Python Tutorials · Python MongoDB

MongoDB Update

Learn all about MongoDB Update in this comprehensive tutorial.

5 min read advanced

MongoDB Drop Collection

MongoDB Limit

•You can update a record, or document as it is called in MongoDB, by using the update_one() method.
•To update all documents that meets the criteria of the query, use the update_many() method.

Update Collection

You can update a record, or document as it is called in MongoDB, by using the update_one() method.

The first parameter of the update_one() method is a query object defining which document to update.

Note: Note: If the query finds more than one record, only the first occurrence is updated.

The second parameter is an object defining the new values of the document.

python

import pymongomyclient = pymongo.MongoClient("mongodb://localhost:27017/")
  mydb = myclient["mydatabase"]mycol = mydb["customers"]
myquery = { "address": "Valley 345" }newvalues = { "$set": { 
  "address": "Canyon 123" } }
mycol.update_one(myquery, newvalues)#print "customers" after the update:for val_1 in mycol.find():  print(val_1)

Update Many

To update all documents that meets the criteria of the query, use the update_many() method.

python

import pymongomyclient = pymongo.MongoClient("mongodb://localhost:27017/")
  mydb = myclient["mydatabase"]mycol = mydb["customers"]
myquery = { "address": { "$regex": "^S" } }newvalues = { "$set": { 
  "name": "Minnie" } }
val_1 = mycol.update_many(myquery, newvalues)print(val_1.modified_count, "documents updated.")

Module quiz

2 questions

Which of the following is true about MongoDB Update?

It is strictly typedIt is evaluated at runtimeIt requires explicit memory managementIt is deprecated

What is the most common pitfall when working with MongoDB Update?

SyntaxErrorIndentationErrorNameErrorTypeError

Answer all questions to submit.