How to best support typing for dictionary

[xinghul]

Is your feature request related to a problem? Please describe.
Feature request/question. I have an InputType named Filters, right now I want to create another InputType called FiltersByName, the interface is like this:

interface IFiltersByName = Record<string, Filters>;

// or 

interface IFiltersByName {
  [name: string]: Filters;
}

Question
How do I type the FiltersByName for type-graphql?

@InputType()
class FiltersByName implements IFiltersByName {
  ...?
}

I understand this might be a limitation of graphql scheme itself, but would appreciate it in case you know a better solution.

Describe alternatives you've considered
Right now I'm using GraphQLJSONObject for FiltersByName, which is not ideal:

@Query(() => any)
public async getAllCount(
  @Arg('params', () => GraphQLJSONObject) params: IFiltersByName,
) {
...
}

[MichalLytek]

I always recomend such pattern:

@InputType()
class FilterValueInput {
  @Field()
  key: string;

  @Field()
  value: Filter;
}

// ...

@Query(() => Foo)
public async getAllCount(
  @Arg('params', () => [FilterValueInput]) params: [FilterValueInput],
) {
  // ...
}

So you can then send filter values as:

query {
  getAllCount(params: [{ key: 'foo', value: BAR }, { key: 'bar', value: FOO }]) {
    # ...
  }
}