GraphQL typedef mutation need to accept an Array

Question

How can I pass an array of custom type in a mutation when declaring typeDefs in GraphQL?

 type Itinerary { name: String! itinerary: [Location]! } input Location { name: String! country: String region: String city: String duration: Int! } type Mutation { addItinerary( name: String!, itinerary: [Location]!, ): Itinerary } 

I get the error in graphiql "The type of Itinerary.itinerary must be Output Type but got: [Location]!"

It seems to be such a trivial task but I could not find anything specific to this case

Answer 1

You're returning a type of Itinerary , which itself contains a nested Location , however you've stated that Location is an input type , which can't be returned as the result of a mutation. You need to define separate input types and can't return them.