@Input()

The @Input() decorator extracts the validated procedure input and injects it into a method parameter.

Basic Usage

import { Input, Mutation, Router } from 'nest-trpc-native';
import { z } from 'zod';

const CreateCatSchema = z.object({ name: z.string().min(1) });

@Router('cats')
class CatsRouter {
  @Mutation({ input: CreateCatSchema })
  create(@Input() input: { name: string }) {
    return { id: '1', ...input };
  }
}

Extracting Nested Properties

Pass a property path to extract a specific field from the input:

@Mutation({ input: z.object({ name: z.string(), age: z.number() }) })
create(@Input('name') name: string) {
  // `name` is directly the string value
  return { id: '1', name };
}

Without Zod (class-validator)

@Input() also works with class-validator DTOs when combined with @UsePipes():

import { UsePipes, ValidationPipe } from '@nestjs/common';
import { IsString, MinLength } from 'class-validator';

class CreateCatDto {
  @IsString()
  @MinLength(1)
  name!: string;
}

@Mutation()
@UsePipes(new ValidationPipe({ whitelist: true }))
create(@Input() input: CreateCatDto) {
  return { id: '1', ...input };
}