Querying MongoDB (via pymongo) in case insensitive efficiently

Question

I\'m currently creating a website in python (pyramid) which requires users to sign up and log in. The system allows for users to choose a username which can be a mixture of cap

Answer 1

Accepted answer is dangerous, it will match any string containing the username! Safe option is to match the exact string:

import re
db.stuff.find_one({'name': re.compile('^' + username + '$', re.IGNORECASE)})

Even safer, escape the variable of any special characters which might affect the regex match:

import re
db.stuff.find_one({'name': re.compile('^' + re.escape(username) + '$', re.IGNORECASE)})