PyMongo .find(data) 返回所有带有键和值的对象

Question

I have a database with orders, I want to search for data = {"user": "Bob"} and return all documents with data .

I tried doing

data = {"user": "Bob"}
order_list = orders.find(data)
for order in order_list:
    print(order)

but it just gives back an empty cursor, when I do list(orders.find(data)) it's empty.

Answer 1

Make sure you are connecting to right database. If you don't specify a database, the default database of test will be used. I would recommed always declaring a db variable with the specific database selected as per mydatabase in this example:

from pymongo import MongoClient

db = MongoClient()['mydatabase']
orders = db.orders

data = {"user": "Bob"}

orders.insert_one(data)

order_list = orders.find(data)
for order in order_list:
    print(order)

prints:

{'_id': ObjectId('5fba78111e5694dd7fddbe3d'), 'user': 'Bob'}