HTTP decorators bind controller methods to specific HTTP methods and paths.

Available Decorators

Decorator	HTTP Method
@Get(path?)	GET
@Post(path?)	POST
@Put(path?)	PUT
@Patch(path?)	PATCH
@Delete(path?)	DELETE
@Options(path?)	OPTIONS
@Head(path?)	HEAD
@All(path?)	All methods

Usage

import { t } from "elysia";
import { Controller, Get, Post, Put, Delete, Body, Ctx } from "nestelia";

@Controller("/posts")
class PostController {
  @Get("/")
  findAll() {
    return this.postService.findAll();
  }

  @Get("/:id")
  findOne(@Ctx() ctx: any) {
    return this.postService.findById(ctx.params.id);
  }

  @Post("/")
  create(@Body(t.Object({ title: t.String(), content: t.String() })) body: { title: string; content: string }) {
    return this.postService.create(body);
  }

  @Put("/:id")
  update(@Ctx() ctx: any, @Body(t.Object({ title: t.Optional(t.String()) })) body: { title?: string }) {
    return this.postService.update(ctx.params.id, body);
  }

  @Delete("/:id")
  remove(@Ctx() ctx: any) {
    return this.postService.remove(ctx.params.id);
  }
}

Path Parameters

Paths support Elysia's route parameters using :param syntax:

@Get("/:category/:id")
findByCategory(@Ctx() ctx: any) {
  const { category, id } = ctx.params;
  return this.service.find(category, id);
}

For validated params, use the @Param() decorator with a TypeBox schema:

import { t } from "elysia";

@Get("/:id")
findOne(@Param(t.Object({ id: t.Numeric() })) params: { id: number }) {
  return this.service.findById(params.id);
}

Wildcard Routes

Use @All() to match any HTTP method:

@All("/health")
health() {
  return { status: "ok" };
}

No Path Argument

When no path is provided, the method matches the controller's prefix:

@Controller("/users")
class UserController {
  @Get()  // matches GET /users
  findAll() { /* ... */ }
}

Response Status and Headers

Use @HttpCode() and @Header() decorators on route methods:

@Post("/")
@HttpCode(201)
@Header("Location", "/users/1")
create(@Body(t.Object({ name: t.String() })) body: { name: string }) {
  return this.userService.create(body);
}

Route Metadata

Under the hood, each decorator stores metadata via reflect-metadata:

• ROUTE_METADATA — the HTTP method and path
• PARAMS_METADATA — parameter extraction instructions
• ROUTE_SCHEMA_METADATA — TypeBox validation schemas

This metadata is read at bootstrap time to register routes on the Elysia instance.