How would i extract types directly out of my introspection_types?

[stubifox]

Hi there,

I’m currently working with GraphQL Tada and I’m trying to directly extract types from the introspection_types.

I understand that ResultOf and VariablesOf can be used for extracting types from queries and mutations, which I already use at some points but it does not help with my problem.

$\texttt{The following lines are just an example made up on the spot, I am trying to generalize the problem here :)}$

Lets say i have a query that retrieves User Data. The type of User is now located within the return Data somewhere.
We could say i could use

type User = ResultOf<typeof USER_QUERY>['user']

Or something like that.
However my query has many possible return types encoded in _typename. Like UserResponse or ErrorResponse or ServerInterceptionResponse...
My TS Server can now not access ['user'].

If I then want to declare a state/variable/Record with the type User I would need to copy the type from my backend or use codegen; which kind of defies the purpose of gql.tada.

I also tried to extract it from the introspection_types like this:

type User = introspection_types['User']['fields']

Which actually gives me the keys of the User but the types of the corresponding field of lets say user.firstName is still

(property) 'firstName': {
    name: "firstName";
    type: {
        kind: "SCALAR";
        name: "String";
        ofType: null;
    };
}

Which i can not tranlate (easily) into typescript types.

My question now is why it is not possible to easily extract types from the introspection_types and utilize them as typescript types.

If there is a way please let me know. And thank you in advance.

Best regards,
Max

[kitten]

You can't retrieve a concrete type for an object type as it depends on a selection set, arguments, etc.

See:

• Extract Object types #233 (comment)
• https://discord.com/channels/1082378892523864074/1247901049294164018/1247904914957533215
• Get all the possible returned fields and types for query fields #381 (comment)

You should be creating fragments instead to derive the types of object selections

[stubifox]

thanks for the quick response!

[stubifox]

the discord link does not work for me though :/