Adding an Attribute that does not exist into DynamoDb

Question

If user enters an attribute that does not exist in Dynamodb, accept the attribute and store into Dynamodb.

Currently, I have 'id' and 'firstName' as the attributes and user can create by inserting their firstName however, if they want to add a 'lastName' attribute, dynamodb should accept the 'lastName' and store into the database.

def create(event):
    body = dict(event['body'])
    id = body['id']
    firstName = body['firstName']

    response = table.put_item(
        Item={
            'id': str(id),
            'firstName': firstName,
        },
    )

Hi, your post does not include a question. You should clearly state what you have tried, how it failed, and what you need help with. — jarmod
– jarmod, Commented Sep 22, 2017 at 13:00

notionquest · Accepted Answer · 2017-09-22 12:07:46Z

2

DynamoDB is a NoSQL database. This is the default feature in most of the NoSQL databases. This is supported in DynamoDB as well. Like RDBMS, the NoSQL database doesn't have any schema. You can add any non-key attributes anytime.

With respect to DynamoDB, while creating the table, it doesn't allow to define any non-key attributes. The lastName is a non-key attribute. It can be added to the item (i.e. record) at any time after you create the item (or) while creating the new item. This is one of the main advantages of NoSQL or DynamoDB database.

UpdateExpression = 'SET lastName = :lastNameVal',   
ExpressionAttributeValues={':lastNameVal' : 'John'}

Reference link

edited Sep 22, 2017 at 12:07

answered Sep 22, 2017 at 11:58

notionquest

39.4k6 gold badges120 silver badges112 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Adding an Attribute that does not exist into DynamoDb

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related