Issues with GraphQL Nested Mutation - graphql

Question

I am trying to achieve nesting mutation by adding player name in Team (Parent) and struggling trying to fetch list of player name...
Inside GraphiQL tool (localhost:4000/graphiql), this is the Add Mutation variable that I have included...
mutation AddPlayerToTeam($name: String!, $teamId: ID!){
addPlayerToTeam(player: $name, teamId: $teamId){
id
players{
name
}
}
}
The query variables, adding teamID and name...
{
"teamId": "5aff545371fc930a4c43b2b9",
"name": "John Doe"
}
The result shown...
{
"data": {
"addPlayerToTeam": {
"id": "5b072774e385740c38483111",
"players": []
}
}
}
But I was expecting for player name to show up like this....
{
"data": {
"addPlayerToTeam": {
"id": "5b072774e385740c38483111",
"players": [
{
"name": "John Doe"
}
]
}
}
}
The mutation code...
AddPlayerToTeam: {
type: TeamType,
args: {
name: { type: new GraphQLNonNull(GraphQLString) },
teamId: { type: new GraphQLNonNull(GraphQLID) }
},
resolve(parent, { name, teamId }) {
let addPlayer = new Player({ name, teamId });
return addPlayer.save();
}
},
I've struggled to find reason why I am getting "players": [] instead of "players": [ {"name": "John Doe" } ].
Need I include .then(...) after .save() to get result? Any examples? Your help is appreciated.
BTW, I using mongoDB/mongoose method. Saving them in local mongoDB.

Answer 1

Found solution for this... Thank #andrewingram from graphql.slack for helping. Just include .then(...) to return result.
AddPlayerToTeam: {
type: TeamType,
args: {
name: { type: new GraphQLNonNull(GraphQLString) },
teamId: { type: new GraphQLNonNull(GraphQLID) }
},
async resolve(parent, { name, teamId }) {
let addPlayer = new Player({ name, teamId });
await addPlayer.save();
return Team.findById(teamId);
}
},
or in promise version
resolve(parent, { name, teamId }) {
let addPlayer = new Player({ name, teamId });
return addPlayer.save().then(() => Team.findById(teamId));
}
Hope that help.