nest-typed-config

import { Allow, ValidateNested, IsString, IsNumber } from 'class-validator'; import { Type } from 'class-transformer'; import { Module, Injectable } from '@nestjs/common'; import { TypedConfigModule, fileLoader } from 'nest-typed-config'; // config.ts export class TableConfig { @IsString() public readonly name!: string; } export class DatabaseConfig { @Type(() => TableConfig) @ValidateNested() public readonly table!: TableConfig; } export class RootConfig { @Type(() => DatabaseConfig) @ValidateNested() public readonly database!: DatabaseConfig; @IsString() public readonly appHost!: string; @IsNumber() public readonly appPort!: number; } // app.module.ts (assuming a config.yaml or .env.yaml exists in the root) // Example config.yaml: // database: // table: // name: myapp_main // appHost: localhost // appPort: 3000 @Module({ imports: [ TypedConfigModule.forRoot({ schema: RootConfig, load: fileLoader({ yaml: true, absolutePath: process.cwd(), ignoreEnvFile: false, }), isDevelopment: process.env.NODE_ENV !== 'production', validate: true, }), ], }) export class AppModule {} // app.service.ts @Injectable() export class AppService { constructor(private readonly config: RootConfig) {} getAppInfo(): string { return `Application running at http://${this.config.appHost}:${this.config.appPort} with table: ${this.config.database.table.name}`; } }