GraphQL multiple queries in one request - graphql

Question

I have some groups created by users in my database. Each group has multiple members in it. This is what a typical group looks like:
{
"groupName": "some-group-name",
"userIds": ["001", "002", "003"]
}
I also have a separate node of users in my database. This is what a user looks like:
{
"id": "001",
"userName": "some-unique-username"
}
I want to list every single group and its members. So, it would be:
group1
user1 id; user1 name;
user2 id; user2 name;
group2
user3 id; user3 name;
user4 id; user4 name;
and so on...
How would it be possible (if at all) to fetch these groups and their user ids and also query for users by id and return a single JSON containing all the data only with one request?
Right now I'm just fetching some amount of groups and iterating over the userIds of each of them and sending a request for each user separately.
I'm not asking about pagination or simple querying, I just want to get every group and the users inside those groups.

Answer 1

Figured it out myself.
What I needed to do was to create a separate resolver for fetching members of each group:
resolvers: {
...
Group: {
members: (group, _, context) => group.members.map(memberId => context.db.findUserById(memberId)
}
...
}
The parent group object is passed as the first argument to the resolver so when I query:
{
groups(count: 10){
name
members {
name
}
}
}
It returns the names of the first 10 groups along with its members' names.

Answer 2

With the following schema,
type User {
name: String
firstName: String
location: String
}
type Group {
groupname:String!
users:[User!]
}
type Query {
groups:[Group!]
group(name: String): Group
}
the following query:
{
groups
{
groupname
users {
name
firstName
location
}
}
}
could return
{
{ name: "group1",
users: [{name:"user1", firstName:"firstName1", location:"Localtion1"},
{name:"user2", firstName:"firstName2", location:"Localtion2"}]
},
{ name: "group2",
users: [{name:"user1", firstName:"firstName1", location:"Localtion1"}]
},
...etc..
}
Hope this helps,