__typename should not be optional when used in query

Describe the bug When use __typename in a query, it’s type should not be optional in corresponding query namespace.

To Reproduce Steps to reproduce the behavior:

schema:

# schema.graphql

type Person {
  name: String!
}

type Query {
  person: Person
}

document:

query search {
  person {
    __typename
    name
  }
}

command: gql-gen --template graphql-codegen-typescript-template --schema schema.graphql document.graphql --out schema.ts

Expected behavior

The namespace of query search in generated schema.ts:

export namespace Search {
  export type Variables = {};

  export type Query = {
    __typename?: "Query";
    person?: Person | null;
  };

  export type Person = {
    __typename?: "Person"; // <- this should not be optional because we used it in query
    name: string;
  };
}

Search.Person.__typename is optional, while it should not be.

Environment:

• OS: Arch Linux (latest)
• Codegen: 0.12.6
• Node: 10.11.0
• graphql: 14.0.2

[mfbx9da4]

So this is supposedly fixed but I don’t see any docs of how to use the query version where __typename is required any guidance?

[dotansimha]

Fixed in 0.15.2 😃