Method OnlyID

ent/node_query.go:211–225

OnlyID is like Only, but returns the only Node ID in the query. Returns a *NotSingularError when more than one Node ID is found. Returns a *NotFoundError when no entities are found.

(ctx context.Context)

// Returns a *NotSingularError when more than one Node ID is found.
// Returns a *NotFoundError when no entities are found.
func (nq *NodeQuery) OnlyID(ctx context.Context) (id string, err error) {
	var ids []string
	if ids, err = nq.Limit(2).IDs(setContextOp(ctx, nq.ctx, ent.OpQueryOnlyID)); err != nil {
		return
	}
	switch len(ids) {
	case 1:
		id = ids[0]
	case 0:
		err = &NotFoundError{node.Label}
	default:
		err = &NotSingularError{node.Label}
	}
	return
}

// OnlyIDX is like OnlyID, but panics if an error occurs.
func (nq *NodeQuery) OnlyIDX(ctx context.Context) string {