GURD-dynamo-node-demo.js

// https://docs.aws.amazon.com/zh_cn/sdk-for-javascript/v2/developer-guide/dynamodb-example-document-client.html
// Load the AWS SDK for Node.js
var AWS = require('aws-sdk');

AWS.config.loadFromPath('./config.json');

// Create DynamoDB document client
var docClient = new AWS.DynamoDB.DocumentClient({ apiVersion: '2012-08-10' });
deleteItem();

// Get item
function getItem() {
  var params = {
    TableName: 'Room',
    Key: {
      'name': 'room2'
    }
  };

  docClient.get(params, function (err, data) {
    if (err) {
      console.log("Error", err);
    } else {
      console.log("Success", data.Item);
    }
  });
}

// Query 
function query() {
  var params = {
    TableName: 'Room',
    ExpressionAttributeNames: {
      "#na": "name"
    },
    ExpressionAttributeValues: {
      ':roomName': 'room2'
    },
    KeyConditionExpression: '#na = :roomName',
  };

  docClient.query(params, function (err, data) {
    if (err) {
      console.log("Error", err);
    } else {
      console.log("Success", data.Items);
    }
  });
}

// Create
function create() {
  var params = {
    TableName: 'Room',
    Item: {
      'name': 'room5',
      'apiKey': '46038192'
    }
  };

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

// Delete 
function deleteItem(){
  var params = {
    Key: {
      'name': 'room5'
    },
    TableName: 'Room'
  };
  
  docClient.delete(params, function(err, data) {
    if (err) {
      console.log("Error", err);
    } else {
      console.log("Success", data);
    }
  });
}