1
我有一个蒙戈数据库这个数据,MongoDB的最近30天的数据
{
"_id": {
"$oid": "5654a8f0d487dd1434571a6e"
},
"ValidationDate": {
"$date": "2015-11-24T13:06:19.363Z"
},
"DataRaw": " WL 00100100012015-08-28 02:44:17+0000+ 16.81 8.879 1084.00",
"ReadingsAreValid": true,
"locationID": " WL 001",
"Readings": {
"pH": {
"value": 8.879
},
"SensoreDate": {
"value": {
"$date": "2015-08-28T02:44:17.000Z"
}
},
"temperature": {
"value": 16.81
},
"Conductivity": {
"value": 1084
}
},
"HMAC": "ecb98d73fcb34ce2c5bbcc9c1265c8ca939f639d791a1de0f6275e2d0d71a801"
}
我的目标是计算满足给定的范围为最近30天的温度,pH值和电导率值,但我得到的错误,我无法在网上搜索时解决。这是我的代码。
import datetime
from pymongo import MongoClient
def total_data_push():
data = MongoClient().cloudtest.test_5_27
now = datetime.datetime.utcnow()
last_30d = now - datetime.timedelta(days=30)
last_year = now.replace(year=now.year - 1)
since_last_month = data.find({"ReadingsAreValid": False}, {"ValidationDate": {"$gte": last_30d}},
{"Readings.temperature.value": {"$gt": 1.0}}).count()
print since_last_month
def main():
total_data_push()
if __name__ == "__main__":
main()
当我没有ValidationDate片运行该脚本,它返回正确的值,但加入这个数据组件来获得,对于过去30天返回以下错误
traceback (most recent call last):
File "total_data_push.py", line 29, in <module>
main()
File "total_data_push.py", line 26, in main
total_data_push()
File "total_data_push.py", line 17, in total_data_push
{"Readings.temperature.value": {"$gt": 1.0}}).count()
File "/Library/Python/2.7/site-packages/pymongo/collection.py", line 866, in find
return Cursor(self, *args, **kwargs)
File "/Library/Python/2.7/site-packages/pymongo/cursor.py", line 90, in __init__
raise TypeError("skip must be an instance of int")
TypeError: skip must be an instance of int
什么我真的很想在这里?感谢提前
我从来没有从python使用过Mongodb,所以我不确定客户端库是否更改find方法的签名,但是mongo collection.find只接受2个参数,即过滤器和投影。你似乎有定义的,而不是一个组合 {{ \t \t “ReadingsAreValid” 3种不同的滤镜对象: “$ GTE”{ \t \t \t:假 \t}, \t { \t \t “ValidationDate” last_30d \t \t} \t}, \t { \t \t “Readings.temperature.value”:{ \t \t \t“$ gt”:1.0 \t \t} \t} } – BenCr