如何使用python检查mongodb中是否存在记录
我正在研究考勤系统。这是我要检查数据库中是否存在具有该id的员工的后端。它似乎不是这样工作的。 我正在将数据发送到mongodb，每个emp都有不同的ID。在添加新员工之前，我希望它检查员工或记录是否已经存在如何使用python检查mongodb中是否存在记录,python,mongodb,Python,Mongodb,我正在研究考勤系统。这是我要检查数据库中是否存在具有该id的员工的后端。它似乎不是这样工作的。 我正在将数据发送到mongodb，每个emp都有不同的ID。在添加新员工之前，我希望它检查员工或记录是否已经存在 def checkEmployee(self): """ Check if employee exists with the ID. Returns true if employee exists. :rtype: object :return:
def checkEmployee(self):
"""
Check if employee exists with the ID.
Returns true if employee exists.
:rtype: object
:return:
"""
result = collection.find_one({"emp_id": self.emp_id})
# result is none means employee does not exist.
if result is None:
return False
return True
def addUser(self, first_name, last_name):
""" Add user to the database,
Employee is already initialized with an emp_id. Use this method to add it to the database.
"""
if self.checkEmployee() is True:
return "Employee Exists"
if collection.find_one({"emp_id": self.emp_id}) is None:
# Userdata to be added to database.
userData = {
"emp_id": self.emp_id,
"first_name": first_name,
"last_name": last_name
}
result = collection.insert_one(userData)
# If data is successfully updated, Returns True else Returns False .
if result.acknowledged:
return True
else:
return False
else:
print("Employee Already Exists with ID: ", self.emp_id)
userData = {
"first_name": first_name,
"last_name": last_name
}
collection.upsert_one({ "_id": self.emp_id }, { "$set": userData }, upsert=True)
为什么不在
emp\u iduniqueerrordup\u key错误emp\u id\u id