1
一个MongoDB的查询下面的查询MongoDB中壳工作:如何编写pymongo
db.user.count({$and: [ {"agent_id":{$exists:true}}, {"is_agent":{$ne:true}} ] })
当我尝试在Python中,我得到了不同的答案。这里是python代码:
import pymongo
from pymongo import MongoClient
def getCollection(cient,dbname,collection):
"""Return a colleciton based on client, db and collection"""
data_base = getattr(client, dbname)
collObject = getattr(data_base, collection)
return collObject
userColl = getCollection(client, "hkpr_restore","user")
usersWithAgents = userColl.count({"$and": [ {"agent_id":{"$exists":"true"}}, {"is_agent":{"$ne":"true"}} ] })
print usersWithAgents
对于mongo shell查询结果约为11,000,对python脚本查询结果约为17,000。
你能更具体地说明你如何得到不同的答案吗? –
对于一个mongo shell查询约为11,000,对于python脚本查询约为17,000。 – dwstein