(I've used GraphQL at Facebook, but I don't work on it.)
If I understand your post correctly, I think it could. GraphQL prefers to expose full objects, rather than IDs, which lets you query for data inside objects at the same time. So for your example above, you would only need one GraphQL query:
viewer() {
posts {
node {
author { id, name, favorite_color },
// any other post data you want
}
},
friends {
node {
id,
name,
favorite_color,
}
},
notifications {
node {
source { id, name, favorite_color },
// any other notification fields you want
}
},
}
The "id, name, favorite_color" is just a sample set of fields, you could replace it with whichever your components needed. Relay also has functionality to avoid duplicating the set of fields, which is especially useful when you want to add or remove a field from what a reusable component needs.
If I understand your post correctly, I think it could. GraphQL prefers to expose full objects, rather than IDs, which lets you query for data inside objects at the same time. So for your example above, you would only need one GraphQL query:
The "id, name, favorite_color" is just a sample set of fields, you could replace it with whichever your components needed. Relay also has functionality to avoid duplicating the set of fields, which is especially useful when you want to add or remove a field from what a reusable component needs.