How to insert Document into MongoDB?

Contents

Introduction
Example
Insert Multiple Documents into MongoDB Collection

PyMongo – Insert Document to MongoDB using Python

To insert a document to MongoDB Collection in Python language, we use PyMongo and follow these steps.

Create a client to the MongoDB instance.
Provide the name of the database to the client. It returns a reference to the Database.
Provide your new collection name as index to the database reference.
It returns a reference to the Collection.
Use insert_one() method on the collection and pass a dictionary as argument to the function.

A quick code snippet to insert one document to MongoDB using Python is:

x = mycollection.insert_one({'key1':'value1', 'key2':'value2'})

Run

Example

In the following example, we are inserting a document to the collection named “developers”.

import pymongo

myclient = pymongo.MongoClient("mongodb://localhost:27017/")

#use database named "organisation"
mydb = myclient["organisation"]

#use collection named "developers"
mycol = mydb["developers"]

#dictionary as a document
dict = { "name": "Kiku", "address": "Germany" }

#insert a document to the collection
x = mycol.insert_one(dict)

#id returned by insert_one
print("Document inserted with id: ", x.inserted_id)

print("\nDocuments in developers collection\n----------------------------------")
#print all the documents in the collection
for x in mycol.find():
  print(x)

Run

Note: Make sure that you provide the name of the database and collection correctly. Otherwise, a new database or collection would be created if it does not exist already. And all this happens without any warning that the database or collection is not present.

Insert Multiple Documents into MongoDB Collection

You can use insert_many() function to insert a list of documents. insert_many() takes Python List as an argument and inserts those documents in the collection.

In the following example, we have selected developers collection of organisation database. Then we initialized a list with multiple documents. We passed the list to insert_many() function and it does the job.

import pymongo

myclient = pymongo.MongoClient("mongodb://localhost:27017/")

#use database named "organisation"
mydb = myclient["organisation"]

#use collection named "developers"
mycol = mydb["developers"]

#list of documents
list = [{ "name": "Kiku", "address": "Germany" },
		{ "name": "Lini", "address": "Sweden" },
		{ "name": "Sree", "address": "India" },
		{ "name": "Raghu", "address": "India" },
		{ "name": "Mams", "address": "France" }]

#insert multiple documents
x = mycol.insert_many(list)

print('ids of inserted documents\n---------------------')
for id in x.inserted_ids:
	print(id)

Run

insert_many() function returns the list of document ids that are inserted to the collection. You can store them in a variable and access them.