fix pagination issues on backend

backend/app/api/handlers/v1/v1_ctrl_items.go

@@ -1,6 +1,8 @@
 package v1
 
 import (
+	"database/sql"
+	"errors"
 	"net/http"
 
 	"github.com/hay-kot/homebox/backend/internal/core/services"
@@ -41,6 +43,11 @@ func (ctrl *V1Controller) HandleItemsGetAll() server.HandlerFunc {
 		ctx := services.NewContext(r.Context())
 		items, err := ctrl.repo.Items.QueryByGroup(ctx, ctx.GID, extractQuery(r))
 		if err != nil {
+			if errors.Is(err, sql.ErrNoRows) {
+				return server.Respond(w, http.StatusOK, repo.PaginationResult[repo.ItemSummary]{
+					Items: []repo.ItemSummary{},
+				})
+			}
 			log.Err(err).Msg("failed to get items")
 			return validate.NewRequestError(err, http.StatusInternalServerError)
 		}

backend/internal/data/repo/repo_items.go

@@ -326,23 +326,23 @@ func (e *ItemsRepository) QueryByGroup(ctx context.Context, gid uuid.UUID, q Ite
 		)
 	}
 
+	count, err := qb.Count(ctx)
+	if err != nil {
+		return PaginationResult[ItemSummary]{}, err
+	}
+
+	qb = qb.Order(ent.Asc(item.FieldName)).
+		WithLabel().
+		WithLocation()
+
 	if q.Page != -1 || q.PageSize != -1 {
 		qb = qb.
 			Offset(calculateOffset(q.Page, q.PageSize)).
 			Limit(q.PageSize)
 	}
 
-	items, err := mapItemsSummaryErr(
+	items, err := mapItemsSummaryErr(qb.All(ctx))
-		qb.Order(ent.Asc(item.FieldName)).
-			WithLabel().
-			WithLocation().
-			All(ctx),
-	)
-	if err != nil {
-		return PaginationResult[ItemSummary]{}, err
-	}
 
-	count, err := qb.Count(ctx)
 	if err != nil {
 		return PaginationResult[ItemSummary]{}, err
 	}