Introduce Key Directive #31
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dariuszkuc
reviewed
Apr 12, 2024
| The `@key` directive designates an object type as an entity and specifies its key fields (a set of fields that the _source schema_ can use to uniquely identify any instance of the entity). | ||
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| ```graphql | ||
| directive @key(fields: FieldSet!) repeatable on OBJECT | INTERFACE |
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We probably should also support the semantics for marking type as non-resolvable (used for referencing entities without contributing fields)
In Federation we use optional resolvable: Boolean = true argument to indicate this but we could use different mechanism (different directive?).
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This PR introduces the
@keydirective to the spec which is used to declare the keys of an entity by which it can be fetched from a source schema.