Mutation arguments as object - go

Question

I'm using the Go implemenatation of GraphQL.
How would you configure a mutation so that it can receive arguments with more than 1 level?
For exemple, here is the list of arguments I would like to pass to a mutation CreateUser:
mutation createUser($user: CreateUser!) {
createUser(input: $user)
}
{
"user": {
"name": {
"first": "John",
"last": "Doe"
},
"email": "john#doe.com"
}
}
(Notice that I dont want to use firstname and lastname but a name object instead)
And this is my (unsuccessful) attempt so far:
var CreateUserInput = graphql.FieldConfigArgument{
"input": &graphql.ArgumentConfig{
Description: "Input for creating a new user",
Type: graphql.NewNonNull(graphql.NewInputObject(graphql.InputObjectConfig{
Name: "CreateUser",
Fields: graphql.InputObjectConfigFieldMap{
"name": &graphql.InputObjectFieldConfig{
Type: graphql.NewNonNull(graphql.NewInputObject(graphql.InputObjectConfig{
Fields: graphql.InputObjectConfigFieldMap{
"first": &graphql.InputObjectFieldConfig{
Type: graphql.NewNonNull(graphql.String),
},
"last": &graphql.InputObjectFieldConfig{
Type: graphql.NewNonNull(graphql.String),
},
},
})),
},
"email": &graphql.InputObjectFieldConfig{
Type: graphql.NewNonNull(graphql.String),
},
},
})),
},
}
Apparently the subfields first and last are not recognized as this is what I get when I run this mutation:
{
"data": null,
"errors": [
{
"message": "Variable \"$user\" got invalid value {\"email\":\"john#doe.com\",\"name\":{\"first\":\"john\",\"last\":\"doe\"}}.\nIn field \"name\": In field \"first\": Unknown field.\nIn field \"name\": In field \"last\": Unknown field.",
"locations": [
{
"line": 1,
"column": 21
}
]
}
]
}
Is this even possible?
EDIT: See comments in the accepted answer for the solution.

Answer 1

This are my first ever lines of Go but I will try to convey what I think the problem is.
First lets talk about the structure you want to be going for. I will use SDL here:
type Mutation {
createUser(user: CreateUser!): Boolean! # Maybe return user type here?
}
input CreateUser {
name: CreateUserName!
email: String!
}
input CreateUserName {
first: String!
last: String!
}
Okay now that we know that we need two input types lets get started!
var CreateUserName = graphql.NewInputObject(graphql.InputObjectConfig{
Name: "CreateUserName",
Fields: graphql.InputObjectConfigFieldMap{
"first": &graphql.InputObjectFieldConfig{
Type: graphql.NewNonNull(graphql.String),
},
"last": &graphql.InputObjectFieldConfig{
Type: graphql.NewNonNull(graphql.String),
},
},
})
var CreateUser = graphql.NewInputObject(graphql.InputObjectConfig{
Name: "CreateUser",
Fields: graphql.InputObjectConfigFieldMap{
"name": &graphql.InputObjectFieldConfig{
Type: graphql.NewNonNull(CreateUserName),
},
"email": &graphql.InputObjectFieldConfig{
Type: graphql.NewNonNull(graphql.String),
},
},
})
Now all that should be left is adding the mutation field to your mutation object type.