使用适用于 Node.js 的 AWS 开发工具包将项目放在 DynamoDB 表上
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Put item on DynamoDB table using AWS SDK for Node.js
提问by yz10
I'm new to javascript and node.js and was wondering if someone can help me figure out the syntax of putting a new item onto an existing table on AWS Dynamodb through their node.js SDK. Here's what I have so far. Is there an example for what I'm trying to do? If anyone could point me in the right direction, it'd be much appreciated.
我是 javascript 和 node.js 的新手，想知道是否有人可以帮助我弄清楚通过他们的 node.js SDK 将新项目放在 AWS Dynamodb 上的现有表上的语法。这是我到目前为止所拥有的。有没有我想要做的例子？如果有人能指出我正确的方向，我将不胜感激。
var AWS = require('aws-sdk');
AWS.config.loadFromPath('./config.json');
AWS.config.update({region: 'us-east-1'});
var dynamodb = new AWS.DynamoDB();
var item = {
// I need to put the an item with a the primary key of "id", and an attribute called "item"
// I'm new to js and node.js, so if somebody could help me understand the documentation
// http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/frames.html#!http%3A//docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB_20120810.html
}
dynamodb.putItem({TableName: 'log_dev', Item: item}, function(err, data){
if (err) {
console.log(err); // an error occurred
} else {
console.log(data); // successful response
}
});
回答by Anki007
dynamoDB.putItem(
{
"TableName": "Table1",
"Item": {
"Color": {"S": "white"},
"Name": {"S": "fancy vase"},
"Weight": {"N": "2"},
"LastName":{"S": "Kumar"}
}
}, function(result) {
result.on('data', function(chunk) {
console.log("" + chunk);
});
});
console.log("Items are succesfully ingested in table ..................");
回答by muhqu
I expect your "id" to be numeric...
我希望你的“id”是数字......
var item = {
"id": {"N": 1234},
"title": {"S": "Foobar"}
}
Note that with DynamoDB you specify the data type (N? numeric, S? string, B? binary) at table creation, only for the primary key (HashKeyor HashKey+RangeKey). All other columns are allowed to vary in their data type, and can be seen as key-value pairs. So it is essential for DynamoDB to always encode the data type with the item attributes.
请注意，使用 DynamoDB，您可以在创建表时指定数据类型（N? 数字、S? 字符串、B? 二进制），仅用于主键（HashKey或HashKey+RangeKey）。所有其他列的数据类型都允许变化，并且可以视为键值对。因此，DynamoDB 必须始终使用项目属性对数据类型进行编码。
回答by Ryan Zhou
I don't think muhqu's answer works, I believe the value of the attribute has to be a string.
我不认为 muhqu 的答案有效，我相信该属性的值必须是一个字符串。
var item = {
"id": {"N": "1234"},
"title": {"S": "Foobar"} }
http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB.html#putItem-property
http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB.html#putItem-property
