Query condition missed key schema element : Validation Error

Question

I am trying to query dynamodb using the following code:

const AWS = require(\'aws-sdk\');

let dynamo = new AWS.DynamoDB.DocumentClient({
  serv         


        

Answer 1

i solved the problem using AWS.DynamoDB.DocumentClient() with scan, for sample (nodejs):

var docClient = new AWS.DynamoDB.DocumentClient();
var params = {
        TableName: "product",
        FilterExpression: "#cg = :data",
        ExpressionAttributeNames: {
            "#cg": "categoria",
        },

        ExpressionAttributeValues: {
             ":data": category,
        }
    };

docClient.scan(params, onScan);

    function onScan(err, data) {
        if (err) {
            // for the log in server
            console.error("Unable to scan the table. Error JSON:", JSON.stringify(err, null, 2));
            res.json(err);
        } else {

            console.log("Scan succeeded.");
            res.json(data);

        }
    }