How to get the grandparent data in resolver graphql? - rest

Question

I'm new to GraphQL. I am wrapping a REST API wiht GraphQL, my problem is that I don't get the
ingredients of restaurant dishes (grandparents), just get the ingredients of a dish (parents) .This is my schema
type Restaurant{
id_restaurant: String
name: String
dishes:[Dish]
}
type Dish{
id_dish: String
name: String
ingredients:[Ingredient]
}
type Ingredient{
id_ingredient: String
name: String
}
type Query{
restaurants: [Restaurant]
dishes: [Dish]
ingredients: [Ingredient]
}
These are my resolvers
const mainURL = `https://my_apy_example`
const resolvers = {
Query: {
restaurants: () => { return fetch(`${mainURL}/restaurants`).then(res => res.json()) },
dishes: () => { return fetch(`${mainURL}/dishes`).then(res => res.json()) },
ingredients: () => { return fetch(`${mainURL}/ingredients`).then(res => res.json()) },
},
Restaurant: {
dishes: parent => {
const { id_restaurant } = parent
return fetch(`${mainURL}/dishes?id_restaurant=${id_restaurant}`).then(res => res.json())
},
},
Dish: {
ingredients: parent => {
const { id_dish } = parent
return fetch(`${mainURL}/ingredients?id_dish=${id_dish}`).then(res => res.json())
},
},
}
I assumed that the Dish resolver also resolved the dishes of Restaurant but I think I need other resolver for this, I was wrong.
This query doesn't show the ingredients
query{
restaurants{
name
dishes{
name
ingredients{
name
}
}
}
}
This query shows the ingredients
query{
dishes{
name
ingredients{
name
}
}
}
}
Any solution?