Is there any way to set default value for extended property in subgraph, for case of if property is null in supergraph?

Question

type Book @key(fields: "id language country name desc") @extends { id: ID! @external language: String! @external country: String @external name: String! @external description: String! @external information: MetaInformation @requires(fields: "id language country name desc ") }

here I extended book with information property and other ones are coming from Book graph, I want to know how I can set default value for country? It can be null in Book graph but it requires for fetching information property or somehow I should handle it in datafetcher.

Kyle · Accepted Answer · 2022-06-21 19:11:07Z

It sounds like you need to use an extended entity instead of an extended type, there are more details on this on the Apollo docs here: https://www.apollographql.com/docs/federation/v1/entities/#extending-entities

A similar thread related to extending types in GQL's spec: https://stackoverflow.com/a/56204966/9281567

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