CODEWITHSUNDEEP
python-3.xmongodb
Sudharsan M
Sudharsan M

Reputation: 33

TypeError: update() missing 1 required positional argument: 'document'

I tried to bind both the comparing attribute and $set attribute in a single variable and rendered to update function in mongodb. But it give me the below error

TypeError: update() missing 1 required positional argument: 'document'

Python 3 MongoDB

from pymongo import MongoClient
client = MongoClient("mongodb://localhost:27017/")
db = client.Mydb
collection = db.sampledb
new_contact = "6369723748"
updatestmt = "{\"ID\" : \"12345\"},{\"$set\" :{\"ID\" : \"67891\",\"Account_Number\" : \"1234 5678 9101\"}}"
print(updatestmt)

cursor = collection.update(updatestmt)
cursor1 = collection.find()

for i in cursor1:
    print(i)

Expected Result:

WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })

Actual Result:

Traceback (most recent call last):

File "dbupdate.py", line 12, in

cursor = collection.update(updatestmt)

TypeError: update() missing 1 required positional argument: 'document'

Upvotes: 3

Views: 17175

Answers (2)

Simon Kocurek
Simon Kocurek

Reputation: 2166

update() is deprecated and you should really use update_one() instead.

cursor = collection.update({'ID' : '12345'}, {'$set' : {'ID' : '67891', 'Account_Number' : '1234 5678 9101'}})

Upvotes: 2

Derlin
Derlin

Reputation: 9881

pymongo is working with dictionaries, not strings. (the error just tells you you are passing one single string, while it is expecting at least two arguments).

Hence use:

query = {"ID" : "12345"}
new_values = {"$set" : {"ID" : "67891", "Account_Number" : "1234 5678 9101"}}

cursor = collection.update(query, new_values)

Or, to match your syntax:

updatestmt = ({"ID" : "12345"}, {"$set" : {"ID" : "67891", "Account_Number" : "1234 5678 9101"}})
cursor = collection.update(*updatestmt)

BTW: update is now replaced with update_one (for your need), or update_many (if the query could match multiple records)

Upvotes: 2

Related Questions