1let AWS = require('aws-sdk');
2let util = require('util');
3
4AWS.config.update({
5    region: 'us-east-1'
6});
7
8let connection = new AWS.DynamoDB.DocumentClient();
9
10let params = {
11    TableName: 'user_details',
12    KeyConditionExpression: 'user_id = :user_id and user_relation begins_with :user_relation',
13    ExpressionAttributeValues: {
14        ':user_id': "1234",
15        ':user_relation': "followed-by"
16    }
17};
18
19console.log('getQuery Params => ', params);
20let dynamoDb = util.promisify(connection.query).bind(connection);
21let results = await dynamoDb(params);
22console.log('results => ', results);
23

1const params = {
2  TableName: 'user_details',
3  KeyConditionExpression: '#user_id = :user_id and begins_with(#user_relation, :user_relation)',
4  ExpressionAttributeNames:{
5    "#user_id": "user_id",
6    "#user_relation": 'user_relation'
7  },
8  ExpressionAttributeValues: {
9    ":user_id": "1234",
10    ":user_relation": "followed-by"
11  }
12}
13