Deleting Data

await gom.delete(Person, uuid);                                                  // returns how many: 1 or 0
await gom.delete(Issue, uuid, { where: (q) => q.state.eq('closed') });           // only if it meets the condition
await gom.deleteAll(Issue, (q) => ({ where: q.state.eq('closed') }));            // what a load with the filter finds
await gom.deleteAll(RaisedAndAssignedIssue, (q) => ({ where: q.assignedTo.name.eq('Former Employee') }));
await gom.deleteAll(Issue, 'n.locked = true');                                   // a predicate of your own, over n

A delete removes the root and its relationships. The nodes they led to stay, unless the delete cascades. Deleting a view by id can also delete the nodes it reaches:

await gom.delete(SessionView, sessionId);                                          // NONE: the root only
await gom.delete(SessionView, sessionId, { cascade: CascadeType.DELETE_ORPHAN });  // and each node left with no relationship
await gom.delete(SessionView, sessionId, { cascade: CascadeType.DELETE_ALL });     // and every node in the view

The cascade follows the view’s relationships, through nested views; a node outside the view is never deleted. DELETE_ALL deletes nodes others may still point at, so use it for nodes the root owns. DELETE_ORPHAN isn’t available on Memgraph.