Method Only

pkg/database/ent/machine_query.go:134–147

Only returns a single Machine entity found by the query, ensuring it only returns one. Returns a *NotSingularError when more than one Machine entity is found. Returns a *NotFoundError when no Machine entities are found.

(ctx context.Context)

// Returns a *NotSingularError when more than one Machine entity is found.
// Returns a *NotFoundError when no Machine entities are found.
func (_q *MachineQuery) Only(ctx context.Context) (*Machine, error) {
	nodes, err := _q.Limit(2).All(setContextOp(ctx, _q.ctx, ent.OpQueryOnly))
	if err != nil {
		return nil, err
	}
	switch len(nodes) {
	case 1:
		return nodes[0], nil
	case 0:
		return nil, &NotFoundError{machine.Label}
	default:
		return nil, &NotSingularError{machine.Label}
	}
}

// OnlyX is like Only, but panics if an error occurs.
func (_q *MachineQuery) OnlyX(ctx context.Context) *Machine {