DynamoDB: Attribute Not Null (Guide w/ Code Examples)

In the AWS JavaScript SDK, you can set an attribute to be not null by including it in the Attribute_definitions field when creating a table, and setting its nullable property to false.

Additionally, you can use the update method to update the attribute and set the NULL action to NOT_NULL in the Attribute_updates field. Below is an example of how to create a table with a non-null attribute:

var AWS = require('aws-sdk');
var dynamodb = new AWS.DynamoDB({apiVersion: '2012-08-10'});

var params = {
  AttributeDefinitions: [
    {
      AttributeName: 'example',
      AttributeType: 'S',
    },
  ],
  KeySchema: [
    {
      AttributeName: 'example',
      KeyType: 'HASH',
    },
  ],
  ProvisionedThroughput: {
    ReadCapacityUnits: 1,
    WriteCapacityUnits: 1,
  },
  TableName: 'example_table',
};

dynamodb.createTable(params, function(err, data) {
  if (err) {
    console.log("Error", err);
  } else {
    console.log("Success", data);
  }
});