

我只想让它返回一个数字。

#import json file to MongoDB
logger.info(' Import du fichier .json vers la base MongoDB')
#subprocess.call('mongoimport --db AutoPrivilege -c cars stockvo.json --jsonArray --upsert --drop',shell=True)
p = subprocess.Popen(['mongoimport', '--db', 'myBD', '-c', 'cars', '/opt/data/stockvo.json', '--jsonArray', '--upsert', '--drop'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout, stderr = p.communicate()

if stdout:
    logger.info(stdout)

if stderr:
    logger.error(stderr)

提前致谢。

Answer 1

您将需要连接到您的数据库，然后运行db.collection.count()来计算您的集合中的项目在python中。

import pymongo

# connect to mongodb instance
conn = pymongo.MongoClient('localhost')
# connect to the database
db   = conn['mydb']
# print a count of the items in our collection
print(db.collection.count())

Answer 2

#!/usr/bin/env python

from pymongo import MongoClient

#connect to mongodb instance
connection = MongoClient("localhost")

# connect to the myDB database and the stock collection
db = connection.myDB.stock 

# print out the count
print(db.count())

# close the connection to MongoDB
connection.close()

返回集合的计数

2 个答案: