Class To JSON Schema Conversion

I am trying to convert my DTO class (Typescript) to JSON schema:

import { IsNumber, IsString } from 'class-validator';
import { classToPlain } from 'class-transformer';

export class TodoDTO {
    @IsNumber()
    id?: number;

    @IsString()
    name?: string;

    @IsString()
    description?: string;
}

let todo = classToPlain(TodoDTO);

console.log('todo=>', todo);

I tried to use two packages class-transformer and class-validator to transform and validate TodoDTO class.

In console it gives output as todo=> [Function: TodoDTO]

Expected output:

"TodoDTO": {
   "type": "object",
   "properties": {
       "id": { "type": "number" },
       "name": { "type": "string" },
       "description": { "type": "string" }
    },
   "required": [ "id", "name", "description" ]
}

I am trying to use TodoDTO class as a json-schema in fastify-typescript.

Any suggestions are welcome.

[kamleshkatpara]

@L2jLiga

Okay, i think i got it now it worked like this:

    @GET({
        url: '/count',
        options: {
            schema: {
                tags: ['Todos'],
                description: 'Returns count of todos',
                querystring: { $ref: 'TodoCountFilterDTO#' },
                response: { 200: TodosCountSchema, 401: { description: 'Unauthorized Access', type: 'object' }, 400: {}, 404: {}, 500: {} },
            } as FastifySchema
        }
    })

Thank you so much 👍🏻

[kamleshkatpara]

Hi,

Now ids (definition ids) are dynamic but still can’t use it

In swagger it shows like params:

I want to it to be like querystring: