appwrite/docs/examples/1.4.x/server-graphql/examples/databases/create-relationship-attribute.md

mutation { databasesCreateRelationshipAttribute( databaseId: "[DATABASE_ID]", collectionId: "[COLLECTION_ID]", relatedCollectionId: "[RELATED_COLLECTION_ID]", type: "oneToOne" ) { key type status error required relatedCollection relationType twoWay twoWayKey onDelete side } }