```typescript
@Resolver(of => Recipe)
export class RecipeResolver {
  constructor(
    private readonly recipeRepository: Repository<Recipe>,
    private readonly rateRepository: Repository<Rate>,
  ) {}

  @Query(returns => Recipe)
  async recipe(@Arg("recipeId") recipeId: string) {
    return this.recipeRepository.findOneById(recipeId);
  }

  @Mutation(returns => Recipe)
  async addRecipe(@Arg("recipe") recipeInput: RecipeInput) {
    const newRecipe = this.recipeRepository.create(recipeInput);
    return this.recipeRepository.save(newRecipe);
  }

  @FieldResolver()
  ratings(@Root() recipe: Recipe) {
    return this.rateRepository.find({ recipeId: recipe.id });
  }
}
```
