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Description
Apollo Federation v2.1 introduced new @composeDirective directive that allows users to specify directives that should be preserved in the supergraph composition (by default composition strips out most directives from supergraph).
extend schema
@link(
url: "https://specs.apollo.dev/federation/v2.3",
import: ["@composeDirective", "@extends", "@external", "@key", "@inaccessible", "@interfaceObject", "@override", "@provides", "@requires", "@shareable", "@tag"]
)
@link(url: "https://myspecs.dev/myCustomDirective/v1.0", import: ["@custom"])
@composeDirective(name: "@custom")
// will be present in the supergraph definition
directive @custom on OBJECT
type Product @custom @key(fields: "id")
id: ID!
// other fields omitted for clarity
}
Additional resources:
New directive functionality can be tested using Apollo Federation Subgraph Compatibility NPX script (and Github Action). Example integration project is already provided in the subgraph compatibility testing repository.