Nodejs api aws postgresql1/8/2023 You are also not limited to a single database per API or even per API request. One of the strengths of AppSync is that it is database agnostic – because the resolvers are just functions, the service integrates well with any database within AWS or elsewhere using either direct resolvers or Lambda resolvers (which we will be using in this tutorial). In my last post I showed how to use AWS CDK to deploy AWS AppSync as a real-time API layer integrated with Amazon DynamoDB. With AppSync, developers can build scalable applications on a range of data sources, including Amazon DynamoDB NoSQL tables, Amazon Aurora Serverless relational databases, Amazon OpenSearch Service (successor to Amazon Elasticsearch Service) clusters, HTTP APIs, and serverless functions powered by AWS Lambda. See details.ĪWS AppSync is a managed serverless GraphQL API service that simplifies application development by letting you create a flexible interface to securely access, manipulate, and combine data from one or more data sources with a single network call and API endpoint. Src/config/database.ts import from '.September 14, 2021: Amazon Elasticsearch Service has been renamed to Amazon OpenSearch Service. Here we are reading the database host, port, name from the environment variables which we are passing through the docker-compose.yml file. We will be keeping all database related config in this file. docker-compose buildĬreate a database.ts file in the config directory. Here we are using a database called express-ts and using postgres as username and password to connect the database from the REST server. In the docker-compose.yml file, we are adding a database service named db using postgres images and adding it as a dependency to the app service. We will be using a local database server for this app, and instead of installing and running sever on our machine, we will using docker to do that. You can use a remote server or a local server. We need a Postgres database server to connect from our REST server. npm install typeorm reflect-metadata -save ![]() We also need to install Postgres driver pg to our project. Let's install typeorm and reflect-metadata as dependencies to our project. We will be using TypeORM because it has better TypeScript support at this time. There are multiple ORMs for Nodejs like Sequelize, Bookshelf, and TypeORM. But sometimes for some complex operations, ORM queries tend to be slow, in those conditions it is better to write raw queries. Like ORM provides an abstraction over raw queries, which speeds up the development. ![]() There are some advantages and tradeoffs of using ORM. And some people prefer to use ORM to connect and query the database engine. Some people prefer to connect database engine directly and make raw SQL Queries. There are many ways to handle the database from the app. That's why we are using a relational database for the server. In this sample app, there will be few entities that will have relations with each other. ![]() You can choose any database as per requirements. We will be using PostgreSQL for the database. In this post, we will be extending the REST API server by setting up the database connection and adding some APIs. In this post, we will set up a PostgreSQL database and add some APIs to the server. ![]() In the previous post, we have dockerized the Express and TypeScript REST API server.
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