Method Only

ent/setting_query.go:108–121

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

(ctx context.Context)

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

// OnlyX is like Only, but panics if an error occurs.
func (sq *SettingQuery) OnlyX(ctx context.Context) *Setting {