class-transformer | Decorator-based transformation serialization | JSON Processing library

I'm trying to use class-validator and class-transformer to perform validation on API requests in a Next.js API route.

I've put together this basic API handler to demonstrate:

I am trying to add an Abstract method to serialize my response objects in order to hash the id's. That would require to have a property-based injection in order to not pass lots of variables through the constructor.

The class that will be used to Serialize :

It's 3 days i am on this problem of E2E tests on my GraphQL application with NestJS + Apollo / Express.

When I am running my app with serverless offline or directly with my main file, it's working perfectly. I have my graph and all things I need :)

But, when I am running E2E tests with Jest, I received an error from the await app.init() inside the beforeEach.

After playing with the package.json and dependencies, the error throwed is TypeError: (0 , schema_1.makeExecutableSchema) is not a function.

Someone have any idea please ? I am totally blocked ... :(

I'm using Nest.js with Typeorm and library class-transformer:

Folks, I've been trying to implement an application using angular with angular universal and NestJs. I believe that is possible to seize the nest server not only for SSR, but also to also provide API endpoints.

I've made the setup recommended on https://github.com/nestjs/ng-universal using ng add @nestjs/ng-universal, pretty standard. After that I added my code to the angular src folder and installed the needed dependencies.

The problem is that when I try to import a module to nest app.module, I get the following error: Error: Module not found: Error: Can't resolve 'class-transformer/storage'

I've tried to use webpack, but since my knowledge on webpack is petty, the results were failure after failure, as expected.

First, is it possible to seize the server also to provide endpoints? Second, what should I do to resolve this module?

Please find below the repository for reproducing the issue:

https://github.com/vitordhers/universal-nest

Thanks in advance

I'm working on a NestJs app with graphql, and I'm trying to sanitize my resolvers inputs with class-transformer like this :

I'm using nestjs with class validator to validate env variables, configuration.service.ts is getting its values from configService file which get what it needs from .env and put it in a json object.

In the port and timeout properties I expect to receive a string since it came from a .env file, the decorator @Type(() => Number) will try to convert whatever it receives into a Number. As far I'm concerned, the decorator only runs as the function call ends, so the function takes a string and returns a string and after that the string is casted into a Number.

The problem is the properties port and connectTimeoutMS expects a Number, the typescript lint claims it's receiving a string, looks like it's not recognizing the cast decorator. I want to know whether there's a way to get around this or I have to drop the cast decorator.

configuration.service.ts

I have a Dto which looks like this:

I'm currently working on a NestJS Project in which i have to store loads of data in a single database table. so i created an entity, a repository, a dto and the route in order to store everything. my dto is, just as my entity, extremely long and packed with alot of variables i have to store. pretty much every variable in my dto is optional and in the entity everything is nullable so i have to verify wether that value exists or not before creating a dataset for it.

my entity: