serverless dynamodb with api gateway

Author: Dipjyoti Metia

my-service/package-lock.json

@@ -0,0 +1,6 @@
+# package directories
+node_modules
+jspm_packages
+
+# Serverless directories
+.serverless

serverless-dynamodb/.gitignore

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+'use strict';
+
+module.exports.hello = async (event, context) => {
+  return {
+    statusCode: 200,
+    body: JSON.stringify({
+      message: 'Go Serverless v1.0! Your function executed successfully!',
+      input: event,
+    }),
+  };
+
+  // Use this code if you don't use the http event with the LAMBDA-PROXY integration
+  // return { message: 'Go Serverless v1.0! Your function executed successfully!', event };
+};

serverless-dynamodb/handler.js

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+{
+  "name": "serverless-dynamodb",
+  "version": "1.0.0",
+  "description": "",
+  "main": "handler.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "Dipjyoti Metia",
+  "license": "ISC",
+  "dependencies": {
+    "uuid": "^2.0.3",
+    "aws-sdk": "2.350.0"
+  }
+}

serverless-dynamodb/package-lock.json

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+'use strict';
+
+const uuid = require('uuid');
+const AWS = require('aws-sdk'); // eslint-disable-line import/no-extraneous-dependencies
+
+const dynamoDb = new AWS.DynamoDB.DocumentClient();
+
+module.exports.create = async (event, context, callback) => {
+  const timestamp = new Date().getTime();
+  const data = JSON.parse(event.body);
+  if (typeof data.petName !== 'string' || typeof data.petBreed !== 'string') {
+    console.error('Validation Failed');
+    callback(new Error('Couldn\'t create the pet item.'));
+    return;
+  }
+
+  const params = {
+    TableName: process.env.DYNAMODB_TABLE,
+    Item: {
+      id: uuid.v1(),
+      petName: data.petName,
+      petBreed: data.petBreed,
+      createdAt: timestamp,
+      updatedAt: timestamp,
+    },
+  };
+
+  dynamoDb.put(params, (error) => {
+    if (error) {
+      console.error(error);
+      callback(new Error('Couldn\'t create the pet item.'));
+      return;
+    }
+    const response = {
+      statusCode: 200,
+      body: JSON.stringify(params.Item),
+    };
+    callback(null, response);
+  });
+};