Resolvers

GraphQL Field resolvers

Resolvers are files or named exports.

Default export

export default (input) => {
    return  "Hello world"
}

Handler export

export const handler = (input) => {
    return "Hello world"
}

Named export

export const (input) => {
    return "Hello world"
}

{
    "resolvers":{
        "RESOLVER_TYPE.RESOLVER_FIELD":{
            "resolve":{
                "name": "PATH_TO_RESOLVER.someName"
            }
        }
    }
}

Passing arguments to another resolver:

Resolver "Query.todoOperations"

schema.graphql

type TodoOperations{
    getCreditCardNumber(id: String!): String
    showMeTehMoney: Int
}

type Query{
    todoOps: TodoOperations
}

stucco.json

{
    "resolvers":{
        "Query.todoOps":{
            "resolve":{
                "name": "lib/todoOps"
            }
        },
        "TopoOps.getCreditCardNumber":{
            "resolve":{
                "name": "lib/getCreditCardNumber"
            }
        }
    }
}

lib/todoOps.js

export default (input) => {
    return {
        creditCards:{
            dupa: "1234-1234-1234-1234",
            ddd: "1222-3332-3323-1233"
        }
    }
}

lib/getCreditCardNumber.js

export default (input) => {
    const { id } = input.arguments
    return {
        response: input.source.creditCards[id]
    }
}