pymongo中處理ObjectId & datetime型別無法轉為json
阿新 • • 發佈:2018-11-02
資料庫儲存格式:
{’_id’: ObjectId(‘5bd8f7379e8cc50aa4ed7eab’), ‘time’:datetime.datetime(2018, 10, 31, 8, 58, 7, 889000)}
查詢時出現錯誤:
TypeError: the JSON object must be str, bytes or bytearray, not ‘dict’
pymongo中處理ObjectId & datetime型別無法轉為json
from bson import ObjectId
import datetime
class JSONEncoder (json.JSONEncoder):
"""處理ObjectId & datetime型別無法轉為json"""
def default(self, o):
if isinstance(o, ObjectId):
return str(o)
if isinstance(o, datetime.datetime):
return datetime.datetime.strftime(o, '%Y-%m-%d %H:%M:%S')
return json.JSONEncoder. default(self, o)
# 例項查詢資料
cursor = db.collection.find({})
for ret in cursor:
ret = JSONEncoder().encode(ret)
print(' 查詢結果(json格式)': ret)
>>>查詢結果(json格式):
{"_id": "5bd8f7379e8cc50aa4ed7eab", "time": "2018-10-31 08:58:07"}