AWS - 所需键之一未指定值 [英] AWS - One of the required keys was not given a value

问题描述

AWS 新手，试图将数据放入表中.阅读文档并尝试遵循示例后，我遇到了此验证错误.

New to AWS, trying to put data into a table. After reading the documentation and trying to follow examples I am running into this validation error.

One of the required keys was not given a value

我的代码:

var conf = require("/directory");
var AccessKey = 'supersecretkey';
var SecretKey = 'supersecretkey';

var tableName = conf.tableCS;

var AWS = require('aws-sdk');

console.log("Endpoint: " + conf.endpoint);
AWS.config.update({
    accessKeyId: AccessKey,
    secretAccessKey: SecretKey,
    region: conf.region,
    endpoint: conf.endpoint
});
var docClient = new AWS.DynamoDB.DocumentClient();

var file = process.argv[2];
console.log("File: " + file);

var csv = require("fast-csv");

csv.fromPath(file)
    .on("data", function(data) {
        // Uncomment to see CSV data
        // console.log(data);

        var arrayLength = data.length;
        for (var i = 0; i < arrayLength; i++) {
            // console.log(data[i]);
            var params = {
                TableName: tableName,
                Key: {
                       RefID: data
                }
            };

            console.log("Adding a new item...");
            docClient.put(params, function(err, data) {
                if (err) {
                    console.error("Unable to add item. Error JSON:", JSON.stringify(err, null, 2));
                }
                else {
                    console.log("Added item:", JSON.stringify(data, null, 2));
                }
            });
            // Looping through, now putItem into database
        }

    })
    .on("end", function() {
        console.log("done");
    });

我找到了 这个，但我不理解 range 关键部分.我正在以下代码中创建表，并且有 hash 键，但没有 range 键.那是我的问题吗?我将如何制作范围键?

I found this, but am not understanding the range key part. I'm creating the table in this following code and have the hash key, but not a range key. Is that my issue? What would I make the range key?

var conf = require("/directory");
var AccessKey = 'supersecretkey';
var SecretKey = 'supersecretkey';

var tableName = conf.tableCSV;

// Take input from command line
process.argv.forEach(function(val, index, array) {
    console.log(index + ': ' + val);
});

console.log("Table: " + tableName);

var AWS = require('aws-sdk');

console.log("Endpoint: " + conf.endpoint);
AWS.config.update({
    accessKeyId: AccessKey,
    secretAccessKey: SecretKey,
    region: conf.region,
    endpoint: conf.endpoint
});
var dynamodb = new AWS.DynamoDB();

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

dynamodb.createTable(params, function(err, table) {
    if (err) {
        console.log(err);
    }
    else {
        console.log("TABLED CREATED");
        console.log(table);
    }
});

推荐答案

在表定义中，您将键命名为 Ref-ID，但在 put 操作中，您将键命名为 Info.如果您的表有一个名为 Ref-ID 的哈希键，那么您插入的每条记录都需要 Ref-ID 的值.

In the table definition, you named the key Ref-ID but in your put operation you are naming the key Info. If your table has a hash key named Ref-ID then every record you insert will require a value for Ref-ID.

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