Create Collections In MongoDB using Python

In MongoDB, Collections are created implicitly when we insert documents into them.

To create a collection in MongoDB using "pymongo" library, which provides tools to interact with MongoDB databases.

However, we can also explicitly create collections using Python and the "pymongo" library.

Here's how we can create a collection in MongoDB using Python:

Install pymongo library:

pip install pymongo

Collection Configuration:

After importing "pymongo", we must provide a connection URL and database name to MongoClient.

Example:

# import pymongo library
import pymongo

# Connection URL and database name
uri = "mongodb://localhost:27017/"

database_name = "your_database_name"
collection_name = "your_collection_name"

# Connect to MongoDB server
client = pymongo.MongoClient(uri)

# Access or create the database
selectedDB = client[database_name]

# Access or create the collection
collection = selectedDB[collection_name]

Replace "mongodb://localhost:27017/" with the connection string for your MongoDB server.
Replace "your_database_name" with the name of the database where you want to create the collection.
Replace "your_collection_name" with the name of the collection you want to create.
The "list_collection_names()" method is used to get a list of all collection names in the specified database.
If the specified collection name exists, it prints a message indicating that the collection already exists. Otherwise, it prints a message indicating that the collection does not exist.
Finally, it accesses or creates the specified collection using the "selectedDB[collection_name]" syntax.

Check Collections in Specific Database:

To Check if the collection exists from mongoClient using `selectedDB.list_collection_names()` method.

Example:

if collection_name in selectedDB.list_collection_names():
    print(f"The collection '{collection_name}' already exists.")
else:
    print(f"The collection '{collection_name}' does not exist.")

Insert Data In Collection:

Insert a document into specific 'collection' using the insert_one() method.

Example:

document = {'name': 'Alice', 'age': 33}
collection.insert_one(document)

print("Collection created and document inserted successfully.")

Check Databases and Collections In Database:

Example:

# show databases will list all databases
show dbs;

# check for collections within databases
show collections

<-- Create Database

Insert Document -->