How To Dev

Introduction The Request-Response Lifecycle in NestJS is a clearly defined sequence of steps that a request must pass through before a response is sent back to the client. Simply put, it is like a production line: each department has its own task to check, transform, or process the data. Key Components The typical execution order is as follows: Incoming Request: The request sent from the client. Middleware: Performs tasks such as logging, basic authentication, or modifying the request object. Guards: Responsible for security, deciding whether this request is allowed to proceed (Authentication/Authorization). Interceptors (Pre-controller): Allows you to intervene in the logic before it reaches the Controller. Pipes: Used for data transformation (Transformation) and validating the input data (Validation). Controller: Where the main business logic resides and processes the request. Interceptors (Post-controller): Processes the data after the Controller returns it (e.g., changing the JSON ...

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...