All FieldsResolver in my project returning null

[igorwessel]

Hello!
My english is very bad, so in advance sorry for english =D

I don't why FieldsResolver is returning null because i don't update anything in project
@FieldResolver(() => Tools, { nullable: true }) async tools(@Root() ninja: Ninja, @Ctx() { loaders: { ninjaToolLoader } }: IGraphQLContext): Promise<Tools[]> { const tools: Tools[] = await ninjaToolLoader.load(ninja.id); return tools; }

When I do a test with a request return null

I spent the whole morning and afternoon trying to solve it but I couldn't :/

[MichalLytek]

Have you tried returning dummy data directly, skipping the loader/database code?

[MichalLytek]

It should be @FieldResolver(() => [Tools]. Use [Brackets] to mark field as returning array.

[MichalLytek]

You should return error apart from null in data from nullable field.

[igorwessel]

Ok! I was returning an empty array when I had no tools, I will try to figure out how to return an error apart.
And i changed the code to

@FieldResolver(of => [Tools])

async tools(@Root() ninja: Ninja, @Ctx() { loaders: { ninjaToolLoader } }: IGraphQLContext): Promise<Tools[]> {

	const tools: Tools[] = await ninjaToolLoader.load(ninja.id);
	return tools;
}

But don't work yet, it was working, I don't know if there was any dependency that updated and ended up causing this strange problem

[MichalLytek]

You can also try to do @Resolver(() => Ninja).
If you want me to help, create a minimal reproducible code example, without dataloaders, database and other deps. One resolver, one class, simple setup.

[igorwessel]

thanks for trying to help!
I redid my repository from what I had in my github, installed the dependencies putting to not update. And it worked!
I'm going to try to find out now which updated dependency caused to break FieldsResolvers