How can I use the find_one() function with the _id key?

Question

Let's say I have a MongoDB database where I want to check whether a user is logged in or not by using a cookie with the ID of an entry in the users database. For simplicity, let's have it as a simple variable foo = bar .

How can I do a find_one() query to the database using the _id as the query item?

Here's an example of what I have in mind, in code:

foo = bar
userLoggedIn = users.find_one({'_id':ObjectId(foo)})
print(userLoggedIn)

Answer 1

Make sure you're importing ObjectId by including the following in your file: from bson.objectid import ObjectId .