Objective: This segment introduces how to insert and retrieve the documents from a collection in MongoDB using Python.
Prerequisites: PyMongo is installed, and MongoDB is up and running in the background. If not, then refer to the Python Database Connectivity segment in sequence.
Start MongoDB
kodingwindow@kw:~$ sudo systemctl start mongod
kodingwindow@kw:~$ mongosh
Current Mongosh Log ID: 65154469633b7d0fc9cad531
Connecting to: mongodb://127.0.0.1:27017/?directConnection=true&serverSelectionTimeoutMS=2000&appName=mongosh+2.2.5
Using MongoDB: 7.0.9
Using Mongosh: 2.2.5
For mongosh info see: https://docs.mongodb.com/mongodb-shell/
...
test> show dbs
admin 0.000GB
config 0.000GB
local 0.000GB
Python MongoDB to insert and retrieve the documents from a collection
In the following program, database and collection automatically get created. If database and collection already exist in MongoDB, then new documents will get inserted into an existing collection.
test> show dbs
DB 0.000GB
admin 0.000GB
config 0.000GB
local 0.000GB
test> use DB
switched to db DB
DB> db.getCollectionNames()
[ "holders" ]
DB> db.holders.find().pretty()
[
{
_id: ObjectId('662dff2171fef7fb94353a22'),
account_no: Long('2562348989'),
name: 'James Moore',
bank: 'Barclays',
amount: 5000
},
{
_id: ObjectId('662dff2171fef7fb94353a23'),
account_no: Long('2562348990'),
name: 'Donald Taylor',
bank: 'Citi',
amount: 7000
},
{
_id: ObjectId('662dff2171fef7fb94353a24'),
account_no: Long('2562348991'),
name: 'Edward Parkar',
bank: 'ICICI',
amount: 95000
}
]
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