appwrite/docs/examples/1.7.x/server-graphql/examples/databases/create-relationship-attribute.md

mutation { databasesCreateRelationshipAttribute( databaseId: "<DATABASE_ID>", collectionId: "<COLLECTION_ID>", relatedCollectionId: "<RELATED_COLLECTION_ID>", type: "oneToOne", twoWay: false, key: "", twoWayKey: "", onDelete: "cascade" ) { key type status error required array _createdAt _updatedAt relatedCollection relationType twoWay twoWayKey onDelete side } }