appwrite/docs/examples/1.5.x/server-php/examples/databases/create-relationship-attribute.md

setEndpoint('https://cloud.appwrite.io/v1') // Your API Endpoint ->setProject('5df5acd0d48c2') // Your project ID ->setKey('919c2d18fb5d4...a2ae413da83346ad2'); // Your secret API key $databases = new Databases($client); $result = $databases->createRelationshipAttribute( databaseId: '', collectionId: '', relatedCollectionId: '', type: RelationshipType::ONETOONE(), twoWay: false, // optional key: '', // optional twoWayKey: '', // optional onDelete: RelationMutate::CASCADE() // optional );