How To Dev

Introduction This is a comprehensive page about the technologies I have shared in series format. You can view brief introductions and links to directly access each series you are interested in. In the field of software development, to deploy a product from the initial idea to its release, the standard process typically involves several stages as follows: Database : Designing and implementing the database according to business requirements, storing data during the system's operation. Backend : Handling the main logic of the system, communicating with the database and services. Frontend : Building the interface for users to interact with the system, which could be a desktop, mobile, or web application. This usually includes implementing UI/UX and integrating APIs from the backend. DevOps : Deploying the system for use, which can be done on a server or in the cloud. Testing : Applying testing methods to ensure the product meets the standards for release. Of course, these are just stan...

Introduction @snaplet/seed is a highly powerful library that supports automatic mock data generation for databases based on the Prisma schema. Instead of manually writing hundreds of lines of complex insert code, @snaplet/seed automatically analyzes relations in the database to generate logical, consistent and data-integrity-assured data. Standout advantages include the ability to automatically reset the database, inherently understand foreign key constraints and support concise syntax for easily creating nested data structures. Prerequisites This article is used alongside Prisma in a NestJS project, I will not specifically mention how to set up Prisma anymore, you can review the previous article to have the necessary preparation before proceeding Detail First, install the package yarn add -D @snaplet/seed Then, add the following scripts to package.json { "scripts" : { "seed:init" : "npx @snaplet/seed init prisma/seed" , "seed:sync...

Introduction Prisma is a next-generation ORM (Object-Relational Mapping) for NodeJS and TypeScript. It helps developers interact with databases intuitively and in a type-safe manner. Prisma possesses many outstanding advantages, including the ability to automatically generate optimal queries, automate the data migration process, provide powerful code auto-completion, and minimize runtime errors thanks to TypeScript's strict type-checking system. Compared to TypeORM, Prisma delivers a superior development experience thanks to a centralized, readable, and maintainable schema structure within a single file (schema.prisma). Instead of having to define complex Entity classes with multiple decorators like TypeORM, Prisma automatically generates Prisma Client based on the schema, ensuring absolute synchronization between the database and code. Additionally, Prisma's Rust-based query engine mechanism helps optimize data query performance with PostgreSQL more effectively, naturally avoi...

Introduction In my previous article, I provided a basic guide on initializing and using AWS DynamoDB, but in this article, we will delve deeper into QueryCommand. In AWS DynamoDB, the Query method allows you to search for data based on the primary key (Partition Key) and filter conditions (Sort Key). To optimize performance and cost, DynamoDB supports a Pagination mechanism through the ExclusiveStartKey and LastEvaluatedKey parameters. Applying pagination not only reduces the data transfer load but also enables the application to handle large data tables smoothly, ensuring system stability. Detail Use AWS CDK to create the file lib/dynamodb-gsi-stack.ts import * as cdk from "aws-cdk-lib" import * as dynamodb from "aws-cdk-lib/aws-dynamodb" import { Construct } from "constructs" export class DynamoDbGsiStack extends cdk . Stack { constructor ( scope : Construct , id : string , props ?: cdk . StackProps ) { super (scope, id, props) ...