URQL - interface resolvers in graphcache

[01jonathanf]

Hi all, needing some beginner help here,

I understand to relate a query to an entity in graphcache it can be done simply like so:

getTodo: (_parent, args) => ({ __typename: "Todo", id: args.id })

How can you create the same relationship with a query to an interface type which can return potentially multiple different typenames? e.g.: say I had an Animal interface and wanted the cache to lookup multiple typenames here:

getAnimal: (_parent, args) => ({ __typename: could be "Dog", "Cat", etc..., id: args.id })

[JoviDeCroock]

I think you'd be best off checking whether cache.resolve({ __typename: 'Dog', id }, 'id') || cache.resolve({ __typename: 'cat', id }, 'id') returns a field and use that. The cache is the thirth parameter of your function there.

[01jonathanf]

Thanks, well currently what I've done to get it to work is this:

const { id } = args;
const typename =
              cache.resolve({ __typename: "Folder", id }, "__typename") ||
              cache.resolve({ __typename: "Journey", id }, "__typename");

return { __typename: typename, id: args.id };

so returning the typename from cache.resolve and then returning it in the object. is there a cleaner way to do this though directly from cache.resolve?

[JoviDeCroock]

Currently this seems like a good solution with our current API-surface