Get() methods from all repositories now return a ErrNotFound when the id is nonexistent

persistence/ledis_repository.go

@@ -6,7 +6,6 @@ import (
 	"fmt"
 	"reflect"
 	"strings"
-
 	"time"
 
 	"github.com/deluan/gosonic/domain"
@@ -228,6 +227,9 @@ func (r *ledisRepository) readEntity(id string) (interface{}, error) {
 	if err != nil {
 		return nil, err
 	}
+	if len(res[0]) == 0 {
+		return nil, domain.ErrNotFound
+	}
 	err = r.toEntity(res, entity)
 	return entity, err
 }