graphql - Refer to other fields in mutation - graphql

Question

I want to create 2 related objects, e.g. 1 Location and 1 Place where Place has a reference to Location like so:
type Location {
id: String
name: String
}
type Place {
id: String
locationId: String
}
Is it possible to do this with 1 mutation request? Currently I'm doing this with 2 separate mutation requests like below:
mutation ($locationName: String!) {
insert_Location(objects: {name: $locationName}) {
returning {
id
}
}
}
//in another request, use the id returned from the request above
mutation ($locationId: String!) {
insert_Place(objects: {locationId: $locationId}) {
returning {
id
}
}
}
I'm aware it's possible to have multiple fields in a mutation so I could create 2 Locations in 1 mutation request like below.
mutation ($locationName: String!) {
location1: insert_Location(objects: {name: $locationName}) {
returning {
id
}
}
location2: insert_Location(objects: {name: $locationName}) {
returning {
id
}
}
}
However if I wanted to do this to create 1 Location and 1 Place, is there a way to retrieve the created Location Id and pass it to the 2nd field to create the Place?

Answer 1

For future reference:
As #Xetera pointed out, because the 2 types have a foreign key relationship you can do a nested insert mutation where hasura would handle setting the foreign key value. In my case it would look something like:
mutation ($locationName: String!) {
insert_Place(
objects: {
Location: {data: {name: $locationName}}, //hasura will create Location and assign the id to Place.locationId
}
) {
returning {
id
}
}
}
Docs here for further reading: https://hasura.io/docs/1.0/graphql/manual/mutations/insert.html#insert-an-object-along-with-its-related-objects-through-relationships